Study of Robust Control Strategy for the Levitation Subsystem of Bilateral Long Primary Permanent Magnet Linear Synchronous Motor

A hybrid H2/H∞ robust control strategy is proposed and designed for a bilateral long primary magnetically levitated permanent magnet linear synchronous motor, which effectively improves the robustness and dynamics of the motor levitation subsystem. Firstly, the operation mechanism of the bilateral long primary magnet levitation permanent magnet linear synchronous motor is analyzed, the mathematical model of the motor system is established, and the traditional H∞ robust control strategy is pointed out to have the problem of not being able to consider the internal interference of the system. On this basis, a hybrid <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\mathbf{H}_{2}/\mathbf{H}_{\infty}$</tex> robust controller is proposed and designed. Finally, the experimental platform of the levitation system is built, and the proposed H2/H∞ hybrid robust control strategy is simulated and experimentally verified, and the results prove the correctness and effectiveness of the research content of this paper.