Research on Speed Disturbance Suppression of Permanent Magnet Linear Synchronous Motor based on Global Fast Terminal Sliding Mode Active Disturbance Rejection Control

A global fast terminal sliding mode active disturbance rejection control (G-ADRC) method is proposed to achieve the fast disturbance rejection of permanent magnet linear synchronous motor (PMLSM) speed loop. Firstly, to deal with the matter of poor parameter adaptability and anti-interference ability of traditional control method of PMSLM, active disturbance rejection controller (ADRC) is introduced to estimate and compensate the disturbance in motor operation; Secondly, Nonlinear state error feedback (NLSEF) in ADRC has some problems, such as unsmooth, poor anti-interference ability, which affect the robust control of ADRC. The global fast terminal sliding mode (GFTSM), which is susceptible to the change of PMLSM parameters and sudden interference, is introduced into the design of ADRC control law. The tracking ability and robustness of permanent magnet linear synchronous motor for given speed are improved. Finally, the simulation results indicate that G-ADRC is valid in ameliorate the response ability of speed loop and restraining the disturbance caused by load and parameter changes.