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2010 Chinese control and Decision Conference

作者： xisheng zhan department of control science and engineering,hubei normal university,huangshi hubei province 435002

＜正＞A design method of robust iterative learning controller（RILC） is proposed for nonlinear system with repetitive actions in this ***,the Takagi and Sugeno（T-S） fuzzy model is employed to approximate a nonlinear system with repetitive actions,and thus global fuzzy system model is displayed as the form of uncertain *** the robust iterative learning controller is designed by the T-S fuzzy model employed as a dynamic model of nonlinear *** proposed controller is obtained by solving linear matrix inequalities（LMI）,and both sufficient and essential of the convergence conditions are deducted by Lyapunov *** proposed controller needs not satisfy the condition of fully observable as well as we did before.A single inverted pendulum problem has been simulated with RILC and compared with iterative learning controller（ILC） and the results show that RILC performs better than ILC.

关键词： T-S model nonlinear iterative learning control linear matrix inequality

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Iterative Learning control Design on Nonlinear Time-delay Systems

Iterative Learning Control Design on Nonlinear Time-delay Sy...

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第二十九届中国控制会议

作者： zhan xisheng department of control science and engineering,hubei normal university,huangshi hubei province 435002,P.R.China

A robust iterative learning control algorithm is proposed based on T-S model for a kind of nonlinear time-delay systems with repetitive ***,the proposed algorithm uses fuzzy T-S model to build the model for nonlinear time-delay system,secondly,the global fuzzysystem model could be described as the form of uncertain systems,finally,the robust iterative learning controller is designed through resolving Riccati *** sufficient and essential condition of the algorithm is deduced based on Lyapunov theories for nonlinear time-delay system.

关键词： Nonlinear Time-Delay System T-S Model Iterative Learning control Robust control

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Performance Limitations in Tracking of Linear System with Measurement Noise

Performance Limitations in Tracking of Linear System with Me...

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第二十九届中国控制会议

作者： zhan xisheng1,2,GUAN Zhihong1,XIAO Jianwen1,WANG Yanwu1 1.department of control science and engineering,Huazhong university of science and Technology,Wuhan 430074,P.R.China2.department of control science and engineering,hubei normal university,huangshi 435002,P.R.China

An optimal performance issues about linear time-invariant（LTI）systems tracking stochastic signal with measurement noise is proposed in this *** integral square error criterion is used as a measure for the system tracking error between the output of a given plant and reference signals,the spectral factorization is applied to obtain optimal solution of the system *** is shown that nonminimum phase zeros and unstable poles have a negative effect on a feedback system’s ability to reduce the system error with measurement noise;simultaneously,the performance limitation becomes worse for an unstable,nonminimum phase plant because of measurement ***,the measurement noise don’t affect performance limitation for an stable nonminimum phase plant.

关键词： Optimal Tracking Performance Limitation Two-Parameter control Measurement Noise

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Stability and Hopf Bifurcation Analysis on a Numerical Discretization of the Distributed Delay Equation

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Chinese Physics Letters 2012年第5期29卷 7-10页

作者： WU Jie zhan Xi-Sheng zhanG Xian-He GAO Hong-Liang College of Mechatronics and control engineering Hubei Normal UniversityHuangshi 435002

A kind of discrete logistic model with distributed delays obtained by the Euler method is investigated,where the discrete delay Τ is regarded as a *** analyzing the associated characteristic equation,it is found that the stability of the positive equilibrium and Hopf occurs when Τ crosses some critical *** the explicit formulae which determine the stability,direction and other properties of the bifurcating periodic solution are derived by using the theory of normal form and center ***,numerical simulations are performed to verify and illustrate the analytical results.

关键词： parameter. value. Hopf

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