Modeling and Analysis of Load Characteristics for High-Power Electromechanical Actuators

To address the issue of inaccurate modeling in onboard electro-hydrostatic actuator (EHA) systems, particularly the neglecting of the impact of motor driver input filtering circuits and parasitic line parameters on system input current, a comprehensive mathematical model for the EHA load and onboard generation system is developed This model incorporates feedforward control based on position error compensation to ensure precise tracking of the reference signal by the actuator. Under step input position conditions, the input current waveform and DC bus voltage fluctuations are analyzed. The developed model enables accurate assessment of the impact of high-power actuators like EHA on the aircraft power supply system, providing a basis for optimizing dynamic performance.