MPTC-Based Multi-Objective Control Strategy for SRM-Based EMA System

In recent years, electromechanical actuators (EMA) based on switched reluctance motors (SRM) have demonstrated promising application prospects in highperformance scenarios such as aircraft braking systems due to their high reliability and low maintenance costs. However, during rapid position response processes, EMAs often experience current levels exceeding their rated values, which can lead to system overheating and reduced service life. To address the issue of overcurrent in SRMs during high-speed dynamic responses, this paper proposes an energy-saving position tracking strategy based on model predictive torque control (MPTC). First, a mathematical model of the SRM-based EMA system is established, and an improved lookup table method is used to achieve precise prediction of current and torque at time k+1. Second, a multi-objective cost function incorporating a current penalty term is designed to effectively limit the amplitude of SRM current while suppressing torque fluctuations, thereby enhancing system safety and energy efficiency. Simulation results validate the comprehensive advantages of the proposed control strategy in terms of dynamic response speed and energy-saving performance.