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| Robust Control Based on LMI for Satellite Attitude Control Systems |
| HAN Xiao-Dong-1, BAO Cui-Mei-2, ZHANG Deng-Feng-3 |
| (1.Institute of Telecommunication Satellite, CAST, Beijing 100094, China；2. Department of Automation, Nanjing University of Technology, Nanjing 210009, China；3. Department of Automation, Nanjing University of Science and Technology, Nanjing 210094, China) |
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Abstract Considering the actuator faults, the solution of this problem was obtained for an Hinfinity statefeedback controller with circular disk pole constraints. Based on linear matrix inequality, the consistence on circular disk pole index and Hinfinity index was analyzed, and sufficient conditions for the existence of robust Hinfinity faulttolerant controller were given. The simulation of applying in a satellite attitude control system with actuator faults show the validity of the proposed method. And the results shows that this method has better robustness for satellites attitude control actuator under the condition of performance degradation or fault state，which is capable of meeting the attitude control requirement.
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Received: 11 March 2011
Published: 30 August 2011
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