DocumentCode :
3156426
Title :
Control with distributed sensing on a large flexible spacecraft
Author :
Montgomery, Raymond ; Ghosh, Dave
Author_Institution :
NASA Langley Res. Center, Hampton, VA, USA
fYear :
1990
fDate :
1-4 Apr 1990
Firstpage :
119
Abstract :
The effective use of optical instruments in vibration control systems on spacecraft are described. These instruments sense relative deflection between targets fixed to a spacecraft and a detector. A linear quadratic Gaussian design process is presented and applied to a large flexible ground test facility, the Mini-Mast, for validation. For the design, nine optical targets are used, and their signals are emulated with noncontacting position transducers. Three torque wheel actuators are used for damping augmentation. Results are dramatic, indicating an improvement in damping from 3% to 30% of critical. The tests prove the effectiveness of the procedure in designing vibration damping systems. Additionally, a linear quadratic Gaussian design using a larger number of targets is presented. It is proposed that for large numbers of closely spaced targets one should implement the average value of the gains between adjacent targets to reduce the sensitivity of the Kalman filter to an individual target output
Keywords :
aerospace control; optimal control; position measurement; space vehicles; vibration control; Kalman filter; Mini-Mast; damping augmentation; distributed sensing; ground test facility; large flexible spacecraft; linear quadratic Gaussian; noncontacting position transducers; optical instruments; relative deflection; torque wheel actuators; vibration control systems; Damping; Detectors; Distributed control; Instruments; Optical filters; Optical sensors; Process design; Space vehicles; Test facilities; Vibration control;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Southeastcon '90. Proceedings., IEEE
Conference_Location :
New Orleans, LA
Type :
conf
DOI :
10.1109/SECON.1990.117783
Filename :
117783
Link To Document :
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