An Improved Model Predictive Thrust Control for Long Primary Double-Sided Linear Induction Motor

In the conventional model predictive thrust control (MPTC) of long primary double-side linear induction motor (LP- DSLIM), the speed response appears overshoot and oscillation in transient conditions. To optimize the speed control performance of the LP-DSLIM system, an improved model predictive thrust control algorithm is proposed in this paper. First, an extended state observer (ESO) is introduced into the MPTC algorithm to estimate the time-varying total resistance force. Next, the estimated total resistance force as a part of thrust reference is used to compensate for the total resistance force. This can simplify the relationship between the thrust and the speed to approximately a linear integrator. Then, the outer speed controller is designed as a proportional (P) regulator. Simulation results verify that the improved model predictive thrust control achieves a better speed response.