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本文从理论上证明了线性离散系统变结构控制（ＶＳＣ）的滑态可达性条件和控制律Ｕ（ｋ）的计算公式，给出了离散ＶＳＣ的设计方法，提出了一种新的ＶＳＣ－ＩＶＳＣ，它由积分控制器和ＶＳＣ复合而成，因此当系统存在参数变化和外部干扰时，仍可获得准确的跟踪性能和良好的鲁棒性。
In this paper, we prove the sliding accessibility and control law U (k) of variable structure control (VSC) in linear discrete systems theoretically, give the design method of discrete VSC, and propose a new VSC- IVSC, which is a combination of integral controller and VSC, so accurate tracking performance and good robustness can be obtained when the system has parameter variation and external interference.