The utility model relates to a proportional force control method and a system, which relates to the control of output force in an oil circuit and a pneumatic system. The electro-hydraulic proportional valve by-pass arranged in the oil source, the one-way valve is connected with the import and export of oil source, actuator import connected elements are provided on the detection of actuator output, and the detection signal is feedback to the electronic controller, the electronic controller to control the electro-hydraulic proportional valve action, the system in the loading process and by using the method of open loop and closed loop control phases discontinuous function, the invention also uses the ratio of force control method of realizing dynamic check valve with electric proportional valve, pneumatic device for gas. The invention has the advantages of energy saving, good anti-interference performance and high control precision.
【技术实现步骤摘要】
【技术保护点】
一种比例力控制方法,其特征是在力控制过程中:a.电液比例阀在闭环控制时起主要作用,液控单向阀在开环控制时起作用;b.在被控参数变化呈上升趋势至设定值上限前,采用闭环控制;c.当被控参数达到设定值时,由电液比例阀卸荷,压力从高压转入低压,单向阀则维持被控参数基本不变,进行开环控制;d.在被控参数下降至设定值的下限时,系统再次进行闭环控制。
【技术特征摘要】
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