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给出了一种新型电液数字换向阀。该问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。
A new type of electro-hydraulic digital valve is given. The structure of the use of double-freedom of movement valve, and by processing in the valve core of the high and low pressure hole and processing in the valve core hole on the spiral groove with servo Servo mechanism to achieve two-stage control function; in The control uses a special real-time tracking algorithm to control the continuous control of the output angular displacement by controlling the duration of each phase of the stepper motor to solve the problem that the quantization error and the response speed of the traditional step-by-step digital control components Inherent contradictions. The test results show that the main dynamic and static characteristics of the valve index has exceeded the existing specifications of different types of domestic and foreign drive and control of proportional valve performance.