Thrust Fluctuation Suppression Method of Linear Motor Based on Mechanism-Empirical Hybrid Model

The mechanism-empirical hybrid model is one of the most popular methods for on-line dynamic modeling. In this paper, the method is applied to the thrust fluctuation suppression technology of permanent magnet synchronous linear motor. Firstly, the disturbance factors causing linear motor thrust fluctuation are analyzed, and the mechanism model of linear motor thrust fluctuation is established to suppress thrust fluctuation. Then, the linear motor empirical model is established by obtaining thrust fluctuation data from acceleration sensor, and the thrust fluctuation is suppressed by empirical model based on the mechanism model. Finally, taking a 12-slot and 14pole permanent magnet synchronous linear motor as an example, the simulation and experimental results show that the proposed method can effectively suppress the thrust fluctuation of the linear motor.