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2010 Chinese Control and Decision Conference

作者： Changliang Liu,Shaocheng Tong Liaoning University of Technology,Jinzhou,Liaoning 121000,China

In this paper,a fuzzy adaptive decentralized control approach is proposed for a class of large-scale nonlinear systems with unknown high-frequency gain sign,unknown nonlinearities,and the output *** the backstep- ping recursive design,fuzzy logic systems are employed to approximate the unknown nonlinear function,and Nussbaum gain technique is taken to solve the unknown high-frequency gain *** is proved that the proposed fuzzy adap- tive decentralized control scheme can guarantee that all the signals in the closed-loop system are uniformly ultimately bounded(UUB).Simulation results have shown the effectiveness of the proposed method.

关键词： Fuzzy Adaptive Decentralized Control Large-scale Nonlinear Systems high-frequency gain Backstepping K- filter Stability

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A Switching Method for a Model Reference Robust Control with Unknown high frequency gain Sign

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自动化学报 2006年第4期32卷 618-623页

作者： YUAN Li-Na LIN Yan Mechanics and Electricity Department Wuyi University Guangdong 529020 School of Automation Beijing University of Aeronautics and Astronautics Beijing 100083

The problem of controlling a single-input-single-output plant without prior knowledge of high frequency gain sign is addressed by using the model reference robust control approach.A switching method is proposed based on a monitoring function so that after a finite number of swi- tchings the tracking error converges to zero ***,it is shown that if some initial states of the closed-loop system are zero,only one switching is needed.

关键词： Model following high-frequency gain robust control switching control

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An Adaptive Quasi-Sliding Mode Control without Chattering

An Adaptive Quasi-Sliding Mode Control without Chattering

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第37届中国控制会议

作者： Wenchao Lei Chanying Li Key Laboratory of Systems and Control Academy of Mathematics and Systems ScienceCAS School of Mathematical Sciences University of Chinese Academy of Sciences

The main problem hindering the engineering application of the conventional sliding mode control（CSMC） is the well-known chattering *** work investigates how to design a chattering-free adaptive sliding mode controller for a class of nth-order nonlinear uncertain *** remove the undesired chattering of the CSMC method,a novel continuous sigmoid function has been introduced to generate the quasi-sliding mode process instead of using the discontinuous sign *** the same time,an effective adaptive control gain is designed by using the same sigmoid *** with the existing works on the adaptive sliding mode control design,the adaptive mechanism proposed in this paper can effectively relax the restrictions on the prior information of the system *** particular,the designed parameters and the adaptive control gain can characterize the admissible boundary of the high-frequency gain uncertainty of the control input in real *** refer this approach as an adaptive quasi-sliding mode control（AQSMC）.The stability analysis of the AQSMC method has also been provided with the help of Lyapunov ***,some numerical simulation results are presented to demonstrate its effectiveness and superiority.

关键词： Adaptive control Sliding mode control Chattering problem Sigmoid function high-frequency gain

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