Nonovershoot Oscillation-Free Tube-Based Prescribed Performance Speed Control for PMSM

Smooth and robust speed regulation is important for permanent magnet synchronous motor (PMSM) drives. This article proposes a novel PMSM speed control design methodology that explicitly incorporates target performance specifications into the controller synthesis, achieving nonovershoot and oscillation-free speed response. Particularly, compared with the traditional prescribed performance control (PPC), the proposed method is based on a refined tube-type performance function, which achieves unilateral convergence and has a simple structure. It has faster convergence speed and nonovershoot characteristics. Furthermore, the idea of the monotonous tube performance function is extended to the case of abrupt reference variation, in which the original PPC may lead to singularity problems and controller crashes. Besides, the inherent static error and oscillation problem of the PPC method is alleviated with an integral term combined with an antiwindup scheme. The controller effectively improves the system’s robustness and ensures the same predefined nonovershoot and oscillation-free performance under different load and speed variations. Additionally, rigorous theoretical analysis is studied via the Lyapunov stability theory. Comparative experiments are conducted on a PMSM platform. Despite diverse load conditions and references, the proposed controller delivers a smooth, overshoot-free, and robust speed response.