Calibration Workstation Requirement Document.pdf

Angular Rate Accelerometer Calibration Workstation For

704th Test Group/846th Test Squadron

3 Aug 2023

1.0 Purpose

The 704th Test Group (704 TG) mission is to be the premier provider of unique test and evaluation capabilities relevant to tomorrow’s warfighter through world-class people improving technical excellence, cost-effectiveness, and agility. The 846th Test Squadron

(846 TS) is one of the units assigned to the 704 TG. The 846 TS’s primary test capability is the Holloman High Speed Test Track (HHSTT) where rocket powered sled trains are utilized to simulate flight-like environments and scenarios with the control and recovery of a ground-based system. Calibrated sensors are requred in order to collect data from these systems. Calibrated sensors are required for test mission validation of various avionics platforms, payloads, and equipment for the Department of Defense in conjunction with its partners over a number of differing rocket sled configurations. Approximately 90% of the sensors used at 846 TS are either angular rate or acceleration based and must be sent out to commercial calibration vendors for each mission. The following requirements are for a new combined angular rate/accelerometer calibration workstation needed at the track.

2.0 Scope

The Contractor shall deliver one angular rate - accelerometer calibration workstation to include on-site assembly and training for personnel. The workstation needs to meet the following requirements:

2.1 Workstation Specifications

• Turnkey system with PC, keyboard, mouse & monitor.

• Windows PC-based user interface with calibration & database software.

• System includes dynamic rotation exciter with internal reference standard angular rate transducers, vibration shaker with internal reference standard accelerometer, and data acquisition hardware.

• 19” rack mountable workstation for system electronics with mounting hardware and required cabling.

• Calibrated temperature and humidity data automatically included in sensor calibration data and certificates.

• Angular rate & accelerometer sensor calibration support.

• Calibration standard traceable to NIST or comparable alternative.

• Calibration method standards applicable to ISO 16063 – 21 and ISO 17025.

• System input power requirement 115V / 230V at 50Hz / 60 Hz.

2.2 Software Specifications

• Supports stepped sine at up to 200 user definable frequencies and amplitudes.

• User interface available in English language.

• Clearly defined pass/fail criteria for each sensor type.

• Includes input and output impedance measurements.

• Provides calibration data management.

• Reports calibration data in imperial or metric units.

• Retrieve and archive calibration data in SQL compliant database.

• Database of sensor specifications and test requirements.

• Printed calibration certificates comply with ISO 17025 and ISO 16063-21 requirements.

2.3 Dynamic Rotation Exciter Specifications

• Torque, max. (sine peak): 0.95 Nm

• Frequency range: 1Hz to 5kHz

• Angle, max. (peak – peak): 30°

• Angular velocity, max. (sine peak): 5300°/s

• Angular acceleration, max. (sine peak): 2,5000,000°/s2

• Mass moment of inertia of bare table: 22 kg at mm2

• Mass moment of inertia of payload, max.: 400 kg at mm2

• Maximum payload: ≥ 0.5 kg

• Maximum centrifugal force due to unbalance: 1.5 N

• Maximum Payload: ≥ 0.5 kg

• Tranverse acceleration: 1Hz to 600Hz < 0.2 m/s2/(°/s); 600Hz to 5kHz < 2 m/s2/(°/s)

• Total harmonic distortion (angular velocity): 1Hz to 6Hz < 10%; 6Hz to 5kHz < 3%

• Stray magnetic field: ≤ 0.1 mT on mounting table

• Mounting table size: 50 mm

• Temperature range for operation: 5 to 40° Celsius

• Temperature range for storage and transportation: -25 to 55° Celsius

2.4 Angular Rate Reference Standard Transducers

• Certification: NIST Standard or comparable alternative

• Angular velocity ranges: 1,500°/s & 8,000°/s (peak)

• Sensitivity (± 5%): .25 mV/(°/s) @ 1,500°/s & 1.33 mV/(°/s) @ 8,000°/s

• Frequency Range: 0Hz to 2kHz

2.5 Vibration Shaker Specifications

• Accelerometer Types Supported: Piezeoresistive, IEPE & Charge Mode

• Force rating, max, (sine-peak): 95 N

• Calibration Frequency Range: 3 Hz to 20 kHz

• Acceleration, max. (sine-peak): 600 m/s2

• Displacement, max.: 10 mm

• Maximum payload: 2kg (vertical); 1kg (horizontal)

• Transverse motion, typical: < 5%

• Temperature range (in operation): -20 to 80° Celsius

• DUT mounting options:

o 50 mm coupling surface diameter o ¼-28 UNF thread hole o (3) 10-32 UNF thread holes

• Stray magnetic field on table: < 3 mT

3.0 Documentation

An operation manual digital and hardcopy for the workstation will be provided.

4.0 Milestones

The contractor shall deliver, assemble, and provide training on the workstation no later than

15 weeks ARO.

5.0 Deliverables

The contractor shall deliver all hardware and documentation to 846 TS, Attn: Sennet Archie at 1521 Test Track Road, Holloman Air Force Base, New Mexico 88330-7850.

The contractor shall provide on-site installation of hardware & system training with 2 years of technical support.