ELECTROHYDRAULIC CONTROL SYSTEM Russian patent published in 2019 - IPC F15B9/04 

FIELD: control systems.

SUBSTANCE: system is designed to control movement of various control objects. System comprises an adjustable pump with a pressure regulator, a tank connected to the pump suction inlet, one or more electrohydraulic drives, each of which comprises hydraulic motor, kinematically connected to its control object, proportional hydraulic distributor with spool position sensor, adder, control panel, pulse-width modulator, control object relative position sensor, differentiating link, LS valve, hydraulic lock, wherein pump outlet is connected to hydraulic inputs of each electrohydraulic drive and then in each electrohydraulic drive is connected to pressure inlet of proportional hydraulic distributor through LS valve, drain line of proportional hydraulic distributor is connected to drain line of electrohydraulic drive and then to tank, outputs of pulse-width modulator are connected to control inputs of proportional hydraulic distributor, output of the hydraulic distribution valve spool position sensor is connected to the adder inverting input, the adder output is connected to the pulse width modulator input, output of relative position sensor through differentiating link is connected to second inverting input of adder, control input of LS valve through LS channels of proportional hydraulic distributor is connected to output hydraulic lines of proportional hydraulic distributor, at that, said system incorporates pressure dampener and control device to compute required delay time for hydraulic lock actuation upon control signal occurrence.

EFFECT: preventing unauthorized movement of a control object in the initial period of guidance and repositioning to given coordinates.

1 cl, 2 dwg