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.