STATEMENT OF WORK.pdf

SOW/SPECIFICATION

For

High Conductance Valve (HCV) Actuators

Contractor shall manage the delivery of the HCV actuator per Technical Performance table listed below.

Quantity see the Table.

Quality assurance and workmanship shall be in accordance with NASA contract # 80GSFC19C0022.

Delivery dates for EM 9 months after ATP, and for FM 16 months after ATP.

Mechanical interfaces per Drawing GSFC # 2315951

HCV Acuator Technical Requirements

Quantity of EM Qty2

Quantity of FM Qty 5

Motor Output Speed at Operating Point TBD

Motor Output Torque at Operating Point TBD

Gearhead Reduction 103:1 TBC

Gearhead Type Straight Planetary

Gearhead Efficiency TBD

Gearhead Output Speed at Operating Point*** 34 RPM

Gearhead Output Torque at Operating Speed (margined)****

1700 mNm

Torque Constant at Operating Point TBD

Operating Voltage Range 11 V

Maximum Current at Output Torque Requirement

< 1.2 A

Survival and Operational Key Temperature Range

-30 °C to +50 °C

Maximum Run-Time at Operational Temperature, Nominal Speed, Maximum Torque

< 15 seconds

Side Loading on Shaft None

Feedback Halls (non-redundant), Halls Sencors are

GFE

Expected Actuator Cycles at planetary gearhead output (Revs)

6.0 K

Lubrication PFPE based (i.e. Braycote)

3/20/2022 Rev B

Mission Assurance Same as DrACO motors

ICD Drawing #

External Conductor Spec MIL-W-22759/11 (AS22759/11 or M22759/11)

Conductor Length > 300 mm

Electrical Connector

No connector required. If a connector is installed for testing, it is acceptable to keep the connector installed on the assembly.

***Speed requirement includes margin