一种基于改进趋近律的离散变结构控制方法  

Discrete-time variable structure control based on improved approach law

作　　者：朱齐丹[1] 吕开东 李新飞 刘志林[1] 张智[1] 

机构地区：[1]哈尔滨工程大学自动化学院,黑龙江哈尔滨150001

出　　处：《系统工程与电子技术》2012年第6期1211-1214,共4页Systems Engineering and Electronics

基　　金：国家自然科学基金(50909026;61104037);黑龙江省自然科学基金(F200916)资助课题

摘　　要：研究了使用离散指数趋近律方法设计的离散时间控制系统中存在的抖振现象。为了减小这种抖振现象,提出了一种改进的离散趋近律设计方法,而且给出了趋近律的参数选择原则。仿真结果表明:在使用该改进趋近律方法设计的离散时间变结构控制器的调节下,系统的运动状态最终趋近于原点,还可使系统状态保持步步穿越切换面,提高了控制系统的鲁棒性。The chattering of discrete-time variable structure controller designed by discrete exponent reac- hing law is studied. In order to reduce this chattering phenomenon, an improved method about reaching law is presented. Simulation result shows that the discrete-time variable structure controller adopting the improved reaching law, not only makes the control system status approach zero gradually, but also makes it cross the switching surface at every step, and the robust performance of the controller is also improved.

关 键 词：离散变结构控制 趋近律 抖振 鲁棒性 

分 类 号：V273[航空宇航科学与技术—飞行器设计]