Patent ID: 11933327
Assignee: SHANDONG UNIVERSITY
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 5:
6. A drive system for a hydraulic actuator with no friction and zero leakage comprising a controller, a hydraulic pump, a proportional valve, relief valves, a plurality of pressure sensors, and a plurality of hydraulic actuators with no friction and zero leakage according to claim 1;
the hydraulic pump is connected to an oil inlet of the proportional valve, and an oil outlet of the proportional valve is connected to the drive oil access holes of the plurality of hydraulic actuators with no friction and zero leakage, respectively;
the relief valves are set on a connection pipeline between the hydraulic pump and the oil inlet, and a connection pipeline between the oil outlet and the drive oil access hole;
the plurality of pressure sensors are configured to obtain a control cavity pressure of each of the plurality of hydraulic actuators with no friction and zero leakage;
the controller is configured to calculate an output displacement of the plurality of hydraulic actuators with no friction and zero leakage according to the control cavity pressure;
the output displacement is compared with a commanded displacement to obtain a control signal, the proportional valve is controlled by the control signal.