中文摘要：

针对比例电磁铁成本高、磁路结构复杂、加工工艺要求高的特点,提出用开关电磁铁代替比例电磁铁控制电液比例阀的方法,使开关电磁铁具有准恒力特性。由于开关电磁铁具有很强的非线性特性,难以用解析方法得到出力和位移的关系式,因此采用双线性插值算法计算出开关电磁铁在任意位置的输出力,根据软磁材料的磁滞理论,采用2次调整线圈电压的方法在有效行程内拉平力位移特性,同时减小了滞环效应。试验测试结果表明,采用新的方法使开关电磁铁达到了与比例电磁铁相近的控制效果。

英文摘要：

Due to the limitation of the proportional solenoid which is costly,with complex magnetic circuit and high processing technique,the switching solenoid may replace the proportional solenoid to control the electro-hydraulic proportional valve,and possesses quasi-constant force characteristics as well.As the strong non-linear characteristics of switching solenoid,it＇s difficult to obtain mathematics analytic expression between the electromagnetic force and stroke.Bilinear interpolation algorithm was introduced to calculate the switching solenoid output force at any position.Based on the magnetic hysteresis theory of soft magnetic material,the nonlinear characteristic was improved with two-way adjustment of core voltage.Force features in the effective stroke became flat,and the hysteresis effect was decreased.Experimental results show that the introduction of new ways to make the switching solenoid with the proportional solenoid electromagnet to achieve similar control effect.