一类离散系统基于偏差分离的输出反馈控制

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.

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

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.