【作者】 王勇； 张新政； 叶巧文；

【Author】 WANG Yong, ZHANG Xinzheng, YE Qiaowen Faculty of Automation, Guangdong University of Technology, Guangzhou, 510090, China

【机构】 广东工业大学自动化学院；

【摘要】 变结构控制系统中一般都会出现抖振.抖振己成为变结构控制理论得到广泛应用的主要障碍之一.本文作者着眼于改善变结构控制系统品质的目的,提出I-变速趋近律和m-变速趋近律,及利用该趋近律方法,设计了基于离散时间线性定常系统的变结构控制(VSC).系统在该变结构控制的作用下,趋近运动和滑动运动的速度是可变的:保证了趋近模态和滑动模态的品质, 并能有效地削弱了抖振,从而改善了闭环系统的品质.通过实例仿真,验证了该设计方法是有效和可行的.更多还原

【Abstract】 Chatter usually exists in the variable structure control system. Chatter has been the main obstacle for variable structure control system to be applied. In this paper, aiming at improving the performance of the variable structure control system, the authors bring forward a novel approach law called I -variable speed reaching law and m-variable speed reaching law, and give the designing method of VSC of which is obtained straightforward by the reaching law method, based on the discrete time linear constant system. It has shown, under the action of the VSC on the system, that the reaching mode and sliding mode have changeable speeds, the good performance of reaching mode is kept and the chatter of quasi-sliding mode is weakened very well. Therefore, the performance of the closed loop system is improved very well. The simulation results have revealed that the design methods are effective and feasible.更多还原