13 June 1997 Antiphase control system for active microvibration damping onboard satellites
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Disturbances attenuation, typically up to 200 Hz, onboard satellites is a key issue for advanced optical space systems with stringent spatial and temporal resolution requirements. Under ESA contract, Matra Marconi Space has conducted an ambitious proof-of-concept programme aiming at designing and demonstrating through prototypes and test innovative active vibration damping systems. In particular, a centralized anti-phase control (APC) system operating on distributed sensors and actuators to compensate stationary harmonic disturbances has been breadboarded and tested. The APC algorithm involves three major functions: (i) extraction of the harmonics signal by synchronous demodulation, (ii) identification of the complex gains between sensors and actuators using a recursive least squares algorithm, and (iii) anti-phase computation. The control algorithm has been implemented on a real-time test bench based on a fast DSP computer. The experiment has been performed on an engineering model of a representative space platform, namely MARCOTS. The measured performances, i.e. harmonic rejection at the controlled frequencies, range from 20 to 40 dB and are consistent with predictions from numerical simulations. Finally, a major advantage of the APC algorithm is intrinsic robustness to actuator failures, without performance impact for a single failure and 10 dB degradation for a double failure.
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Ludovic H. Vaillon, Ludovic H. Vaillon, Christian Philippe, Christian Philippe, } "Antiphase control system for active microvibration damping onboard satellites", Proc. SPIE 3039, Smart Structures and Materials 1997: Mathematics and Control in Smart Structures, (13 June 1997); doi: 10.1117/12.276561; https://doi.org/10.1117/12.276561

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