Controller design for fractional-order interconnected systems with unmodeled dynamics |
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Authors: | Hua Changchun Ning Jinghua Guan Xinping |
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Institution: | 1.Department of Automation, Yanshan University, Qinhuangdao, 066004, China ;2.Department of Automation, Shanghai Jiaotong University, Shanghai, 200240, China ; |
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Abstract: | This paper focuses on the output feedback tracking control for fractional-order interconnected systems with unmodeled dynamics. The reduced order high gain K-filters are designed to construct the estimation of the unavailable system state. Unmodeled dynamics is extended to the general fractional-order dynamical systems for the first time which is characterized by introducing a dynamical signal r(t). An adaptive output feedback controller is established using the fractional-order Lyapunov methods and proposed by novel dynamic surface control strategy. Then, it is confirmed that the considered system is semi-globally bounded stable and the errors between outputs and the desired trajectories can concentrate to a small neighborhood of the origin. Finally, a simulation example is introduced to demonstrate the correctness of the supplied controller. |
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