Test of Pressure Pulsation in Digital Hydraulic Valve Control System
Active suppression of pressure pulsation is the key technology to improve the control accuracy and reliability of digital hydraulic valve control system.However,the current active suppression method lacks an in-depth understanding of its characteristics when suppressing pressure pulsations,resulting in unsatisfactory suppression effects.Therefore,a pressure pulsation test bench was designed,and the changes of pressure pulsation at different positions in the system were analyzed.The influence of hydraulic pumps and high-speed on-off valves on pressure pulsation at different positions was further explored.The results show that the main pressure pulsation in the digital hydraulic valve control system comes from the water hammer phenomenon caused by the continuous on/off of the high-speed on-off valve,and the frequency of the pressure pulsation is always consistent with the on/off frequency of the valve.This study provides a new idea for the design of feedforward active suppression system,and also provides a reference for the development of more efficient pressure pulsation attenuator.
digital hydraulicpressure pulsationtest analysishigh-speed on-off valve
万方数据
维普
