Research on non-linear active disturbance rejection speed synchronisation control of aviation dual motor actuator considering current saturation constraints

Abstract

Electro-mechanical actuators with redundancy design use a cross-coupling control strategy to enhance the coordinated control capability of the aviation motors. Due to its linear control characteristic, traditional cross-coupling control reveals moderate dynamic response performance and synchronisation control accuracy. To further reduce the susceptibility to load torque and parameter perturbations in the application of a dual permanent magnet synchronous motor system, this paper proposes a non-linear active disturbance rejection control (ADRC)-based synchronisation control strategy. Considering the low gain problem of traditional ADRC when the speed tracking error is large, a non-linear ADRC speed controller with an efal function is designed. Meanwhile, a Levant differentiator is proposed to improve the speed tracking performance during dynamic processes. Moreover, a non-linear synchronous controller with current constraints is applied to the cross-coupling control to enhance the synchronisation convergence performance of the dual-PMSM system. Finally, simulation and experimental results demonstrate the effectiveness of the proposed non-linear ADRC speed synchronisation control.