New Method of Twin-valve Independently Controlled Electro-hydraulic Vibration

Abstract

In order to improve the vibration waveforms simulation accuracy of electro-hydraulic vibration devices, a twin-valve independently controlled electro-hydraulic vibration method was proposed based on the existing rotary-valve controlled electro-hydraulic vibration method and this allows the waveforms frequency, amplitude and bias to be accurately and independently controlled in the electro-hydraulic vibration systems. A new vibration model was established based on the new method, and the output vibration waveforms of the electro-hydraulic vibration method were numerically analyzed by using MATLAB/SIMULINK. The analysis results show that the waveforms frequency is proportional to the servo motor speed. In a certain axial displacement of the two linear motors, with larger oil supply pressure comes larger vibration waveforms amplitude. In a certain oil supply pressure, with larger axial displacement of the two linear motors comes larger vibration waveforms amplitude. The bias is proportional to the difference between the axial displacement of the two linear motors. The research results show that the twin-valve independently controlled electro-hydraulic vibration method has good vibration waveforms control performance, which provides a new thought to achieve the vibration waveforms matching compensation control in a high-quality vibration condition and improve the output vibration waveforms simulation accuracy.