有限时间稳定就是指在一个有限的时间区间内,系统的状态轨线始终保持在预先给定的界限内,它是与通常意义下稳定相互独立的一个概念。本文给出了离散奇系统有限时间稳定以及有限时间有界的定义,研究了离散奇异系统通过状态反馈的有限8-间控制问题。本文当中首先给出了离散奇异系统是有限时间稳定或有限时间有界的充分条件,这些条件可归结为基于线性矩阵不等式的可解性问题。在此基础上又得到了两个充分条件,它们能保证控制器的存在,并且使得闭环系统是有限时间稳定或者是有限时间有界的。然后通过线性矩阵不等式的求解,给出了控制器的设计方法。最后用两个数值算例验证了该方法的有效性。
Finitc-time stability means that the state paths of the systems keep in the given boundaries in a finite-time interval. It' s dif- ferent from the common stability. The problem of finite-time control of discrete-time singular systems is studied in this paper. First the definitions of finite-time stability and finite-time boundary of discrete-time singular systems are given. Then two sufficient conditions are devised, which can guarantee the existence of controllers and stabilize the closed-loop systems. By solving linear matrix inequalities, the design of controllers is stated. Then, two numerical examples are given to demonstrate the effectiveness of the proposed approach.