Secondly, the stability of ideal quasi-sliding mode about VSC for time-delay discrete systems is analyzed using matrix inequality method, and the conditions ensuring it asymptotically stable is given.

• 其次,利用矩阵不等式方法给出了时滞离散系统变结构控制的理想准滑模的稳定性分析,给出了其渐近稳定的条件;