Journal
CONTROL ENGINEERING PRACTICE
Volume 16, Issue 10, Pages 1250-1258Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.conengprac.2008.02.001
Keywords
satellite attitude control; reaction wheels; redundant wheels; fault tolerant control; time-delay control
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The authors propose a simple and effective fault tolerant control method for satellites with four reaction wheels. The proposed method is based on dynamic inversion and time-delay control theory. Faults of reaction wheels are modeled as additive and multiplicative unknown dynamics, which are estimated by using one-step previous state information and canceled out by the estimated values. Therefore, this method can accommodate faults rapidly without any explicit reconfiguration. Numerical simulations demonstrate the performance of the proposed method by comparing with a conventional proportional-derivative control. (C) 2008 Elsevier Ltd. All rights reserved.
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