SSP_50821.doc

SSP 50821

Revision B

Requirements Specification for the International Space Station (ISS) Second Treadmill (T2)

International Space Station Program

Revision B

August 2008

Export Administration Regulations (EAR) Notice

This document contains information controlled by the Export Administration Regulations (EAR), 15 CFR 730-774, and has been classified as EAR99/No License Required.

National Aeronautics and Space Administration International Space Station Program Johnson Space Center Houston, Texas Contract No.: NNJ04AA01C

REVISION AND HISTORY PAGE

PREFACE

requirements specification for the international space station (ISS) Second treadmill (T2) The Requirements Specification for the International Space Station (ISS) Second Treadmill (T2) defines the functional and performance requirements for the development of the second ISS treadmill. This document is developed in accordance with the format specified in SSP 41171, Preparation of Program Unique Specifications.

The contents of this document are intended to be consistent with the tasks and products to be prepared by the International Space Station Program Partners as defined in SSP 41000, International Space Station System Specification. This document is developed and maintained by the Space Station Vehicle Office. The initial baseline release was under the control of the Space Station Control Board (SSCB). The SSCB delegates control and approval authority for all future updates and/or revisions to the Multilateral Vehicle Control Board (MVCB).

SHAPE \* MERGEFORMAT

INTERNATIONAL SPACE STATION PROGRAM

international space station (ISS) Second treadmill (T2)

CONCURRENCE

August 2008 international space station (ISS) Second treadmill (T2)

CONCURRENCE

August 2008 international space station (ISS) Second treadmill (T2)

LIST OF CHANGES

august 2008 All changes to paragraphs, tables, and figures in this document are shown below:

Board Name

Entry Date

Change

Paragraph(s)

