模糊变机构控制在蛇型弯管机中的应用

Fuzzy Variable Structure Control for Pipe Bender

基于弯管工艺的要求,对控制系统采用速度与位置双重控制策略;针对电液伺服系统非线性、慢时变的特性,在常规的变结构控制中引入模糊控制,有效地削弱滑模切换控制所产生的抖振,而不牺牲滑模控制系统对参数变化和外干扰不确定的强鲁棒性,实现了系统快速、准确的定位要求。该控制策略在实践中取得了良好的控制效果。

Based on the requirement of pipe bending technology, the velocity parameter and the position parameter were controlled in the control system. According to the nonlinear and slow time - varying characters of the hydraulic Servo System, Fuzzy control was used with sliding - mode control. In this way, chatting of the sliding - mode control was limited. At the same time, robust char-acteristics of the system to the parameter variety and disturbance were retained. Fast and accurate control was realized. This control strategy proves to be excellent in practice.