SATPC0035152 Tab 04 4 SOW.pdf

12/5/2023 Page 1 of 4

Benchmarking Angle Measurement Capability

Task Overview:

This task will be used is to benchmark accelerometer calibration services for tri-axis, orthogonal, accelerometers named Angle Measurement Systems (AMS). NASA maintains several AMS units to perform high precision leveling and angle checks to support ground test facility activities. AMS units are quoted to provide better than 0.01-degrees accuracy.

Government Provided Equipment:

• Tri-Axis QA-2000 head.

• Keithley 2001 Series 7.5 Digit Digital Multimeter with 2000-SCAN card and pre-terminated cables.

• Keithley 2230-30-1G Triple Output Power Supply.

Task Description:

• Design and fabricate mounting hardware to mount NASA tri-axis head to contractor calibration system. Plate shall be designed to align sensor dowel pin to calibration table within 10 arc-seconds. Reference NASA drawing 1238526-A for tri-axis head mechanical interfaces.

• Integrate NASA provided Keithley 2001 multimeter into contractor data system using GPIB interface and government provided code. Contractor’s data acquisition system shall be used to acquire and record the data noted in Data recording requirements. Wires shall not be reconfigured on the multimeter or power supply; a pre-terminated 19-Pin Nanonic will be provided attached to multimeter and power supply.

• Contractor shall install the Government’s tri-axis accelerometer to test apparatus. The calibration plate shall be aligned to the table axis system within ±10 arc seconds for each axis.

• Contractor shall perform a platform stability test by recording measurements once with motors active and another with brakes applied. Data shall be recorded for 2 minutes at each of the following angles twice, once with motors active and another with brakes applied:

Points Pitch Roll 1 0 0 2 5 0 3 0 5 4 5 5

• Contractor shall perform three (3) sensor calibrations as defined by the Test Schedule without removing sensor or calibration hardware from the table. Calibration shall be performed in exact order as defined by schedule.

• Contractor shall reinstall the sensor and calibration hardware to table and then complete one calibration set as defined by the attached schedule to demonstrate overall repeatability.

Data recording requirements:

• Sensor shall be warmed up for 3 hours prior to any data being recorded.

• Data shall be recorded after table has stabilized at set point, at least 5 seconds after movement.

• At each point in the schedule a reading shall record the following:

12/5/2023 Page 2 of 4 o Time and Date of recording, o Reading and Code identification, o Tri-axis sensor measurements (6 signals: 3 accelerometers and 3 temperatures), o Calibration table position readout (2 to 3 readings, i.e., pitch, roll, yaw, or acceleration vector), o Lab temperature and humidity.

Sensor Handling Requirements:

• Sensor shall not be disconnected with power supply on; power supply should be off when connecting and disconnecting sensor.

• Power supply shall only be set to 15 Volts for both channel 1 and 2.

• Sensor shall be handled with care to avoid drops or impacts.

• Sensor shall be shipped in provided pelican case secured by foam. Photo documentation shall be provided to document packing.

Deliverables:

• Raw and processed data at each angle position as noted in the experiment schedule.

• Photos and documentation of sensor alignment to table axis to illustrate installation accuracy.

Test Schedule:

Reading Pitch Roll Code Test 1 0 0 0 Level 2 -90 0 1 Warmup 3 90 0 1 Warmup 4 0 90 1 Warmup 5 0 -90 1 Warmup 6 0 -180 1 Warmup 7 0 0 0 Level

8 12 162 2 AMS

9 9 108 2 AMS

10 -12 54 2 AMS

11 21 72 2 AMS

12 18 126 2 AMS

13 -30 180 2 AMS

14 -24 -126 2 AMS

15 -3 -90 2 AMS

16 27 -108 2 AMS

17 30 -72 2 AMS

18 15 -144 2 AMS

19 6 -54 2 AMS

20 0 -36 2 AMS

21 -18 -18 2 AMS

22 3 18 2 AMS

23 -6 36 2 AMS

24 -15 0 2 AMS

12/5/2023 Page 3 of 4

Reading Pitch Roll Code Test

25 -9 -162 2 AMS

26 24 90 2 AMS

27 -27 144 1 AMS

28 0 0 0 Level

29 35 -45 3 CCD

30 0 -180 3 CCD

31 35 135 3 CCD

32 -35 -45 3 CCD

33 -35 -135 3 CCD

34 0 -90 3 CCD

35 0 90 3 CCD

36 0 -180 3 CCD

37 35 -135 3 CCD

38 -35 45 3 CCD

39 -90 0 3 CCD

40 90 0 3 CCD

41 0 -90 3 CCD

42 35 -135 3 CCD

43 35 45 3 CCD

44 -35 135 3 CCD

45 35 135 3 CCD

46 0 0 0 Level 47 5 0 4 Pitch 48 10 0 4 Pitch 49 15 0 4 Pitch 50 20 0 4 Pitch 51 25 0 4 Pitch 52 30 0 4 Pitch 53 20 0 4 Pitch 54 10 0 4 Pitch 55 5 0 4 Pitch 56 0 0 4 Pitch 57 0 0 0 Level 58 0 5 5 Roll 59 0 10 5 Roll 60 0 15 5 Roll 61 0 20 5 Roll 62 0 25 5 Roll 63 0 30 5 Roll 64 0 20 5 Roll 65 0 10 5 Roll 66 0 5 5 Roll 67 0 0 0 Level

12/5/2023 Page 4 of 4

NASA Cable Pinout:

Nanonic Data System Description Pin Color Termination Notes/Secondary Termination +Power 1 Brown +Ch1 2230-30-1G +15V -Power 2 Red -Ch2 2230-30-1G -15V +Sig 3 Orange +Ch1 2001 Scan -Sig 4 Yellow -Ch1 2001 Scan +Temp 5 Green +Ch4 2001 Scan 1k Ohm Resistor to -Temp -Temp/Com 6 Blue -Ch4 2001 Scan -Ch1 & +Ch2 2230-30-1G* +Power 7 Violet +Ch1 2230-30-1G -Power 8 Gray -Ch2 2230-30-1G +Sig 9 White +Ch2 2001 Scan -Sig 10 Black -Ch2 2001 Scan +Temp 11 Brown +Ch5 2001 Scan 1k Ohm Resistor to -Temp -Temp/Com 12 Red -Ch5 2001 Scan -Ch1 & +Ch2 2230-30-1G* +Power 13 Orange +Ch1 2230-30-1G -Power 14 Yellow -Ch2 2230-30-1G +Sig 15 Green +Ch3 2001 Scan -Sig 16 Blue -Ch3 2001 Scan +Temp 17 Violet +Ch6 2001 Scan 1k Ohm Resistor to -Temp -Temp/Com 18 Gray -Ch6 2001 Scan -Ch1 & +Ch2 2230-30-1G* Ground 19 White GND 2230-30-1G

*-Ch1 and +Ch2 of 2230-30-1G is to be bonded to provide a common and +/-15V to sensor.