November 2007

Baseline

All

January 2008

Revision A

All

December 2008

Revision B

All

TABLE OF CONTENTS

PARAGRAPH

PAGE

1-11.0 introduction

1.1 purpose

1-1 1.2 scope

1-1 1.3 responsibility and change authority

1-1 1.4 verb application

1-1 2.0 documents

2-1 2.1 applicable documents

2-1 2.1.1 government documents

2-1 2.1.2 non-government documents

2-7 2.2 reference documents

2-7 3.0 requirements

3-1 3.1 definition

3-1 3.1.1 diagrams

3-1 3.1.2 interface definition

3-2 3.1.2.1 ISS interfaces

3-2 3.1.2.2 human interfaces

3-2 3.1.3 major components list

3-2 3.1.4 government furnished materials

3-3 3.1.5 contractor furnished materials

3-4 3.1.6 International Partner furnished materials

3-4 3.1.7 MPLM interfaces

3-4 3.1.7.1 mplm structural attach points interface

3-4 3.1.7.2 attach points loads

3-4 3.1.8 rack requirements

3-4 3.1.8.1 modal frequency

3-4 3.1.8.2 keep-out zone

3-4 3.1.8.3 Portable Fire Extinguisher (pfe) discharge

3-4 3.1.8.4 rotation restraints

3-5 3.1.8.5 pressure relief devices

3-5 3.1.8.6 On-orbit keep-out zone

3-6 3.1.8.7 Mass properties

3-6 3.1.8.7.1 Launch/landing/ground handling mass

3-6 3.1.8.7.2 On-orbit mass

3-6 3.2 Characteristics

3-7 3.2.1 functional performance characteristics

3-7 3.2.1.1 Provide exercise platform

3-7 3.2.1.1.1 crew exercise capability

3-7 3.2.1.1.2 modes of operation

3-7 3.2.1.1.3 configuration time

3-7 3.2.1.1.4 configuration resources

3-7 3.2.1.1.5 treadbelt start up

3-7 3.2.1.1.6 time controlled stages

3-8 3.2.1.1.7 Reserved

3-8 3.2.1.1.8 Reserved

3-8 3.2.1.1.9 Reserved

3-8 3.2.1.2 Isolate ISS structure from exercise-induced vibrations

3-8 3.2.1.2.1 Limit microgravity disturbances

3-8 3.2.1.2.2 stabilize running surface

3-8 3.2.1.3 Restrain an exercising crewmember

3-8 3.2.1.3.1 restraint mechanism

3-8 3.2.1.3.2 configuration of restraint mechanism

3-8 3.2.1.4 monitor and measure human performance

3-9 3.2.1.4.1 heart rate

3-9 3.2.1.4.2 reserved

3-9 3.2.1.5 control, display and distribute data

3-9 3.2.1.5.1 programmed exercise protocols

3-9 3.2.1.5.1.1 programmed exercise individualization

3-9 3.2.1.5.1.2 programmed exercise protocol uplink

3-9 3.2.1.5.1.3 reserved

3-9 3.2.1.5.2 exercise session results

3-9 3.2.1.5.2.1 measure performance parameters

3-9 3.2.1.5.2.2 record performance parameters

3-10 3.2.1.5.2.3 downlink performance parameters

3-10 3.2.1.5.2.4 reserved

3-11 3.2.1.5.2.5 reserved

3-11 3.2.1.5.3 engineering parameter

3-11 3.2.1.6 control and redistribute electrical power

3-11 3.2.1.7 control and redistribute thermal loads

3-11 3.2.1.8 integrated system requirements

3-11 3.2.1.8.1 ensure audibility of alarms

3-11 3.2.1.8.2 power on/off

3-11 3.2.1.8.3 reserved

3-11 3.2.1.8.4 nomenclature

3-11 3.2.1.8.5 system start-up

3-11 3.2.2 physical characteristics

3-12 3.2.2.1 exercise physical characteristics

3-12 3.2.2.1.1 reserved

3-12 3.2.2.1.2 locomotion surface length

3-12 3.2.2.1.3 locomotion surface width

3-12 3.2.2.1.3.1 step-off area

3-12 3.2.2.1.4 handrail

3-12 3.2.2.1.4.1 handrail position

3-12 3.2.2.1.4.2 handrail Orientation

3-12 3.2.2.1.4.3 handrail accessibility

3-12 3.2.2.1.4.4 handrail mounting provision

3-13 3.2.2.2 vibration isolation physical characteristics

3-13 3.2.2.2.1 t2 vibration isolation system operating envelope

3-13 3.2.2.3 t2 crew restraint physical characteristics

3-13 3.2.2.3.1 lateral component of subject loading system placement

3-13 3.2.2.3.2 vertical component of subject loading System placement

3-13 3.2.2.3.3 longitudinal component of subject loading system placement

3-13 3.2.2.4 t2 control panel physical characteristics

3-13 3.2.2.4.1 control panel mounting provision

3-13 3.2.2.4.2 control panel visibility

3-14 3.2.2.4.3 control panel assembly

3-14 3.2.2.4.4 reserved

3-14 3.2.3 reliability

3-14 3.2.3.1 failure tolerance

3-14 3.2.3.2 failure propagation

3-14 3.2.3.3 separation of redundant paths

3-14 3.2.3.4 redundancy status

3-14 3.2.3.5 channelization

3-14 3.2.4 maintainability

3-15 3.2.4.1 removal and replacement

3-15 3.2.4.1.1 nonpressurized area equipment maintenance time

3-15 3.2.4.1.2 access item retention

3-15 3.2.4.1.3

INSTALLATION/REMOVAL

3-15 3.2.4.1.3.1

EQUIPMENT ITEM INTERCONNECTING DEVICES

3-15 3.2.4.1.3.2

INCORRECT EQUIPMENT INSTALLATION

3-15 3.2.4.1.3.2.1

PHYSICAL INSTALLATION

3-15 3.2.4.1.3.2.2

COLOR CODING

3-15 3.2.4.1.3.3

LOCKWIRING AND STAKING

3-15 3.2.4.1.3.4

FLUID CAPTURE AND CONTAINMENT

3-15 3.2.4.2 maintenance man-hour requirements

3-15 3.2.4.3 failure detection, isolation and recovery

3-16 3.2.4.3.1 manual failure detection, isolation and recovery

3-16 3.2.4.3.2 reserved

3-16 3.2.4.3.3 reserved

3-16 3.2.4.3.4 reserved

3-16 3.2.4.3.5 reserved

3-16 3.2.4.3.6 reserved

3-16 3.2.4.4 electrostatic discharge

3-16 3.2.5 environmental conditions

3-16 3.2.5.1 Thermal

3-16 3.2.5.1.1 operating thermal environment

3-16 3.2.5.1.2 non-operating thermal environment

3-16 3.2.5.1.3 thermal environmental tolerance

3-17 3.2.5.2 Pressure

3-17 3.2.5.2.1 operating pressure environment

3-17 3.2.5.2.2 non-operating pressure environment

3-17 3.2.5.2.3 on-orbit depress/repress pressure environment

3-17 3.2.5.3 Humidity

3-17 3.2.5.3.1 operating humidity environment

3-17 3.2.5.3.2 non-operating humidity environment

3-17 3.2.5.3.3 humidity environmental tolerance

3-18 3.2.5.4 reserved

3-18 3.2.5.5 External contamination environment

3-18 3.2.5.6 Electromagnetic and Geomagnetic Fields

3-18 3.2.5.7 Plasma

3-18 3.2.5.8 Ionizing radiation

3-18 3.2.5.9 Solar ultraviolet radiation

3-18 3.2.5.10 Meteoroids and orbital debris

3-18 3.2.5.11 Vibration

3-18 3.2.5.11.1 operating vibration environment

3-18 3.2.5.11.2 non-operating vibration environment

3-19 3.2.5.11.3 Vibration environmental Tolerance

3-19 3.2.5.12 Acoustic

3-19 3.2.5.12.1 operating acoustic environment

3-19 3.2.5.12.2 Non-opeating acoustic environment

3-20 3.2.5.12.3 acoustic environmental tolerance

3-20 3.2.5.13 Acceleration

3-21 3.2.5.13.1 operating acceleration environment

3-21 3.2.5.13.2 non-operating acceleration environment

3-21 3.2.5.13.3 acceleration environment Tolerance

3-22 3.2.5.14 Plume impingement pressures

3-22 3.2.5.15 Shock

3-22 3.2.5.15.1 Transportation shock environment

3-22 3.2.5.15.2 On-orbit shock environment

3-22 3.2.6 transportability

3-22 3.3 design and construction

3-22 3.3.1 materials, processes and parts

3-22 3.3.1.1 materials and processes

3-22 3.3.1.1.1 nasa-provided equipment

3-22 3.3.1.1.2 esa-provided equipment

3-22 3.3.1.1.3 previously-certified equipment

3-23 3.3.1.1.4

COMMERCIAL OFF-THE-SHELF (COTS) EQUIPMENT

3-23 3.3.1.1.5 fungus resistant material

3-23 3.3.1.2 electrical, electronic and electromechanical parts

3-23 3.3.1.2.1 EEE parts design

3-23 3.3.1.2.2 eee components derating

3-23 3.3.1.2.3 eee components practices

3-23 3.3.1.2.4 eee components source acceptance

3-24 3.3.1.3 seal life

3-24 3.3.1.4

RESERVED

3-24 3.3.1.5 medium rate data link constraints

3-24 3.3.1.6 valve position

3-24 3.3.2 electromagnetic radiation

3-24 3.3.2.1 electromagnetic compatibility requirements

3-24 3.3.2.2 electromagnetic interference requirements

3-24 3.3.2.3 electrical grounding

3-24 3.3.2.4 electrical bonding

3-24 3.3.2.5 cable and wire design

3-25 3.3.2.6 electrostatic discharge

3-25 3.3.2.7 corona

