摘要
离散时间不确定系统滑模控制,其常规方法是利用不确定性的界设计控制律,往往造成结论的保守和抖振的加剧.为了克服这一缺点,采用预估+步长修正的方法设计离散不确定系统变结构控制律.仿真表明该方法对离散不确定性有良好的控制效果和鲁棒性,且保守性小.
The conventional variable structure control for discrete uncertain system,requires the bound of the uncertainty known,and the control law based on the upper boundary of the uncertainty must be over conservative and enlarges chattering.In order to overcome the shortcoming above,a novel variable structure control law with perturbation estimation and online step correction is proposed . The results of simulation indicate that the proposed control law has good stability and smaller conservation than the methods of convention.
出处
《科技通报》
北大核心
2004年第5期420-423,427,共5页
Bulletin of Science and Technology
关键词
变结构控制
离散时间系统
不确定性
鲁棒性
variable structure control
discrete-time system
uncertainties
robustness
