High speed on/off valves (HSV) have often been used to control flow or pressure in digital hydraulic systems due to higher switching frequency. However, the dynamic performance and energy efficiency are highly affected by the supply pressure and the carrier frequency. In this paper, a new adaptive PWM control method for HSV based on software is proposed. The proposed adaptive PWM consists of a reference PWM, an excitation PWM, a high frequency PWM, and a reverse PWM. First, the nonlinear model of the HSV was established, and the structural composition and working principle of the proposed adaptive PWM control strategy were presented. Secondly, individual feedback controllers for the excitation PWM, the high frequency PWM, and the reverse PWM were designed, respectively; and each of the individual feedback controllers was experimentally verified. Finally, the comparative experimental results demonstrated that, with the proposed adaptive PWM control, the rising delay time of the control pressure drastically reduces by 84.6 % (from 13 ms to 2 ms), the duty cycle's effective range remains large (12 %-85 %) even with high carrier frequency (100 Hz), and the temperature rise of the valve's coil shell is reduced by 61.5 %, compared to the three-voltage control. In addition, the dynamic performance and the energy efficiency of the HSV are not affected by the supply pressures and carrier frequencies, which proves that the proposed control strategy can improve the robustness and stability of the valve system.

由于开关频率较高，高速开关阀（HSV）通常用于控制数字液压系统中的流量或压力。但是，动态性能和能效受供应压力和载频的影响很大。提出了一种基于软件的HSV自适应PWM控制新方法。提出的自适应PWM由参考PWM，励磁PWM，高频PWM和反向PWM组成。首先，建立了HSV的非线性模型，提出了自适应PWM控制策略的结构组成和工作原理。其次，分别设计了励磁PWM，高频PWM和反向PWM的单独反馈控制器。并对每个反馈控制器进行了实验验证。最后，对比实验结果表明，通过提出的自适应PWM控制，控制压力的上升延迟时间急剧减少了84.6％（从13 ms减少到2 ms），占空比的有效范围仍然很大（12％-85） ％），即使在高载波频率（100 Hz）的情况下，与三电压控制相比，阀的线圈壳的温升也降低了61.5％。此外，HSV的动态性能和能效不受供应压力和载频的影响，证明了所提出的控制策略可以提高阀系​​统的鲁棒性和稳定性。6％（从13 ms到2 ms），即使在高载波频率（100 Hz）的情况下，占空比的有效范围仍保持较大（12％-85％），并且阀线圈壳的温度升高降低了61.5％，相比三电压控制。另外，HSV的动态性能和能效不受供应压力和载频的影响，证明了所提出的控制策略可以提高阀门系统的鲁棒性和稳定性。6％（从13 ms到2 ms），即使在高载波频率（100 Hz）的情况下，占空比的有效范围仍保持较大（12％-85％），并且阀线圈壳的温度升高降低了61.5％，相比三电压控制。此外，HSV的动态性能和能效不受供应压力和载频的影响，证明了所提出的控制策略可以提高阀系​​统的鲁棒性和稳定性。