研究一类不确定离散切换系统的鲁棒滑模控制问题.针对传统变结构控制应用于离散系统时易失去其鲁棒性的问题,提出一种采用带调整参数递归式滑模函数的离散滑模控制策略,改进了离散时间滑模控制系统的趋近律方法,并针对不确定因素的影响设计了无须知道扰动上界的估计器.应用Lyapunov函数给出了离散切换系统的滑动模态可达条件,并设计了离散切换规则.仿真结果表明了所提出设计方法的有效性. In this paper, the robust sliding mode control for a class of uncertain discrete switched systems is studied. In order to solve the problem that the traditional variable structure control (LMI) tends to lose its robustness when applied to discrete systems, a discrete sliding Modal control strategy is proposed to improve the approach law of the discrete-time sliding mode control system, and an estimator which does not need to know the disturbance upper bound is designed according to the influence of uncertainties. The sliding mode of the discrete switched system is given by Lyapunov function And the discrete switching rules are designed.The simulation results show the effectiveness of the proposed design method.