Satellite vibration control using frequency selective feedback

Tan, A.C.H., Meauers, T., Veres, S.M., Aglietti, G S and Rogers, E (2003) Satellite vibration control using frequency selective feedback. Proceedings of the 43rd IEEE Conference on Decision and Control, Maui County, United States. 09 - 12 Dec 2003. pp. 1693-1698 . (doi:10.1109/CDC.2003.1272856).

Abstract

This paper addresses the problem of actively attenuating the vibration of plates on satellites. A pure feedback controller is demonstrated which operates at a set of dominant frequencies in a disturbance spectrum, where the control path model is estimated on-line. A new feature of the frequency selective feedback is the use of the inverse Hessian to improve adaptation speed. The control scheme also incorporates a frequency estimation technique to determine the relevant disturbance frequencies with higher precision than the standard fast Fourier transform (FFT). The controller is implemented on a test rig to demonstrate the practical feasibility of the method. A disturbance with three rational dominant frequencies is introduced. If FFT were used instead of the frequency estimation method proposed, then a large number of samples would be required to accurately estimate the disturbance frequencies, and, most importantly, FFT-estimated frequencies could lead to an unstable control system due to their granularity. Using the proposed frequency estimation method, the total achieved attenuation is 26 dB on the experimental rig.

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Contributors

Author: E Rogers

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