A new control algorithm for energy-regulation Electro-Hydrostatic Actuator

This paper puts forward the control algorithm of the Energy-Regulation Electro-Hydrostatic Actuator (ER-EHA) based on distinguishing aiding load and reverse load working condition. According to the principle of the control algorithm, during the reverse load working condition, the system is mainly controlled by the pump control system; during the aiding load working condition, the system is mainly controlled by the valve control system, and the pump control system assists in the meanwhile, by which the generator working condition of the motor is prevented It helps reduce the energy loss and motor heating. The feasibility of this system is verified by the simulation. Compared with the EHA of fixed displacement and variable speed (EHA-FPVM), the simulation result of motor heating is reduced by nearly 35%.