Research on energy flow charachteristics between elector-hydrostatic actuartor and power supply network

Abstract

The characteristics of energy feedback, high power mutation and constant power load of electro-hydrostatic actuator have impact on power supply network of aircraft. Based on the theoretical analysis, this paper establishes the layered model of electro-hydrostatic actuator and power supply network with energy characteristics for the first time, and determines the parameter setting method of key devices in the model. The motor speed and electromagnetic torque direction and energy transfer rule were obtained by simulation when electro-hydrostatic actuator was motoring or braking. Four Quadrant Operation of electro-hydrostatic actuator's impact on the power supply network is quantitative analyzed. In the case of no brake resistance, the energy feedback from electro-hydrostatic actuator makes the bus voltage of the power supply network of the aircraft far beyond the safe voltage range. Finally, the comprehensive effect of multiple electro-hydrostatic actuators on power supply network is analyzed. When multiple electro-hydrostatic actuators have the same operating instructions and the same loads, their impact on the power supply network will be superimposed. When multiple electro-hydrostatic actuators have opposite operating instructions and the same loads, their impact on the power supply network will be counterbalanced. The command of flight control actuation system and real-time aerodynamic load are the key factors affecting the impact of multiple electro-hydrostatic actuators on the power supply network. The results of this paper have guiding significance for restraining the impact of electric actuator energy consumption on the power supply network of aircraft.