| Summary: | 碩士 === 國立高雄應用科技大學 === 機械與精密工程研究所 === 97 === This paper proposes a robust H∞vibration conrol approach for a class of multi-degree mechanical systems with time-varying perturbations. 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 the generalized plant, a controller is obtained by using H∞ control method. 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 parameter perturbations. Finally, a simulation example of a vehicle suspension system is given to demonstrate the use of the design approach.
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