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Analysis and Design of switching surface for Nonlinear Variable Structure Control Systems

Tsinghua Science and Technology 1997年第3期2卷 117-120页

作者：韩云瑞

One of the main problems in variable structure control systems is finding the switching surface on which the controlled plant has a desired specific behaviour.This paper presents a new method for finding switching surfaces of nonlinear variable structure systems. Using this method, the designer first presents a system with the desired properties, then finds the switching function σ(x) such that the switching surface S∶={x∈R n|σ(x)=0} is coincident with the sliding motion in the given system. This method is applied to the design of the variable structure controller in a power system and the highest transient stability limitations are attained. 

关键词： variable structure control switching surface equivalent control projector excitation controller

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THE GENERAL DESIGN METHOD OF switching surface FOR VARIABLE STRUCTURE CONTROL

THE GENERAL DESIGN METHOD OF SWITCHING SURFACE FOR VARIABLE ...

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第二十届中国控制会议

作者： James C．Hung Dept．of Electrical Engineering The University of TennesseeU．S．A 37996

Based on the equivalence of sliding mode equation of variable structure control and the expected system equation, a general design method of switching surface is introduced. Various kinds of switching surface can be o... 详细信息

关键词： Variable Structure Control Sliding Mode switching surface

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An LMI-based variable structure control for a classof uncertain singular Markov switched systems

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控制理论与应用（英文版） 2007年第4期5卷 415-419页

作者： Lijun GAO Yuqiang WU Institute of Automation Qufu Normal University Rizhao Shandong 276826 China

An H-infinifty variable structure control is presented for singular Markov switched systems with mismatched norm-bounded uncertainties and mismatched norm-bounded external disturbances. It is shown that the sliding mode dynamics on the given switching surface is regular, impulse-free, and stochastically stable and satisfies H-infinity performance. A variable structure controller is designed to guarantee that the system trajectory converges to the linear switching surface in some finite time. Finally, a numerical example is solved to show the effectiveness and validness of the theoretical results.

关键词： Markov switched systems Variable structure LMI switching surface

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Nonlinear　VSC　Technique　for　Power　Sys－tem　Integrate　Controlers

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Tsinghua Science and Technology 1996年第3期1卷 88-92页

作者：韩云瑞

This paper studies the nonlinear variable structure control (VSC) technique for designing power system integrate control systems which include an excitation controller and fast valve controller.A new method is applied to find nonlinear switching surface in deriving the control strategy.The responses to various large perturbation are simulated.The simuulation results show that the nonlinear VSC technique for integrated control systems can considerably improve the transient stabilization limitation of power systems and improve the dynamic properties of the generators.

关键词： variable structure control system equivalent control switching surface power system excitation fast valve transient stabilization limitation

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Uni-axial and multi-axial Electromechanical Couple behavior of PZT53

Uni-axial and multi-axial Electromechanical Couple behavior ...

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2012年海峡两岸破坏科学/材料试验学术会议

作者： Q.Wan C.Chen Y.P.Shen Institute of Structural Mechanics China Academy of Engineering Physics Key Laboratory School of Astronautics and AeronauticsXi'an Jiaotong University

The uni-axial and multi-axial electric-mechanical behavior are measured in the investigation.The results under two uni-axial loading mode show that when the loading parallel to the polarization and electric field,the compression has obvious effect on the remanent polarization, coercive field and strain magnitude,however when the loading perpendicular to the polarization and electric field,the loading has little effect on the remanent polarization,coercive field,the tension has obvious effected the strain magnitude.The multi-axial constitutive behavior of poled and unpoled PZT5 is measured under different proportional tension-torsion loading and compression-torsion loading until destroy.Deformation is measured using strain gauges.These results are used to map out "switching" and "destroy" surfaces.The two surfaces are found to be a function of the polarization.switching surface is similar to Drucker-Prager yield surface.Destroy behavior corresponds to maximal principal normal stress rule.For poled PZT53,the effect of bias electric field on its multiaxial behavior has also been exploited.The results indicated that the "switching" surface disappear with the increased bias electric.The ultimate goal is to develop an experimentally validated micromechanics based phenomenological constitutive model for ferroelectric materials.

关键词： Uni-axial Multi-axial Electromechanical Couple Constitutive switching surface Destroy surface

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