Force Equalization Control of Redundant Electromechanical Actuation System based on Fractional Order Controller

Dong Hou; Jianzhong Yang; Xiaozhe Sun; Cheng Yuan; Chenguang Yang

doi:10.6919/ICJE.202412_10(12).0013

Authors

Dong Hou
Jianzhong Yang
Xiaozhe Sun
Cheng Yuan
Chenguang Yang

DOI:

https://doi.org/10.6919/ICJE.202412_10(12).0013

Keywords:

Redundant Actuator System; Electromechanical Actuators; Force Fight; Fractional Order Controller; Particle Swarm Optimization; Force Equalization.

Abstract

To address the force fight problem in the fly-by-wire redundant actuation system, which poses risks to system safety during the position response process of the active-active dual redundant electromechanical actuation systems (EMAs), a feedback force equalization control method is proposed. This method targets the shortcomings of the traditional PID controller, which is characterized by poor stability and a tendency for overshoot. Instead, an optimized Fractional Order PID (FOPID) controller is adopted . This method takes the output deviation of force difference and position error of two electromechanical actuators as input, and the FOPID generates position compensation signal, so as to achieve the optimization goal of reducing force fight and improving system position response performance, Aiming at the limitation of traditional parameter tuning, the controller parameters are optimized iteratively using particle swarm optimization (PSO) algorithm. Under the command of step response and triangle wave with the maximum deflection angle of the rudder surface, by setting a serious force fight situation under the joint action of multiple disturbances to compare the control effect of PID method and FOPID method of PSO algorithm on force fight and position response, the experimental results show that FOPID can control static force fight and dynamic force fight several times more effectively than traditional PID; It can effectively improve the impact of force fight on the system.

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