3-25 3.3.2.8 lightning

3-25 3.3.3 nameplates and product marking

3-25 3.3.4 workmanship

3-26 3.3.4.1 cleanliness

3-26 3.3.4.2 cleanliness of surfaces in contact with fluids

3-26 3.3.4.2.1 internal surfaces

3-26 3.3.4.2.2 packaging design

3-26 3.3.5 interchangeability

3-26 3.3.6 safety

3-26 3.3.6.1 general

3-26 3.3.6.1.1 catastrophic hazards

3-26 3.3.6.1.2 critical hazards

3-27 3.3.6.1.3 Design for minimum risk

3-27 3.3.6.1.4 control of functions resulting in critical hazards

3-27 3.3.6.1.4.1 inadvertent operation resulting in critical hazards

3-27 3.3.6.1.4.2 loss of function resulting in critical hazards

3-27 3.3.6.1.5 control of functions resulting in catastrophic hazards

3-27 3.3.6.1.5.1 inadvertent operation resulting in catastrophic hazards

3-27 3.3.6.1.5.2 loss of function resulting in catastrophic hazards

3-28 3.3.6.1.6 Subsequent induced loads

3-28 3.3.6.1.7 Safety interlocks

3-28 3.3.6.2 Hazard detection and safing

3-28 3.3.6.2.1

RESERVED

3-28 3.3.6.2.2 Monitors

3-28 3.3.6.2.2.1 Status information

3-28 3.3.6.2.2.2 Hazardous function operation prevention

3-29 3.3.6.2.2.3

RESERVED

3-29 3.3.6.2.2.4

RESERVED

3-29 3.3.6.2.2.5

FLIGHT CREW AVAILABILITY

3-29 3.3.6.2.3 Near-real time monitoring

3-29 3.3.6.2.4 Real time monitoring

3-29 3.3.6.2.4.1 Maintain status of hazard controls

3-29 3.3.6.2.4.2 Crew response time and safing procedures

3-29 3.3.6.2.4.3 Ground monitoring

3-29 3.3.6.3 Command and computer control of hazardous functions

3-29 3.3.6.3.1 Computer control of hazardous functions

3-29 3.3.6.4 Hazardous materials

3-30 3.3.6.5 reserved

3-30 3.3.6.6 radiation

3-30 3.3.6.7 reserved

3-30 3.3.6.8 Electrical safety

3-30 3.3.6.8.1 Electrical power circuit overloads

3-30 3.3.6.8.1.1 Circuit overload protection

3-30 3.3.6.8.1.2 Protective device sizing

3-30 3.3.6.8.1.3 Bent pin or conductive contamination

3-30 3.3.6.8.2 Crew protection for electrical shock

3-30 3.3.6.8.3 Reapplication of power

3-31 3.3.6.8.4 Batteries

3-31 3.3.6.8.5 mismatched

3-31 3.3.6.9

RESERVED

3-31 3.3.6.10 Fire protection

3-31 3.3.6.10.1 Detection

3-31 3.3.6.10.2 Isolation

3-32 3.3.6.10.3 suppression

3-32 3.3.6.10.3.1 fire suppression access port accessibility

3-32 3.3.6.10.3.2 fire suppressant distribution

3-32 3.3.6.10.3.3 fire port Labeling

3-32 3.3.6.11 Constraints

3-32 3.3.6.11.1

RESERVED

3-32 3.3.6.11.2 pressurized volume depressurization and repressurization

3-32 3.3.6.11.2.1

PRESSURE DIFFERENTIAL TOLERANCE

3-32 3.3.6.11.2.2 Operation during pressure changes

3-33 3.3.6.11.3 Emergency egress

3-33 3.3.6.11.4

RESERVED

3-33 3.3.6.11.5

RESERVED

3-33 3.3.6.11.6 Component hazardous energy provision

3-33 3.3.6.11.7 reserved

3-33 3.3.6.11.8 reserved

3-33 3.3.6.11.9 reserved

3-33 3.3.6.11.10 reserved

3-33 3.3.6.11.11 reserved

3-33 3.3.6.11.12 Hazardous gas accumulation

3-33 3.3.6.11.13 Equipment clearance for entrapment hazard

3-33 3.3.6.11.14 Shatterable materials

3-33 3.3.6.12 Human engineering safety

3-34 3.3.6.12.1 Internal volume touch temperature

3-34 3.3.6.12.1.1 Continuous contact - high temperature

3-34 3.3.6.12.1.2 Incidental or momentary contact - high temperature

3-34 3.3.6.12.1.3 internal volume low touch temperature

3-34 3.3.6.12.2 reserved

3-34 3.3.6.12.3 reserved

3-34 3.3.6.12.4 Internal corner and edge protection

3-34 3.3.6.12.4.1 Equipment exposed to crew activity

3-34 3.3.6.12.4.2 Equipment exposed only during planned maintenance activities

3-34 3.3.6.12.5 reserved

3-35 3.3.6.12.6 Latches

3-35 3.3.6.12.7 Screws and bolts

3-35 3.3.6.12.8 Safety Critical Fasteners

3-35 3.3.6.12.9 Levers, cranks, hooks and controls

3-35 3.3.6.12.10 Burrs

3-35 3.3.6.12.11 Holes

3-35 3.3.6.12.12 protrusions

3-35 3.3.6.12.13 reserved

3-36 3.3.6.12.14 reserved

3-36 3.3.6.12.15 reserved

3-36 3.3.6.12.16 flexhoses

3-36 3.3.6.12.17 reserved

3-36 3.3.6.12.18 moving and rotating equipment

3-36 3.3.7 Human Engineering

3-36 3.3.7.1 anthropometric requirements

3-36 3.3.7.2 strength requirements

3-36 3.3.7.3 Maintenance

3-36 3.3.7.3.1 positive feedback

3-36 3.3.7.3.2 adjustment knobs

3-36 3.3.7.3.3 fastener knobs

3-36 3.3.7.3.4 crew interface

3-37 3.3.7.4 emergency controls

3-37 3.3.7.5

RESERVED

3-37 3.3.7.6 housekeeping

3-37 3.3.7.7 controls and displays

3-37 3.3.7.8 exterior colors

3-37 3.3.7.9 restraints and mobility aids

3-37 3.3.7.9.1 captive parts

3-37 3.3.7.9.2 handle and grasp area design requirements

3-38 3.3.7.9.2.1 handles and restraints

3-38 3.3.7.9.2.2 handle location/front access

3-38 3.3.7.9.2.3 handle dimensions

3-38 3.3.7.9.2.4 non-fixed handles design requirements

3-38 3.3.7.10 adequate clearance

3-38 3.3.8 Nuclear control

3-38 3.3.9 Security

3-38 3.3.10 environmental constraints

3-39 3.3.10.1 iNTERMITTENT nOISE lIMITS

3-39 3.3.10.2 continuous and stand-by noise

3-39 3.3.10.3

IONIZING RADIATION EMISSIONS LIMITS

3-39 3.3.10.4

IONIZING RADIATION CREW LIMITS

3-39 3.3.11 reserved

3-39 3.3.12 design requirements

3-40 3.3.12.1 structural design requirements

3-40 3.3.12.1.1 strength, stiffness, and resonant frequency

3-40 3.3.12.1.1.1 structural strength and stiffness

3-40 3.3.12.1.1.2 minimum resonant frequency

3-40 3.3.12.1.2 thermal effects

3-40 3.3.12.1.3 damage tolerance

3-40 3.3.12.1.3.1 m/od damage tolerance

3-40 3.3.12.1.3.2 eva induced loads

3-40 3.3.12.1.3.3 iva induced loads

3-40 3.3.12.1.3.3.1 crew-induced loads

3-40 3.3.12.1.4 system fracture control

3-40 3.3.12.1.5 reserved

3-41 3.3.12.1.6 reserved

3-41 3.3.12.1.7 reserved

3-41 3.3.12.1.8 reserved

3-41 3.3.12.1.9 design loads

3-41 3.3.12.1.10 factors of safety

3-41 3.3.12.1.11 margins of safety

3-41 3.3.12.1.12 general design requirements

3-41 3.3.12.1.13 structural materials criteria

3-41 3.3.12.1.13.1 materials selection

3-41 3.3.12.1.13.2 mechanical properties

3-41 3.3.12.1.14 secondary structure accommodations for human interface

3-41 3.3.12.1.15 nonstandard fasteners

3-41 3.3.12.2 fluid handling requirements

3-42 3.3.12.2.1 fluid standards

3-42 3.3.12.2.2 fluid quantity determination

3-42 3.3.12.2.3 interface hardware

3-42 3.3.12.2.4 INternal thermal control system (itcs) fluid charging

3-42 3.3.12.2.5 fail safe design

3-42 3.3.12.2.6 fluid leakage

3-42 3.3.12.2.7 quick-disconnect air inclusion

3-42 3.3.12.2.8 rack front surface temperature

3-42 3.3.12.3 fasteners

3-42 3.3.12.3.1 captive fasteners

3-43 3.3.12.3.2 self-threading fasteners

3-43 3.3.12.4

RESERVED

3-43 3.3.12.5 connectors

3-43 3.3.12.6 fluid connectors

3-43 3.3.12.6.1 fluid system connectors

3-43 3.3.12.6.2 used for hazardous fluids

3-43 3.3.12.6.3 used for contamination sensitive components

3-43 3.3.12.7 flexible lines and bellows design

3-43 3.3.12.8 operational life and timeline

3-43 3.3.12.8.1 system operating life

3-44 3.3.12.8.2 mechanical cycles

3-44 3.3.12.8.3 exercise life

3-44 3.3.12.9 reserved

3-44 3.3.12.10 alignment devices

3-44 3.3.12.11 handles

3-44 3.3.12.12 cable management

3-44 3.3.12.13 electrical power consuming equipment (EPCE) design

3-44 3.3.12.13.1 normal performance

3-44 3.3.12.13.2 Power ConformANCE

3-44 3.3.12.13.3 wire de-rating

3-44 3.3.12.13.4 loss of power

3-45 3.3.12.13.5 mating/demating of powered connectors

3-45 3.3.12.13.6 safety-critical circuits redundancy

3-45 3.3.12.13.7 rack Power switch (RPS)

