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Proceedings Paper

Adaptive control for payload launch vibration isolation
Author(s): Julian R. Jarosh; Gregory S. Agnes; Gregory G. Karahalis
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Paper Abstract

The Department of Defense has identified launch vibration isolation as a major research interest. Reducing the loads a satellite experiences during launch will greatly enhance the reliability and lifetime and decrease the payload structural mass. DoD space programs stand to benefit significantly from advances in vibration isolation technology. This study explores potential hybrid vibration isolation using adaptive control with a passive isolator. Lyapunov analysis is used to develop the structural adaptive control scheme. Simulink and Matlab simulations investigate these control methodologies on a lumped mass dynamic model of a satellite and its representative launch vehicle. The results are compared to Proportional-Integral-Derivative (PID) control and skyhook damper active control methods. The results of the modeling indicate adaptive control achieves up to a 90 percent reduction in loads on the payload when compared to the conventional active control methods. The adaptive controller compensated for the loads being transmitted to the payload from the rest of the launch vehicle. The current adaptive controller was not able to effectively control the motion of a vibrating subcomponent within the payload or the subcomponent's effect on the overall payload itself.

Paper Details

Date Published: 2 July 2001
PDF: 13 pages
Proc. SPIE 4331, Smart Structures and Materials 2001: Damping and Isolation, (2 July 2001); doi: 10.1117/12.432700
Show Author Affiliations
Julian R. Jarosh, Air Force Institute of Technology (United States)
Gregory S. Agnes, Air Force Institute of Technology (United States)
Gregory G. Karahalis, Air Force Institute of Technology (United States)

Published in SPIE Proceedings Vol. 4331:
Smart Structures and Materials 2001: Damping and Isolation
Daniel J. Inman, Editor(s)

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