Dual-loop control strategy with a robust controller of the planar switched reluctance motor for precise positioning

This paper proposes a dual-loop control strategy using a robust controller for the emerging planar switched reluctance motor (PSRM) to achieve precise positioning. The mechanical structure and transfer functions with known parameters obtained via a forgetting factor recursive least-squares algorithm of the PSRM are first presented. Then, the description of the control strategy, the depiction of the dual-loop position control strategy with an outer-loop robust H controller and an inner proportional loop with position feedback, the design of the robust Ho controller, and the stability analysis for the PSRM are given sequentially. Additionally, the positioning of the PSRM system with the dual-loop control strategy is performed via simulation and experiment. The validity of the proposed strategy for the PSRM is finally verified through the simulation and experimental results.