基于变死区动态补偿的电液比例高精度点位控制

目的 针对以静扭矩为主的负载特性造成阀控马达特性的变死区特点，解决点位控制由于变死区引起的大定位误差问题。方法 选定一个死区补偿初值，以定位精度为目标，根据系统动态响应过程中的误差和误差变化特征信息，由死区补偿自学习算法寻求合适的死区补偿修正量。结果 在大范围内取不同负载扭矩值时，采用了变死区动态补偿算法均能得到高精度的定位控制。结论 采用变死区动态补偿方法，解决了电液比例阀控马达点位控制由于变死

Electrohydraulic Proportional High Accuracy Point to Point Control Based on Variable Deadzone Dynamic Compensation

Aim In accordance with the variable deadzone feature of valve controlled motor caused mainly by the static load torque, the large error problem caused by variable deadzone is to be solved in point to point control. Methods An initial value for deadzone compensation was selected. Taking setting accuracy as target, the appropriate corrected value for deadzone compensation was obtained by self learning algorithms based on the error and the error change in dynamic response. Results Taking different values within a wide range of load torque, the high precision positioning control is achieved by using the variable deadzone dynamic compensation algorithms. Conclusion The large positioning error caused by variable deadzone in electrohydraulic proportional valve controlled motor point to point control is corrected with this method, and it has good adaptability.