| Summary: | 碩士 === 國立高雄應用科技大學 === 機械與精密工程研究所 === 103 === This paper proposes a robust H∞ control approach for a class of H∞ Control of Satellite Attitude Control System with Time-Varying Uncertainties. In the approach, weighting functions for loop shaping are first chosen to combine with the original system such that a generalized plant is formed. Then, for generalized plant, a controller is obtained by using H∞ control method. The Hybrid Taguchi-Genetic Algorithm(HTGA) is employed to find the optimal gains of the weighting functions which will lead to a stabilizing H∞ controller. Then, a sufficient condition in terms of linear matrix inequalities(LMIs) is employed to guarantee that the resulting control system is asymptotically stable in the presence of time-varying uncertainties. Finally, assimilation example of a Satellite Attitude Control System is given to demonstrate the use of the design approach. The results show that the designed H∞ controller can efficiently achieve the desired control for atellite Attitude System and ensure its stability in the presence of time-varying uncertainties.
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