作者：徐磊, 陶建峰, 刘成良

作者单位：上海交通大学机械与动力工程学院, 上海 200240

关键词：电液比例变量泵; 控制方法; 仿真; 测试

摘要：

为了对电液比例变量泵的控制方法进行仿真研究,建立了基于Simhydraulics的电液比例变量泵的控制模型;为了测试控制方法的工作性能,通过调节节流阀开口对泵进行加载;经过理论分析及仿真研究,明确了各种控制方法的问题所在;为了解决压力控制模式下压力振动较大及PD控制器难以消除控制误差等问题,提出了对双闭环控制方法引进积分补偿的控制方法;针对压力控制模式和流量控制模式下不同的控制要求,建立了可根据泵的工作模式自动调整参数的PID控制器。对新提出的控制方法进行数值仿真及试验显示,新控制方法不但具有双闭环控制方法的稳定性能,对电液比例变量泵因流量变化带来的误差也具有很好的消除作用。

Study on control schemes for electro-hydraulic proportional pump

XU Lei, TAO Jian-feng, LIU Cheng-liang

School of Mechanical Engineering, Shanghai Jiaotong Universiy, Shanghai 200240, China

Abstract: To study the effects of different control schemes on electro-hydraulic proportional pump, a pump model based on the Simhydraulics was constructed. After theoretical analysis and simulation, the disadvantages of different control schemes were clarified. As the pressure vibration under pressure control mode is obvious and the tracking error can't be eliminated by a PD controller, a double closed-loop control scheme with an integral compensator was proposed. According to the requirements in pressure-and flow-control modes, a controller, which can adjust the parameters and select input signals automatically with the switching of control mode, was built. Both simulation and experiment results show that the proposed scheme can not only work stably as double closed-loop control scheme, but also efficiently eliminate the errors led by the change of flow rate.

Keywords: electro-hydraulic proportional pump; control scheme; simulation; test

2010, 36(4): 1-4  收稿日期: 2009-9-21;收到修改稿日期: 2009-12-9

基金项目: 国家自然科学基金项目(50805090)

作者简介: 徐磊(1986-),男,江苏连云港市人,硕士,专业方向为机电控制与动力工程。

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