3-45 3.4 computer resource requirement

3-45 3.5 logistics

3-45 3.5.1 maintenance

3-45 3.5.1.1 ON-orbit maintenance

3-45 3.5.1.1.1 corrective maintenance

3-45 3.5.1.1.2 in situ maintenance

3-45 3.5.1.1.3 oru intermediate maintenance

3-45 3.5.1.1.4 preventative maintenance

3-46 3.5.1.1.5 Pressurized volume rack rotation

3-46 3.5.1.2 reserved

3-46 3.5.1.3 access for on-orbit maintenance

3-46 3.5.1.3.1 reserved

3-46 3.5.1.3.2 visual access

3-46 3.5.1.3.3 eva access to fasteners

3-46 3.5.1.3.4 physical access

3-46 3.5.1.3.4.1 doors and access panels

3-46 3.5.1.3.5 removal, replacement, and modularity design

3-46 3.5.1.3.5.1 fluid release capture

3-46 3.5.1.3.6 design for maintainability

3-46 3.5.1.3.6.1 critical item accessibility

3-46 3.5.1.3.6.2 operational commonality

3-47 3.5.1.3.6.3 power removal

3-47 3.5.1.4 tools and test equipment

3-47 3.5.1.4.1 standard tools

3-47 3.5.1.4.2 hand tools

3-47 3.5.1.4.3 unique tools

3-47 3.5.1.5 standard on-orbit diagnostic equipment

3-47 3.5.1.6 ground maintenance

3-47 3.5.2 Supply

3-47 3.5.2.1 Re-supply

3-47 3.5.2.2 Additional launches

3-47 3.6 Personnel and training

3-48 3.7 Major Component Characteristics

3-48 3.7.1 Commercial- off-the-shelf (COTS) Treadmill COMPONENT

3-48 3.7.1.1 T2 Treadmill component performance characteristics

3-48 3.7.1.1.1 Active Mode

3-48 3.7.1.1.1.1 Minimum and Maximum Speed

3-48 3.7.1.1.1.2 Initialization

3-48 3.7.1.1.1.3 Speed Adjustment

3-48 3.7.1.1.1.4 Speed Adjustment Rate

3-48 3.7.1.1.1.5 Steady State, Active Mode

3-48 3.7.1.1.1.6 Acceleration

3-48 3.7.1.1.1.7 Deceleration

3-49 3.7.1.1.1.8 Emergency Stop Deceleration

3-49 3.7.1.1.2 Passive Mode

3-49 3.7.1.1.2.1 Resistive Force for Passive Mode

3-49 3.7.1.1.2.2 Resistive Force Range

3-49 3.7.1.1.2.3 Resistive Force Increment

3-49 3.7.1.1.2.4 Control of Resistive Force

3-49 3.7.1.1.2.5 Maximum Resistive Force to Initiate Treadbelt Movement

3-49 3.7.1.1.2.6 Maximum Resistive Force to Maintain Treadbelt Movement

3-50 3.7.1.1.3 Running Surface

3-50 3.7.1.1.3.1 Impact Resistance

3-50 3.7.1.1.3.2 Static Resistance

3-50 3.7.1.1.3.3 Slip Resistance

3-50 3.7.1.1.4 Emergency Stop Mechanism

3-50 3.7.1.1.4.1 Emergency stop mechanism accessibility

3-50 3.7.1.1.4.2 Emergency stop mechanism capability

3-51 3.7.1.1.5

RESERVED

3-51 3.7.1.1.6 Calibration

3-51 3.7.1.1.6.1 Calibration Verification

3-51 3.7.1.1.6.2 Calibration Adjustment

3-51 3.7.2 Modified International Standard Payload Rack (ISPR)

3-51 3.7.2.1 T2 Handrail characteristics

3-51 3.7.2.1.1 Handrail length

3-51 3.7.2.1.2 Handrail spacing

3-51 3.7.2.1.3 Handrail height

3-51 3.7.2.1.4 Handrail vertical strength

3-51 3.7.2.1.5 Handrail horizontal strength

3-52 3.7.2.1.6 handrail protrusion

3-52 3.7.3 Vibration Isolation System (VIS)

3-52 3.7.3.1 T2 VIS performance characteristics

3-52 3.7.3.1.1 Dynamic Response

3-52 3.7.3.1.2 Angular Displacement Stability during Normal Operations

3-52 3.7.3.1.3 Translational Displacement Stability during Normal Operations

3-52 3.7.4 Subject Loading System (SLS)

3-53 3.7.4.1 Permanent T2 Subject Loading System (SLS) characteristics

3-53 3.7.4.1.1 Load Range

3-53 3.7.4.1.2 Load Increments

3-53 3.7.4.1.3 Load Adjustment

3-53 3.7.4.1.4 Total Static Load Accuracy

3-53 3.7.4.1.5 Total Dynamic Load Accuracy

3-53 3.7.4.1.6 Static Load Difference between Left and Right

3-54 3.7.4.1.7 Total Dynamic Tension Accuracy

3-54 3.7.4.1.8 Subject Loading System (SLS) Displacement

3-54 3.7.4.1.8.1 Vertical Displacement

3-54 3.7.4.1.8.2 Mediolateral Displacement

3-54 3.7.4.1.8.3 Anterior/Posterior Displacement

3-54 3.7.4.1.9 Rate of Change of Load DURING INITIATION

3-55 3.7.4.1.10

RATE OF CHANGE OF LOAD DURING STAGE TRANSITION OR END OF SESSION

3-55 3.7.4.1.11 Set-up

3-55 3.7.4.1.12

RESERVED

3-55 3.7.4.1.13 Calibration of SLS

3-55 3.7.4.1.13.1 Calibration Verification

3-55 3.7.4.1.13.2 Calibration Adjustment

3-55 3.7.4.1.14

RESERVED

3-56 3.7.4.1.14.1

RESERVED

3-56 3.7.4.1.14.2

RESERVED

3-56 3.7.4.2 Contingency T2 Subject Loading device (SLd) performance characteristics

