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第27届中国控制与决策会议

作者： LI Ming-jun ZHANG Lei Department of Urban Rail Transportation Beijing Vocational College of Transportation

ISBN: (纸本)9781479970179

A new predictive variable structure control(PVSC) using the phase plane is proposed and applied to the third-order nonlinear model of the uncertain single machine infinite bus system(SMIBS).Due to the discontinuity of the control switches,chattering in the traditional variable structure control is avoided in *** global coordinate transformations are used to change SMIBS into a second-order *** limits of the system's uncertainties are used for *** control switches according to the predictive abscissa value of one point in the phase trajectory,which guarantees the trajectory enters a special area in the phase plane within limited time,remains in it and converges to the equilibrium point at an exponential *** results show that the system can quickly converge to the original equilibrium point and that the control law is robust.

关键词： predictive variable structure control Single Machine Infinite Bus System Phase Plane Robust control

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predictive variable structure control FOR A CLASS OF NONLINEAR SYSTEM

引用

Chinese Journal of Aeronautics 1999年第4期12卷 231-235页

作者：刘春梅沈毅胡恒章王焕刚 Department of Control Engineering Harbin Institute of Technology Harbin 150001 China

Nonlinear sliding m ode predictive controller is designed for a class of nonlinear system w ith unm odeled dynam ic characteristics and nonlinear term . The m ethod is based on nonlinear opti- m alpredictive control. The variable structure controllaw m inim izes the quadratic index ofa predic- tive sliding m ode, w hich contains thecostfunction ofcontrolpreventing the controleffectfrom satu- ration for in m ostpracticalim plem entation the controlinputs are bounded by physicalconstraints and energy constraints. According to the im m easurable states, the variable structure observer for nonlin- ear system sisadapted. The variablestructure system m ethod isaptto therealization ofobserverw ith variable param eters and uncertainty. The proofshow s thatthe states ofthe observer asym ptotically convergence to the realstates ofthe system although itisofuncertainty and nonlinear term s. Final- ly, the digitalsim ulation results prove the effectiveness ofthe proposed m ethod.

关键词： predictive variable structure control variable structure observer nonlinear system

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