直流伺服系统离散旋转滑模变结构控制

The Modified Variable Structure Control of a DC Servo System

针对直流伺服系统设计了一种改进型变结构控制器：一是采用最优积分型变结构控制规律来减小抖动；二是来用旋转滑模方式来缩短滑模到达段的时间以提高系统的鲁棒性。仿真结果表明，改进后的变结构控制较之传统的变结构控制能使系统获得优良的动、静态性能。

A modified variable structure controller(MVSC) for a DC servo system is presented, an integraloptimal variable structure control law is proposed to reduce the chattering, a rotating sliding mode is used toimprove the robustness. The MVSC can solve the conflict of fast speed、 no overshoot as well as improvedPerformances compared with conventional VSC, which demonstrates the potential of the proposed scheme.