3-56 3.7.4.2.1 Load Range

3-56 3.7.4.2.2 Load Increments

3-56 3.7.4.2.3 Load Adjustment

3-56 3.7.4.2.4 Total Static Load Accuracy

3-56 3.7.4.2.5 Total Dynamic Load Accuracy

3-56 3.7.4.2.6 Subject Loading Device (SLD) Displacement

3-57 3.7.4.2.6.1 Vertical Displacement

3-57 3.7.4.2.6.2 Mediolateral Displacement

3-57 3.7.4.2.6.3 Anterior/Posterior Displacement

3-57 3.7.4.2.7 Static Load Difference between Fore and Aft, and Left and Right

3-57 3.7.4.2.8 Rate of Change of Load

3-57 3.7.4.2.9 Load due to Vertical Displacement of Spring

3-57 3.7.4.2.10 Set-up

3-58 3.7.4.2.11

RESERVED

3-58 3.7.4.2.12 Calibration of Contingency SLD

3-58 3.7.4.2.12.1 Calibration Verification

3-58 3.7.4.2.12.2 Calibration Adjustment

3-58 3.7.4.2.13

RESERVED

3-58 3.7.4.2.13.1

RESERVED

3-58 3.7.4.2.13.2

RESERVED

3-58 3.7.5 Avionics Element

3-58 3.7.5.1 T2 Control Panel

3-58 3.7.5.1.1 Crewmember Log-In and User Authentication

3-58 3.7.5.1.2 Exercise Initiation

3-58 3.7.5.1.3

RESERVED

3-58 3.7.5.1.4 Menu Options

3-58 3.7.5.1.4.1 Extension of Exercise Session

3-58 3.7.5.1.4.2 Manual Exercise control

3-59 3.7.5.1.4.3 Manual speed/resistance control

3-59 3.7.5.1.4.4 Manual restraint force control

3-59 3.7.5.1.4.5 Cool-down

3-59 3.7.5.1.4.5.1

RESERVED

3-59 3.7.5.1.4.5.2

RESERVED

3-59 3.7.5.1.4.5.3

RESERVED

3-59 3.7.5.1.5 Data Display

3-59 3.7.5.1.5.1 Exercise Progress

3-59 3.7.5.1.5.2 Exercise Progress in Pictograph Form

3-60 3.7.5.1.5.3 Completion Status

3-60 3.7.5.1.5.4

RESERVED

3-60 3.7.5.1.5.5

RESERVED

3-60 3.7.5.1.5.6

RESERVED

3-60 3.7.5.1.6

DELETED

3-60 3.7.5.1.6.1

DELETED

3-60 3.7.5.1.6.2

DELETED

3-60 3.7.5.1.7 Data Acquisition

3-60 3.7.5.1.7.1 Retrieve Uplinked Data

3-60 3.7.5.1.7.2

RESERVED

3-60 3.7.5.1.7.3 Data Indexing

3-60 3.7.5.1.7.4 Data Synchronizing

3-60 3.7.5.1.7.5 Primary and Secondary Method of Downloading Data

3-61 3.7.5.2 Avionics Data

3-61 3.7.5.2.1 User Interface, Ground Control

3-61 3.7.5.2.2 Foot Impact Force Measurements

3-61 3.7.5.2.3 Calibration of foot impact force

3-61 3.7.5.2.3.1 Calibration Verification

3-61 3.7.5.2.3.2 Calibration Adjustment

3-61 3.7.5.3 CHeCS Heart Rate Monitor (HRM)

3-62 3.7.5.3.1 Heart rate monitor Reception

3-62 3.7.5.4 Indicators

3-62 3.7.5.4.1 Treadbelt Movement Alerts

3-62 3.7.5.4.2

RESERVED

3-63 4.0 Ground Support Equipment (GSE)

4-1 4.1 Rack-level GSE requirements

4-1 4.1.1 GSE interfaces

4-1 4.1.1.1 KSC gse rack insertion device interface

4-1 4.1.1.2 rack shipping containers interface

4-1 4.1.1.3 rack handling adapters interface

4-1 4.1.1.4 ground transport accelerations

4-1 4.2 Subrack GSE

4-1 5.0

PREPARATION FOR DELIVERY

5-1 5.1 Preservation

5-1 5.1.1 General preservation requirements

5-1 5.2 Packing

5-1 5.2.1 General packing requirements

5-1 5.2.2 Detailed packing requirements

5-1 5.3 Marking and labeling

5-1 5.3.1 General marking and labeling requirements

5-1 5.3.1.1 Unit packages, intermediate packages and exterior shipping containers

5-1 5.3.1.2 Hazardous materials

5-1 5.3.2 Detailed marking and labeling requirements

5-2

APPENDIX

A acronyms and abbreviations

A-1

B glossary

B-1

C open work

C-1

D 2006 mmop protocol tracebility matrix

D-1

TABLE

3-103.2.1.5.2.1-1 measurement accuracy, sample rate, and storage

3.2.5.11.1-1 Operating vibration environment

3-19 3.2.5.11.2-1 non-operation vibration environment (rack mounted)

3-19 3.2.5.11.2-2 non-operation vibration environment (soft-stowed)

3-19 3.2.5.12.1-1 operating acoustic environment

3-20 3.2.5.12.2-1 non-operating acoustic environment

3-20 3.2.5.13.2-1 t2 system non-operating acceleration environment

3-21 3.2.5.13.2-2 t2 treadmill element non-operating acceleration environment

3-21 3.3.10.2-1 Noise Limits for Continuous Operation (or use)

3-39 C-1 to be determined items

C-1 C-2

TO BE RESOLVED ISSUES

C-1 D.1-1 2006 MMOP Protocol traceability matrix

D-1 E.1-1 JPR 8080.5 design requirements section

E-1 E.1-2 definitions of provider-specific implementation of applicable jpr 8080.5 standards

E-7

FIGURE

3-13.1.1 t2 functional diagram

3.1.8.3-1 PFE Discharge

3-5 3.1.8.5-1 Pressure Relief Devices

3-6 3.7.5.3.1-1 T2 HRT Reception range

3-62

1.0 introduction

1.1 purpose

This specification defines the functional and performance requirements for the International Space Station (ISS) Second Treadmill (T2).

1.2 scope

This specification establishes the performance, design and development of the T2 to be delivered and installed on orbit. Paragraph 3.2.1 performance requirements herein are applicable during nominal operations and do not account for maintenance or contingency events. This specification is applicable to the DD 250 configuration of the T2.

Verification methods and success criteria are defined in JSC 63934, Verification and Validation Document: Plan and Report for the Second Treadmill (T2) System GFE.

1.3 responsibility and change authority

The change authority for this document will be with the International Space Station (ISS) Program Office Multilateral Vehicle Control Board (MVCB). Any waivers or deviations to this specification must be approved by the MVCB.

1.4 verb application

The following definitions differentiate between requirements and other statements.

2.0 documents

2.1 applicable documents

2.1.1 government documents The following specifications, standards, and handbooks of the exact issue shown form a part of this specification to the extent specified herein. Other documents or portions thereof cited from within the applicable documents shall be considered to be for guidance and information only. In the event of a conflict between the documents referenced herein and the contents of this specification, the contents of this specification shall be considered a superseding requirement.

SPECIFICATIONS

JPR 5322.1,

Rev. F, February 2005 Contamination Control Requirements Manual

JPR 8080.5,

Rev. A, March 15, 2005 JSC Design and Procedural Standards Manual

JSC 20793

Rev. B.

Manned Space Vehicle Battery Safety Book

JSC 25863,

Rev. A, August 28, 1998 Fracture Control Plan for JSC Flight Hardware

JSC 27260,

Rev. D, May 2002 Decal Process Document and Catalog

JSC 27301,

Rev. E, November 2005 Material Control Plan for Johnson Space Center (JSC) Flight Hardware

JSC 61360,

Rev. A, July 28, 1998 Engineering Directorate Certified Parts Approval Process (EDCPAP)

JSC 63745,

Basic, May 2007 T2 Project Management Plan

KPL-PLN-50007,

Basic, December 1, 2005 KSC Payload Facility Contamination Control Requirements Plan

MSFC-DWG-20M02540,

May, 1973 Assessment of Flexible Lines for Flow-Induced Vibration

NASA TM-4511

Initial Release 08/01/09 Terrestrial Environment (Climactic) Criteria Guidelines for Use in Aerospace Vehicle Development

NASA TM-102179

Selection of Wires and Circuit Protective Devices for STS Orbiter Vehicle Payload Electrical Circuits

