一种时变准滑模变结构控制器设计

Design of Time-Varying Variable Structure Controller

提出一种新的具有饱和特性的控制算法,利用该算法,按照参考模型的误差状态,在相空间中平移滑模切换面,可以使滑模变结构控制的扰动不变性在系统运行状态的全局范围内成立;为了抑制抖振,同时采用一种PD型的控制结构限制系统的滑模态趋近速度。仿真结果表明,该设计方法十分简单、有效。

A kind of control structure with saturation ispresented at first. Shifting the sliding surface in phasespace according to the error states of a referenced model,the robustness for perturb is hold on the whole runningstate. To reduce the chattering, a PD-like control structureis employed which can slow the speed when the systemruns to the sliding surface. Example shows this method issimple and effective.