时变负载比例阀控马达的精确点位控制

目的针对负载特性是以静扭矩为主的阀控马达电液比例伺服系统的点位控制,研究在变死区、变增益非线性因素影响下的定位控制性能问题.方法研究了死区的动态补偿方法,解决了由于变死区引起的大定位误差问题;提出了三级智能控制策略,解决了系统由于变增益引起的大超调问题.结果实验结果表明,在负载扭矩大范围内变化下,取得了快响应、高精度、小超调甚至无超调的定位控制.结论三级智能控制结合死区动态补偿的综合控制方法解决了阀控马达电液比例伺服系统由于变死区、变增益引起的定位控制性能问题.

Precision Point to Point Control of Proportional Valve Controlled Motor with a Time Varying Load

Aim In accordance with the positioning control for valve controlled motor electrohydraulic proportional servo systems driving the static load torque, the positioning performance was studied in the presence of the time? varying deadzone and gain. Methods The large positioning errors caused by the time varying deadzone were significantly reduced by using the dynamic compensation method for the deadzone; and the large overshoot caused by the time varying gain were dramatically reduced by using the three section intelligent control schemes. Results Experimental results demonstrated that the positioning performance of rapid response, high accuracy and smaller or even no overshoot was achieved under a wide variations of load torque. Conclusion The good positioning performance for valve controlled motor servo systems has been achieved in the presence of the time varying deadzone and gain.