NPR 6000.1,

Rev. G, March 28, 2005 Requirements for Packaging, Handling, and Transportation Systems, Equipment and Associated Components

NSTS 1700.7

Rev B, December 1995 Safety Policy and Requirements for Payloads Using the International Space Station

NSTS 21000-IDD-ISS,

Rev. A, February 18, 1998 Shuttle Orbiter/International Space Station Interface Definition Document

NSTS 37329,

Rev. B, January 2001 Structural Integration Analyses Responsibility Definition for Space Shuttle Vehicle and Cargo Element Developers

PRC 9002

Rev. H, May 2007 Process Specification for Part Marking

SN-C-0005,

Rev. D, July 20, 1998 Space Shuttle Contamination Control Requirements

SSP 30233,

Rev. G, November 15, 2004 Space Station Requirements for Materials and Processes

SSP 30237,

Rev. H, March 15, 2005 Space Station Electromagnetic Emission and Susceptibility Requirements

SSP 30240,

Rev. F, July 30, 2005 Space Station Grounding Requirements

SSP 30242,

Rev. G, July 25, 2003 Space Station Cable/Wire Design and Control Requirements for Electromagnetic Compatibility

SSP 30243,

Rev. H, July 30, 2005 Space Station Requirements for Electromagnetic Compatibility

SSP 30245,

Rev. H, July 30, 2005 Space Station Electrical Bonding Requirements

SSP 30257:004

Rev. E, November 22, 1996 Space Station Program Intravehicular Activity Restraints and Mobility Aids Standard Interface Control Document

SSP 30309

Rev. E, October 28, 1994 Safety Analysis and Risk Assessment Requirements Document

SSP 30312

Rev. J, September 8, 2004 Electrical, Electronic, and Electromechanical (EEE) Parts Management and Implementation Plan for the Space Station Program

SSP 30482, Vol. 1, Rev. C, July 7, 1997 Electrical Power Specifications and Standards, Vol. 1: EPS Electrical Performance Specifications

SSP 30512,

Rev. C, June 3, 1994 Space Station Ionizing Radiation Design Environment

SSP 30558,

Rev. C, August 24, 2001 Fracture Control Requirements for Space Station

SSP 30559,

Rev. C, September 29, 2000 Structural Design and Verification Requirements

SSP 30573,

Rev. D, September 29, 2007 Space Station Program Fluid Procurement and Use Control Specification

SSP 41017, Part 1, Rev. F, January 31, 2002 Rack to Mini-Pressurized Logistics Module Interface Control Document, Part 1

SSP 41017, Part 2, Rev. H, May 6, 2002 Rack to Mini-Pressurized Logistics Module Interface Control Document, Part 2

SSP 41172,

Rev. W, June 30, 2005 Qualification and Acceptance Environmental Test Requirements

SSP 50005,

Rev. E, June 30, 2006 International Space Station Flight Crew Integration Standard (NASA-STD-3000/T)

SSP 50007,

Rev. C, November 2004 Space Station Inventory Management System Bar Code Label Requirements and Specification

SSP 50014,

Rev. B, September 3, 1997 International Space Station Utility Coding Specification

SSP 50021,

Initial Release, December 12, 1995 Safety Requirements Document

SSP 50036,

Rev. C, April 15, 2003 Microgravity Control Plan

SSP 50038,

Rev. B, November 17, 1995 Computer Based Control System Safety Requirements

SSP 50251, Part 2, Rev. B, May 30, 2003 ARIS to Pressurized Element Interface Control Document

SSP 50254,

Rev. K, May 2005 Operations Nomenclature

SSP 50290,

Rev. E, February 23, 2007 Prime Item Development Specification for Node 2

SSP 50318,

Rev. F, October 5, 2006 Prime Item Development Specification for Node 3

SSP 50470,

Rev. C, October 2007 Crew Health Care System (CHeCS) Specification

SSP 50783,

Baseline, October 2005 Labeling of Intravehicular International Space Station (ISS) Hardware: Design Development Process

SSP 50827,

Baseline, June 2008 Second Treadmill (T2) to Nodes Interface Control Document (ICD)

SSP 52005,

Rev. C, December 18, 2002 Payload Flight Equipment Requirements and Guidelines for Safety-Critical Structures

SSP 57011,

Rev. A, March 30, 2001 Payload Verification Program Plan ISS Program

SSP 52051-01, Rev. A, September 1, 2005 User Electric Power Specifications and Standards: 120Vdc Loads

STANDARDS

NASA

NASA-STD-8739-1,

August 1999 Workmanship Standard for Staking and Conformal Coating of Printed Wiring Boards and Electronic Assemblies

NASA-STD-8739-2,

August 1999 Surface Mount Technology

NASA-STD-8739-3,

Change 2, January 2001 Soldered Electrical Connections

NASA-STD-8739-4,

February 1998 Crimping, Interconnecting Cables, Harness, and Installation

MILITARY AND OTHER

FED-STD-595

Federal Standard Colors Used in Government Procurement

MIL-STD-129

Rev. P, October 29, 2004

Marking for Shipment and Storage

MIL-STD-130

Rev. M, December 2, 2005 Identification Marking of US Military Property

MIL-STD-810

Rev. F, January 1, 2000 Environmental Test Methods and Guidelines

MIL-STD-1472

Rev. F, August 23, 1999 Human Engineering Design Criteria for Military Systems Equipment and Facilities

MIL-STD-2073-1

Rev. D, December 15, 1999 Department of Defense Material Procedures for Development and Application of Packaging Requirement

MIL-STD-2073-2,

December 15, 1999

Packaging Requirement Codes

ANSI/ESD S20.20-1999

Electrostatic Discharge Control

HANDBOOKS

MILITARY

MIL-HDBK-17

Rev. F, June 17, 2002 Polymer Matrix Composites Guidelines, Vol. 1

(Unless otherwise indicated, copies of federal and military specifications, standards, and handbooks are available from the Standardization Documents Order Desk, Building 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.)

2.1.2 non-government documents

The following documents of the exact issue shown form a part of this specification to the extent specified herein. Other documents or portions thereof cited from within the applicable documents shall be considered to be for guidance and information only. In the event of a conflict between the documents referenced herein and the contents of this specification, the contents of this specification shall be considered a superseding requirement.

OTHER PUBLICATIONS

ASTM F 2115-01

October 2001 Standard Specification for Motorized Treadmills

ASTM F 2106-01

September 2001 Standard Test Methods for Evaluating Design and Performance Characteristics of Motorized Treadmills

(Non-government standards and other publications are normally available from the organizations that prepare or distribute the documents. These documents also may be available in or through libraries or other informational services.)

2.2 reference documents The following documents are reference documents utilized in the development of this specification. These documents do not form a part of this specification, and are not controlled by their reference herein.

CFR Title 49 October 1, 2004 Code of Federal Regulations, Title 49, Transportation

JSC 63934,

Baseline, April 2008 Verification and Validation Document: Plan and Report for the Second Treadmill (T2) System GFE

SSP 57000,

Rev. G, September 2004 Pressurized Payloads Interface Requirements Document (Paragraphs Referenced: 3.2.3.1B, 3.2.3.3, 3.2.5.1.1, 3.2.5.1.2, 3.5.1.2.B, 3.5.1.8, 3.5.1.10, 3.5.1.11, 3.12.4.2.8.4, 3.12.6.3, 3.12.6.4.1, 3.12.6.4.3)

3.0 requirements

This section defines the minimum requirements the flight items must meet.

