Hybrid electro-hydraulic load sensing system and control method thereof

A hybrid electro-hydraulic load sensing system, comprising a battery, a first inverter, a second inverter, a power source, a load sensing pump, a hybrid actuator, and a first hydraulic actuator, wherein the hybrid actuator comprises a second hydraulic actuator and a load balancing actuator which are connected in parallel, the battery is connected to the power source through the first inverter and connected to the load balancing actuator through the second inverter, the power source is connected to the load sensing pump, the load sensing pump is connected to the first hydraulic actuator through a first control valve and connected to the second hydraulic actuator through a second control valve, and a first pressure sensor and a second pressure sensor are disposed at an inlet and an outlet of the second hydraulic actuator respectively;

• and
• a control device is respectively connected to the first pressure sensor, the second pressure sensor, a third pressure sensor, a motor of the load balancing actuator, and one oil control assembly in the power source and the load sensing pump;
• wherein the control device firstly initiates operation by analyzing pressure data from the first and second pressure sensors alongside incoming action signals to determine the hybrid actuator's operational mode, wherein by using the operational mode and sensor inputs, it calculates a second hydraulic actuator's load pressure (p1), and the system monitors a first hydraulic actuator's maximum load pressure (p2) through the third pressure sensor, wherein based on these pressure values (p1 and p2) and the action signals, the device coordinates two parallel control actions:
• it regulates the oil control assembly to adjust the load sensing pump's output flow, while controlling the motor to manage both magnitude and direction of the force/torque in the load balancing actuator, so that the load balancing actuator recovers a throttling loss, caused by a load difference between the actuators, and potential energy, generated in a process that the hybrid actuator drives the load to move, into the battery.