Model reference adaptive control for permanent magnet synchronous motor servo system

A new method of the model reference adaptive control for servo system what contains crawl phenomenon in a very low speed is presented based on hyperstability theory. In this paper, the mathematics model of the PMSM is studied, and basic hypothesizes is defined. The model reference adaptive controller is designed, and its stability is proved. Finally, the method is validated by simulating. Simulation results show that the new method can eliminates environment disturbance of system, swells celerity of system, and solves crawl phenomenon in a very low speed, and improves steady-state performance, and thus a realistic new technique is provided for the design of system.