Abstract
To shorten the response time of permanent magnet synchronous motor (PMSM) control system, improve the robustness of the system, and avoid the influence of system structure and parameters on the control effect, an adaptive non-singular fast terminal sliding mode control scheme based on disturbance observer (DOBANFTSMC) is proposed. Firstly, a nonsingular fast terminal sliding mode surface is used to design the sliding mode controller. Secondly, the disturbance observer is used to compensating for the unknown model of the system, so that the controller design does not need to know the structure and parameters of the system. At the same time, considering the unknown estimation error bounds of the observer, an adaptive law is designed in the controller to adjust the unknown estimation. The stability of the system is proved by the Lyapunov principle. Finally, the simulation and experimental results show that this method can track the load torque quickly, and the system has the advantages of small overshoot, small static error, fast speed, and high robustness.
Highlights
permanent magnet synchronous motor (PMSM) has the characteristics of simple structure, small size, lightweight, high efficiency, high factor, rotor heating, good overload performance, a small moment of inertia and small torque ripple
To shorten the response time of the PMSM control system and avoid the influence of system structure parameters and disturbance prior knowledge on controller design and control effect, an adaptive nonsingular fast terminal sliding mode control scheme based on disturbance observer is proposed in this paper
Remark 1: It can be seen from the above that the time required to reach the equilibrium point along the sliding surface (6) from any initial state is less than the time required for traditional nonsingular fast terminal sliding mode control
Summary
PMSM has the characteristics of simple structure, small size, lightweight, high efficiency, high factor, rotor heating, good overload performance, a small moment of inertia and small torque ripple. W. Liu et al.: Adaptive Nonsingular Fast Terminal Sliding Mode Control for Permanent Magnet Synchronous Motor controller based on disturbance estimation is a better solution. To shorten the response time of the PMSM control system and avoid the influence of system structure parameters and disturbance prior knowledge on controller design and control effect, an adaptive nonsingular fast terminal sliding mode control scheme based on disturbance observer is proposed in this paper. The third section introduces the design process and stability proof of the adaptive nonsingular fast terminal sliding mode control method based on disturbance observer. For surface mounted PMSM, the rotor field orientation control method id = 0 can achieve a better control effect At this time, formula (1) can be changed into the following mathematical model: diq dt.
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