Flight test results of the inertial upper stage redundant inertial measurement unit redundancy management technique

Details Flight test results of the inertial upper stage redundant inertial measurement unit redundancy management technique Flight test results of the inertial upper stage redundant inertial measurement unit redundancy management technique

Jan 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984aiaa.meetw....g&link_type=abstract

American Institute of Aeronautics and Astronautics, Aerospace Sciences Meeting, 22nd, Reno, NV, Jan. 9-12, 1984. 7 p.

Computer Science

Performance

Airborne/Spaceborne Computers, Flight Tests, Inertial Upper Stage, Redundant Components, Space Transportation System Flights, Challenger (Orbiter), Error Analysis, Preflight Analysis, Titan Launch Vehicles

Scientific paper

Inertial Upper Stage (IUS) vehicles have been deployed once from a Titan T-34D booster and once from Space Shuttle Challenger to carry spacecraft to geosynchronous orbit. Telemetry data have been analyzed showing the performance of the failure detection and isolation scheme for the redundant inertial measurement unit (RIMU). On the T-34D flight, no built-in test failure events occurred and no failure detection thresholds were exceeded for as long as telemetry was available. On the Space Shuttle flight, considerable failure detection activity took place during which the RIMU indicated continuous proper navigation functioning until gyro maximum rates were exceeded. Adjustments to the algorithm and additional pre-flight tests should reduce the undesired activity while preserving performance on subsequent flights.

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