Dual control vibration tests of flight hardware
Abstract
A vibration retest of a spacecraft flight instrument, the Mars Observer Camera (MOC), was conducted using extremal dual control to automatically limit the shaker force and notch the shaker acceleration at resonances. This was the first application of extremal dual control with flight hardware at JPL. The retest was successful in that the environment was representative of flight plus some margin, the instrument survived without any structural or performance degradation, and the force limiting worked very well. The test set-up, force limiting procedure, and test results are described herein. It is concluded that dual control should be utilized when there is a concern about overtesting in hard-base-drive tests and the instrumentation for force measurement and control is available. Recommendations for improving the implementation of dual control are provided as a result of this first experience.
- Publication:
-
Institute of Environmental Sciences, 37th Annual Technical Meeting
- Pub Date:
- 1991
- Bibcode:
- 1991iesa.meet...68S
- Keywords:
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- Flight Instruments;
- Hardware;
- Spacecraft Instruments;
- Vibration Damping;
- Vibration Tests;
- Automatic Control;
- Cameras;
- Failure Analysis;
- Quality Assurance and Reliability