A demonstration of the use of generalized parity relations for detection and identification of instrument failures of a free-free beam
Abstract
A means of detecting failures in sensors and actuators on board large, flexible space structures is described. A failure detection and indentification (FDI) method which does not require triplication of position, attitude, and shape data is that of generalized parity relations. Parity relations are derived and an FDI routine is implemented on a computer-simulated flexible beam modeled on an experimental beam at NASA Langley Research Center. The effectiveness of the FDI procedure is relatively insensitive to disturbances and noise, but is very sensitive to modeling errors, including frequency errors, mode shape errors, and sensing and actuation spillover.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- September 1981
- Bibcode:
- 1981STIN...8133451M
- Keywords:
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- Computerized Simulation;
- Large Space Structures;
- System Failures;
- Actuators;
- Error Detection Codes;
- Parity;
- Sensors;
- Spacecraft Instruments;
- Instrumentation and Photography