长行程大推力分段直线电机的模糊PI控制

With the propulsive force and efficiency requirements of the electromagnetic launch system, permanent magnetic linear synchronous motor (PMLSM) is investigated in the launching system. In this paper, the long primary short secondary PMLSM used in electromagnetic launch system is designed, whose winding in the primary is divided into two sections. The control system employs two inverters and two current trackers, and the latter are adopted to track the 3-phase currents in the other section when the mover is in the cross section, so as to make the magnetic field excited by the two windings move forward smoothly, and the repulsive force steady. With regard to the system nonlinearity and model variation, the fuzzy PI regulator is designed to adjust the mover velocity. In contrast to the conventional PI regulator, the results show that the repulsive force is steady and the velocity reaction is quick without overshoot in the cross section. The method proposed here is validated by the results.