【作者】 杜春燕； 邢关生； 吴爱国；

【Author】 DU Chunyan~1,XING Guansheng~2,WU Aiguo~1 1.School of Electrical Engineering and Automation,Tianjin University,Tianjin 300072,P.R.China 2.School of Control Science and Engineering,Hebei University of Technology,Tianjin 300030,P.R.China

【机构】 天津大学电气与自动化工程学院； 河北工业大学控制科学与工程学院；

【摘要】 本文基于迭代逼近法为锻造液压机设计滑模控制器。使用一系列时变线性系统迭代逼近锻造液压机的非线性模型,将非线性系统的控制问题转化为时变线性系统的控制问题。针对这一系列时变线性系统设计滑模控制律,所得的一系列控制律最终收敛于原非线性系统的一个有效滑模控制律。仿真效果表明,应用该控制律,锻造液压机可以实现精确速度跟踪;在液压油体积弹性模量及锻件反抗力发生变化时系统具有鲁棒性。更多还原

【Abstract】 In this paper,a sliding mode controller is designed for a hydraulic press based on iterative approximation method. The nonlinear model of the hydraulic press is approached by a sequence of iterative linear time-varying systems,thus the control problem of the nonlinear system could be solved through these linear systems.Then a series of sliding controllers are designed for the sequence of linear time-varying approximations,these controllers will converge to a effective sliding mode controller of the original nonlinear system.Simulation results show that precise speed tracking could be achieved through this method.And when the bulk modulus and the reaction force change,the controller is robust.更多还原