Sensorless fault-tolerant control of aviation electric fuel pump based on arctangent function sliding mode observer

In this paper, a novel fault-tolerant control method for aviation electric fuel pump driven by six-phase permanent magnet synchronous motor is proposed based on arctangent function sliding mode observer.Firstly, the paper analyzes the working principle of six-phase permanent magnet synchronous motor and external gear pump, and establishes the mathematical model of aviation electric fuel pump.On this basis, the rotor position and speed of permanent magnet synchronous motor were estimated by using arctangent function sliding mode observer, and the fault of actuator was further considered. Based on the fault model of actuator, a sliding mode fault-tolerant controller was designed to construct a sensorless fault-tolerant control system of aviation electric fuel pump.Based on Matlab/Simulink and Ansys/Fluent, the co-simulation platform of aviation electric fuel pump was built. The simulation results show that the proposed method has good fault-tolerant performance and the estimation effect of motor speed and rotor position.