HYDRAULIC PRESSURE CONTROLLER

摘要

PROBLEM TO BE SOLVED: To improve the control performance of a hydraulic pressure controller capable of compensating the characteristic change of a controlled target due to variation in the hydraulic pressure (objective pressure) of a fluid line and the valve passage flow rate of a control valve by a correction circuit and holding effective control performance. SOLUTION: The hydraulic pressure controller for executing feedback control so as to allow the pressure Pb of a port 6 on the hydraulic actuator 3 side of a proportional electromagnetic type pressure control valve 1 to coincide with a pressure command Pbr is provided with the correction circuit 30 for correcting a reference valve opening command xr calculated by a control operation circuit 11 based on a deviation between the presure Pb of the port 6 and the pressure command Pbr to a corrected valve opening command xr in accordance with the change of a DC gain of a controlled target (the actuator 3, a valve (stop part) 14 and a valve opening control circuit 13) from a DC gain reference valve K0 and the change of the time constant of the controlled target from a time constant reference value T0 .