2D电液数字换向阀

给出了一种新型电液数字换向阀.该阀在结构上利用阀芯的双运动自由度,并通过加工于阀芯上的高低压孔与加工于阀芯孔上的螺旋槽相配合构成伺服螺旋机构实现双级导控的功能;在控制上采用一种特殊的实时跟踪算法通过控制步进电动机的每相通电时间的长短实现其输出角位移的连续控制,以解决传统的步进式数字控制元件的量化误差与响应速度之间所固有的矛盾.试验结果表明该阀的主要动静特性指标已超过现有国内外相同规格不同类驱动与控制方式的比例阀的性能.

2D DIGITAL DIRECTIONAL CONTROL VALVE

A new type of digital directional valve is presented.The configuration is developed by the utilization of the two-motions-freedom of a single spool. To solve the contradiction between the response speed and the quantitative accuracy which characterizes the previous valve of the same sort, a specially designed tracking program is adopted to the stepper motor control to smooth displacement output. Experimental results show that both static and dynamic performances of the digital valve are superior to these of proportional valves of various types.