3.1 definition

The T2 system is an exercise device used to compensate for the negative influence of microgravity on the crewmembers. The treadmill is designed to allow walking and running exercises in a zero gravity environment for maintenance of cardiovascular fitness, muscular strength and the exercise of neurophysiological pathways and reflexes required to walk upon return to the earth. The T2 is also designed to minimize the transfer of dynamic forces caused by the operation of the treadmill so as not to disturb the microgravity environment of the ISS or impart excessive loads into the space station structure.

3.1.1 diagrams

Figure 3.1.1 is a functional diagram of the T2 system showing the relationships to the ISS and other components. It should not be interpreted as accurately representing the physical locations of the interfaces between Nodes 2 and 3, and the T2 components.

figure 3.1.1 t2 functional diagram

3.1.2 interface definition

3.1.2.1 ISS interfaces

Interfaces between the T2 System and ISS are documented by SSP 50827, Second Treadmill (T2) to Nodes Interface Control Document (ICD).

3.1.2.2 human interfaces All human interfaces of the T2 System are considered to fall within the realm of functional and/or performance characteristics, and are defined in the sections below.

3.1.3 major components list

The T2 System comprises the following major components:

A.

Commercial Off-The-Shelf (COTS) Treadmill In accordance with Space Station Change Notice (SSCN) 010318, the treadmill element of T2 is a COTS device, provided by Woodway United States of America (USA) to act as the fundamental exercise platform and primary crew interface of the T2 system. It will be developed as a subsystem and will have its own specification and design milestones in order to assure that this key element of the system captures and meets its requirements (e.g. medical, operational, environmental, etc.) At the completion of the treadmill manufacturing, assembly and certification, the treadmill will be integrated with the rest of the system.

B.

Modified International Standard Payload Rack (ISPR) In accordance with SSCN 010318, an ISPR will be incorporated as the major structural element of T2. It will utilize an existing flight composite ISPR. The design will leverage the structural reinforcement designs and modifications made to Bioastronautics Muscle Atrophy Research and Exercise System (MARES) ISPR as the baseline structural design element, to use the ISPR as the mounting foundation for the treadmill, Vibration Isolation System (VIS), Subject Loading System (SLS) and Avionics Elements.

C.

Vibration Isolation System (VIS) In accordance with SSCN 010318, a modified Passive Rack Isolation System (PaRIS) will be utilized to perform the functions of the VIS element. The PaRIS vibration isolation element is Boeing-provided hardware that allows the ISPR to be isolated from the ISS structure and mitigates microgravity disturbance transmission of crew-induced loads from exceeding the T2 allocated levels of disturbance and degrading the microgravity environmental goals for the conduct of microgravity science in the rest of the host module and the vehicle. It will launch partially as Rack-installed parts, and partially as stowed items. After launch and prior to the installation into the appropriate ISS Module location, the PaRIS hardware will be integrated by the crew onto the treadmill integrated rack element and activated after installation.

D.

Subject Loading System A Subject Loading System (SLS) is required to restrain a running astronaut to the treadmill’s running surface in an approximation of gravity. In accordance with SSCN 010318, an SLS to be developed by European Space Agency (ESA) will also be integrated to the Second Treadmill System integrated rack operational element. An Interface Definition Document (IDD) between the SLS and Second Treadmill System integrated rack will be required. Due to ESA schedule concerns, the full complement of SLS requirements documented in paragraph 3.2.1 will not be met with the initial launch configuration, and a contingency, unpowered SLS will be developed for the initial launch of the T2 System.

E.

Avionics Element The requirement for an avionics element is not specifically delineated by SSCN 010318. However, the requirement to include and develop one is derived from other requirements of SSCN 010318.

· A power redistribution component to receive vehicle power and allocate it to the powered elements of the T2 system is required.

· Instrumentation to measure T2 system performance, health and status is required.

· A data distribution system to collect the instrumentation data, time-synchronize it, and facilitate its transmission to the ground is required. A user-operated control panel to act as the primary crew interface, including uplink of prescribed exercise profiles and downlink of exercise results using the ARED Pacebook is outlined in SSCN 010318, but the Pacebook does not itself provide a means of integrating all of the analog and digital signals required. Uplink and downlink require availability of a wireless LAN in the resident location.

· A cooling system to reject the heat generated by the T2 system powered components back to the Moderate Temperature Loop (MTL) is required.

The avionics element approach will be to use hardware that has already been certified where possible, and to leverage on-going and existing designs to the fullest extent where pre-certified hardware is not available.

3.1.4 government furnished materials

Government Furnished Equipments (GFE) A.

COTS Treadmill B.

ISPR

C.

Contingency Subject Loading System D.

Avionics Element 1.

Pacebook Computer 2.

Power Supplies 3.

Avionics Air Assembly 4.

Solid State Power Control Module

3.1.5 contractor furnished materials

Contractor Furnished Equipments (CFE)

· Modified PaRIS.

3.1.6 International Partner furnished materials

International Partner Furnished Equipment

· Subject Loading System.

3.1.7 MPLM interfaces

3.1.7.1 mplm structural attach points interface

The T2 system, including both the integrated and empty rack, shall interface to the MPLM structural attach points in accordance with SSP 41017, Rack to Mini-Pressurized Logistics Module Interface Control Document, Part 2, paragraph 3.1.1.

3.1.7.2 attach points loads

The T2 system, including both the integrated and empty rack, shall be limited to producing interface attach point loads less than or equal to those identified by SSP 41017 Part 1, paragraph 3.2.1.4.3, based upon an acceleration environment as defined in SSP 41017 Part 1, paragraph 3.2.1.4.2.

3.1.8 rack requirements

3.1.8.1 modal frequency

The T2 system and knee brace shall have a modal frequency in accordance with SSP 52005, Payload Flight Equipment Requirements and Guidelines for Safety-Critical Structures, paragraph 5.7, second paragraph for launch and landing, based on rigidly mounting the integrated rack in the launch configuration.

3.1.8.2 keep-out zone

The T2 system shall comply with the keepout zone for rack pivot mechanism as defined in SSP 41017 Part 1, paragraph 3.2.1.1.2.

3.1.8.3 Portable Fire Extinguisher (pfe) discharge

The T2 system and rack equipment that have PFE access ports shall maintain positive margins of safety when exposed to the PFE discharge rate given in Figure 3.1.8.3-1, PFE Discharge.

Figure 3.1.8.3-1 PFE Discharge

3.1.8.4 rotation restraints

The T2 system shall use the rack and crew restraints identified in SSP 30257:004, Space Station Program Intravehicular Activity Restraints and Mobility Aids Standard Interface Control Document, (for example, the 14 inch fixed length tether and the 71 inch adjustable length tether) to secure the rack in these rotated positions for payload operations and maintenance.

3.1.8.5 pressure relief devices

The T2 system shall not have a pressure relief device on the front of the rack except for pressure relief devices that are only used to minimize the pressure differential across an enclosed volume due to changes in the normal cabin operating pressure as defined in Figure 3.1.8.5-1, Pressure Relief Devices.

