电液激振器, 高频, 同步控制, 振动试验

A mathematical model of electrohydraulic vibration exciter was established; the relation among piston displacement of cylinder, the rotary speed and axial sliding of spool was studied by using the numerical simulation program in Runge-Kutta method, the phase-frequency waveform of the exciter was given and discussed. Finally the test equipment was established to verify the simulation results. It is classified that phase difference is changed little while the ratio value between the excitation frequency and natural frequency is in 0.048~0.870. So the phase synchronization can be achieved in multi-axis fatigue test system consisting of electrohydraulic vibration exciter controlled by 2D valve among that frequency band.