Abstract:Considering on the high energy consumption, low efficiency issues of hydraulic power system, an online power monitoring method for the system was proposed and two kinds of power monitoring scheme were given. The system power theoretical soft sensing model was built, and the test rig of hydraulic power system was designed based on the drive mode of variable frequency motorgear pump. The dynamic power monitoring test was conducted, and the two speed adjustment modes of constant torque and constant power were adopted. The voltage, current, pressure, flow and power curves under different working conditions were obtained, and the characteristic of frequency control with system and the causes of pulsations of pressure and flow were analyzed.Finally, the power matching control strategy of the system, the pressure and flow pulsations mitigation measures were given based on theoretical and experimental results.