Figure 3.1.8.5-1 Pressure Relief Devices

3.1.8.6 On-orbit keep-out zone

The T2 system shall comply with the on-orbit keep-out zone as defined in SSP 50827, paragraph 3.2.1.1.2.

3.1.8.7 Mass properties

3.1.8.7.1 Launch/landing/ground handling mass

The mass of the integrated T2 rack for launch/landing/ground handling shall be less than or equal to 804.2 kg (1773 lbs).

Source:

SSP 41017, Part 1, Revision F, paragraph 3.2.1.2.1

3.1.8.7.2 On-orbit mass

The integrated T2 Rack on−orbit shall have a maximum mass, which does not exceed 1067.8 kg (2,354 lbs) as defined in SSP 50827, paragraph 3.2.1.2.1.

3.2 Characteristics

3.2.1 functional performance characteristics

3.2.1.1 Provide exercise platform

3.2.1.1.1 crew exercise capability

The T2 system shall provide walking and running exercise capability.

Source:

Multilateral Medical Operations Panel (MMOP) February 2006 Protocol (Reference appendix C for traceability matrix)

Note:

MMOP protocol calls out stationary exercise. This requirement was omitted per SSCN 010318

3.2.1.1.2 modes of operation

The T2 system shall provide two powered modes of exercise operation: an active mode offering variable speed, and a passive mode offering variable resistance. The T2 system will provide an unpowered mode offering only the friction intrinsic to the sum of exercise machine’s moving parts. Unpowered mode is defined by the removal of power to the treadmill element only, and does not preclude power to other T2 system subcomponents or the integrated rack.

Source:

MMOP February 2006 Protocol (Reference appendix C for traceability matrix)

Note:

Note protocol calls out stationary exercise. This requirement was omitted per SSCN 010318

3.2.1.1.3 configuration time

The T2 system shall allow a crewmember to configure the device for nominal (powered) exercise configuration in less than 10 minutes from the untended or stowed configuration, or from any other exercise configuration.

Source:

MMOP February 2006 Protocol (Reference appendix C for traceability matrix)

Note:

This requirement is applicable for the configuration the T2 is left in between users, not the initial launch stowed configuration.

3.2.1.1.4 configuration resources

The T2 system shall require only one crewmember to configure and operate it for exercise after initial installation and check-out.

Source:

MMOP February 2006 Protocol (Reference appendix C for traceability matrix)

3.2.1.1.5 treadbelt start up

DESIGN GOAL: The T2 system should minimize crew actions necessary to initiate treadbelt movement to begin an exercise session.

Source:

MMOP February 2006 Protocol (Reference appendix C for traceability matrix)

3.2.1.1.6 time controlled stages

The T2 system shall permit exercise to be performed in a series of time-controlled stages, where each stage consists of a constant crew restraint load and either constant speed (for active mode) or constant resistance (in passive mode) during that time.

Source:

MMOP February 2006 Protocol (Reference appendix C for traceability matrix)

3.2.1.1.7 Reserved

3.2.1.1.8 Reserved

3.2.1.1.9 Reserved

3.2.1.2 Isolate ISS structure from exercise-induced vibrations

3.2.1.2.1 Limit microgravity disturbances

The T2 system shall provide a means of attenuating the crew-induced vibration due to running from transmission to the ISS structure. Refer to SSP 50827, paragraph 3.2.1.12 for limits and frequency spectrum.

Rationale:

Not explicitly stated in MMOP protocol, but derived from the protocol appendix C ‘Roles & Responsibilities’ listing

3.2.1.2.2 stabilize running surface

The T2 system will provide a means of stabilizing the vibration-isolated platform.

Rationale:

Not explicitly stated in MMOP protocol, but derived from the protocol appendix C ‘Roles & Responsibilities’ listing

3.2.1.3 Restrain an exercising crewmember

3.2.1.3.1 restraint mechanism

The T2 system shall provide a means of restraining an exercising crewmember to the running surface by means of a physical device that joins the T2 structure to the current ISS Treadmill Harness p/n SEG46120250-30X worn by the runner.

Source:

MMOP February 2006 Protocol (Reference appendix C for traceability matrix)

3.2.1.3.2 configuration of restraint mechanism

The T2 system crew restraint mechanism shall originate from two points on the T2 System, one to the left and one to the right of the runner.

Source:

MMOP February 2006 Protocol (Reference appendix C for traceability matrix)

3.2.1.4 monitor and measure human performance

3.2.1.4.1 heart rate

The T2 system shall provide a means of acquiring an exercising crewmember’s heart rate from the ISS CHeCS-provided Heart Rate Monitor.

Source:

MMOP February 2006 Protocol (Reference appendix C for traceability matrix)

3.2.1.4.2 reserved

3.2.1.5 control, display and distribute data

3.2.1.5.1 programmed exercise protocols

The T2 system shall have the capability to operate from a pre-programmed protocol.

Source:

MMOP February 2006 Protocol (Reference appendix C for traceability matrix)

3.2.1.5.1.1 programmed exercise individualization The T2 system pre-programmed prescriptions shall be individualized for each crewmember.

Source:

MMOP February 2006 Protocol (Reference appendix C for traceability matrix)

3.2.1.5.1.2 programmed exercise protocol uplink

The T2 system shall upload pre-programmed exercise prescriptions through the Ops LAN without direct crew interaction.

Source:

MMOP February 2006 Protocol (Reference appendix C for traceability matrix)

3.2.1.5.1.3 reserved

3.2.1.5.2 exercise session results

3.2.1.5.2.1 measure performance parameters

The T2 system shall measure the parameters shown in Table 3.2.1.5.2.1-1, with the measurement accuracy, precision and data storage rate as defined in the table.

table 3.2.1.5.2.1-1 measurement accuracy, sample rate, and storage

Avg. of every 5 seconds

Minimum of 30 sec/stage after initial 15 seconds.

Minimum of 30 sec/stage after initial 15 seconds.

Source:

MMOP February 2006 Protocol (Reference appendix C for traceability matrix) Note:

Heart rate measurement accuracy is defined as the difference between the received wireless heart rate signal and the heart rate value recorded in the T2 data output file. The Heart Rate transmitter, P/N SEG52101060-301, lies outside of the T2 System, and verification of the accuracy of the transmitted signal with regard to the runner’s actual heart rate is not within the scope of the T2 System.

3.2.1.5.2.2 record performance parameters The T2 system shall record the parameters shown in Table 3.2.1.5.2.1-1 in metric units with the parameter and the unit of each parameter clearly identified in the data files to a non-volatile storage media.

Source:

MMOP February 2006 Protocol (Reference appendix C for traceability matrix)

3.2.1.5.2.3 downlink performance parameters The T2 system shall provide a means to downlink the parameters shown in Table 3.2.1.5.2.1-1 to the ground without direct crew interaction.

Source:

MMOP February 2006 Protocol (Reference appendix C for traceability matrix)

3.2.1.5.2.4 reserved

3.2.1.5.2.5 reserved

3.2.1.5.3 engineering parameter DESIGN GOAL: The T2 system should monitor all available subsystem parameters and log parameters with a timestamp in a rotating log file for analysis. Parameters should be recorded at least every 10 seconds and saved for at least 2 weeks locally.

Note:

Logging of subsystem parameters is not considered a constraint to hardware certification or operational use.

3.2.1.6 control and redistribute electrical power The T2 system shall redistribute ISS-provided electrical power to…