An Edge-side Power Matching Control Strategy for Electro-Hydrostatic Actuator in Turboelectric Hybrid Power Supply System

The integration of electro-hydrostatic actuators (EHAs) in more electric aircraft (MEA) introduces severe stability challenges due to their impulsive power demands and regenerative characteristics, which conflict with the slow mechanical and thermal response of turbogenerators (TGs). Existing power matching strategies typically rely on fixed-bandwidth decoupling, which often fail to simultaneously guarantee DC bus stability and protect the prime mover from mechanical stress under stochastic impulsive loading. To overcome these limitations, this article proposes an edge-side power matching control strategy utilizing a hybrid energy storage system (HESS). Unlike conventional methods, this approach features an adaptive power decoupling mechanism with a variable cut-off frequency that dynamically adjusts the load dynamics seen by the TG. This ensures the generator operates strictly within its safe thermal and mechanical ramp rates without compromising bus voltage regulation. Furthermore, to address the TG's inability to absorb regenerative power, which is a critical gap in standard symmetric droop controls, an asymmetric energy allocation strategy is proposed. This mechanism optimizes steady-state power sharing between the battery and TG in real-time based on the generator's remaining capacity. Experimental validation on a TG-based hybrid power system demonstrates that the proposed strategy achieves superior voltage stabilization and prime mover protection compared to state-of-the-art fixed-inertia control schemes.