研究了有界不确定离散时间系统的输出反馈滑模控制设计问题。提出一种基于多速率采样输出反馈和幂次函数趋近律的离散滑模控制方法,并将研究结果用于设计无刷直流电机位置伺服系统。该方法仅需已知位置信号即可完成位置伺服系统的设计。理论分析及仿真结果表明,所设计的控制器可以消除系统抖振,并使伺服系统具有良好的跟踪能力和强鲁棒性。
The design of sliding mode output feedback control for uncertain discrete time systems is discussed. A new approach for discrete sliding mode control (DSMC) based on the power-function reaching law approach together with the multirate output feedback technique is presented. This method is applied to a brushless DC motor position servo system. The method uses only position signal to accomplish position servo system. Theoretical analysis and simulation results show that the controller designed can eliminate the chattering and provide the servo system with perfect tracking ability and strong robustness.