为了回避时延现象的存在给变结构控制方案中滑动模态的恰当定义及保证其渐近稳定的切换函数参数矩阵的确定带来的诸多不便和困难,对于线性时滞系统,首先根据帕德近似公式对其模型作近似处理,然后再采用变结构控制。该控制方案具有一定的应用价值。 In order to avoid the phenomenon of delay, this paper presents a lot of inconveniences and difficulties to determine the sliding mode in the variable structure control scheme and to determine the asymptotic stability of the switching function parameter matrix. For the linear time-delay system, Approximate formula for its model for approximate treatment, and then use variable structure control. The control scheme has a certain application value.