一种基于死区离散趋近律的准滑模控制  

Quasi-sliding-mode Control Based on Discrete Reaching Law with Dead Zone

作　　者：刘涛[1,2] 刘贺平[1] 

机构地区：[1]北京科技大学自动化学院,北京100083 [2]北京物资学院信息学院,北京101149

出　　处：《自动化学报》2011年第6期760-766,共7页Acta Automatica Sinica

摘　　要：针对受正弦信号干扰的不确定离散时间系统,提出一种基于死区离散趋近律的准滑模控制方法.系统能够由任一初始状态向死区作单调趋近运动,并于有限时间到达准滑动模态区作准滑动模态运动.准滑动模态带具有任意阶次小的特点.该方法进步增强了系统鲁棒性,有效改善系统动态品质,减小了稳态误差.系统无控制抖振和稳态抖振产生.仿真结果表明该方法的有效性.A quasi-sliding-mode control design method based on discrete reaching law with dead zone is considered for discrete time systems with uncertainty which is a sinusoidal signal. The control strategy could drive the state of controlled system to the dead zone monotonously for arbitrary initial value and the quasi-sliding-mode is reached in a finite time. Quasi-sliding- mode band could be designed to be as small as arbitrary order of magnitude. At the same time, better robustness is guaranteed, dynamic quality is improved and steady-state error is reduced. Furthermore, the undesired control chattering and steady-states chattering are avoided. Simulation results show the effectiveness for the proposed method.

关 键 词：离散趋近律 死区 准滑模控制 不确定性 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]