不确定性随机系统的输出反馈变结构滑模控制  

Output-Feedback Variable-Structure Sliding-Mode Control of Stochastic System with Uncertainties

作　　者：彭云建[1] 邓飞其[1] 

机构地区：[1]华南理工大学自动化科学与工程学院,广东广州510460

出　　处：《华南理工大学学报（自然科学版）》2007年第9期50-54,共5页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(60374023)

摘　　要：研究了带有时变不确定性的It型随机系统的输出反馈镇定问题,采用变结构滑模控制(SMC)方法设计了镇定控制器.在系统的不确定性满足一定匹配条件的情况下,构造了对不确定性具有不变性以及参数不含噪声激励的滑模切换流形和变结构滑模控制律,分析和证明了滑模的可达性和闭环系统的稳定性,并给出了滑模控制律的参数选择条件.最后通过示例系统仿真实验证明了文中结果的正确性和有效性.　The paper aims at the problem of output-feedback-based stabilizing control of an Ito＇s stochastic system with time-varying uncertainties,and at the design of a robust stabilization controller mainly adopting variable-structure sliding-mode control（SMC） techniques.By presupposing the system uncertainties satisfying certain matching conditions,a sliding-mode switching manifold and a SMC law are proposed,which are invariable to the structural uncertainties and possess the parameters without stochastic noise.Then,the accessibility of the sliding mode and the stability of the closed-loop system are analyzed,and some necessary conditions are further obtained to select the parameters for the SMC law.By the simulation of an illustrative example system, the correctness and effectiveness of the proposed controlling scheme are finally verified.

关 键 词：Ito型随机系统 输出反馈 变结构滑模控制 滑模切换流形 

分 类 号：TP13[自动化与计算机技术—控制理论与控制工程] TP202.4[自动化与计算机技术—控制科学与工程]