| Summary: | 碩士 === 國立高雄應用科技大學 === 機械與精密工程研究所 === 101 === This paper proposes a robust control approach for a class of ship diesel engine speed regulation 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 the generalized plant, a controller is obtained by using 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 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, a simulation example of a speed control system of ship switchboard diesel engine is given to demonstrate the use of the design approach. The results show that the designed controller can efficiently achieve the desired speed for ship diesel engine speed regulation system and ensure its stability in the presence of time-varying uncertainties.
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