ELECTROHYDRAULIC SERVO DRIVE Russian patent published in 1998 - IPC

FIELD: automatic control systems. SUBSTANCE: electrohydraulic servo drive has master unit of turn of drive axle, master unit of rotation speed of drive, comparator, summing amplifier, hydraulic control booster, control cylinders, regulation element of pump connected to sensor of angular position of it, pump which outlets are connected to inlets of pressure transducers, hydraulic motor which output is connected to transducer of speed of actuating axle and via reduction gear to object of control and comparator. Source of mechanical energy is linked via second reduction gear to second inlet of pump and to transducer of speed of pump shaft whose output is connected to second input of transducer of turn of regulation element of pump. Drive also incorporates second comparator and limiting element. EFFECT: enhanced operational reliability thanks to decrease of peak values of pressure difference in drive. 1 dwg