具有多采样率及状态时滞的线性离散时间系统的预见控制

研究了输入多采样率型离散时间控制系统的预见控制器设计问题.首先利用提升技术从形式上消除多采样率特点和状态时滞,把问题转化为一个普通的单采样率无时滞系统的控制器设计问题.由于状态时滞的存在,提升过程中会引入输入量的历史值.把这些历史值和状态时滞项一起放入扩大系统的状态向量中,因此提升过程不会引入误差.针对提升后的系统,利用最优预见控制的标准处理方法,通过构造扩大误差系统,把问题转化为调节问题,最后给出带有预见补偿的最优控制器.再经过变换,得到原系统的预见控制器.同时对预见控制器的存在条件进行了讨论.数值仿真表明,本文所设计的预见控制器是有效的.

Design of an optimal preview controller for linear discrete-time multirate systems with state-delay

Designing a preview controller for discrete-time multirate input systems was considered.At first,by making use of the lifting technique to eliminate the multirate characteristic and the state time-delay of the sampled system,the problem was converted into a controller design problem for a single-rate no-delay sampled system.Because of the existence of state time-delay,the historical values of input data would be introduced during the lifting process.However,the historical values and the state delay were put...