一类离散系统基于偏差分离的输出反馈控制  

Output Feedback Control Based on Model Bias Separation for a Class of Discrete-time Systems

作　　者：陈贞丰[1] 章云[1] 杨玲玲[1] 刘治[1] 

机构地区：[1]广东工业大学自动化学院,广东广州510006

出　　处：《数学的实践与认识》2012年第12期194-201,共8页Mathematics in Practice and Theory

基　　金：国家自然科学基金(U0735003;60974047);广东省自然科学基金(8351009001000002;9151009001000011);教育部霍英东青年教师基金(121061);广东省高等学校高层次人才项目

摘　　要：针对一类不确定离散系统,提出一种基于偏差分离的输出反馈双控制策略,首先设计动态输出反馈控制器镇定其标称系统(即不确定性为零的情形);然后通过构造降维观测器,在线获取不确定性信息,并采用线性的补偿器实时补偿系统的不确定性.该控制策略采用线性控制,在工程中可以方便地实现,具有好的工程意义.理论分析证明了闭环指数渐近稳定的充分条件.仿真结果表明该双控制策略的有效性.Double-linear output feedback control strategy based on model bias separation is proposed for a class of uncertain discrete-time systems. The dynamic output feedback controller is firstly designed to stabilize the nominal system （i.e., in the case of uncertainty equals zero）; the compensator is then adopted for real-time compensating the impact of uncertainty, by obtaining the model bias information online by constructing a reduced-order observer. The control strategy is adopted the linear control construction, which is convenient to realize in practical control applications with good engineering significance. The sufficient condition for exponential stability of the closed-loop has been proved. The simulation results show the effectiveness of the proposed control strategy,

关 键 词：偏差分离 离散系统 不确定性 

分 类 号：TP13[自动化与计算机技术—控制理论与控制工程]