Fuzzy Position Tracking Control Method for Permanent Magnet Synchronous Motor Based on State Constraint

Abstract

The invention discloses a limited state-based permanent magnet synchronous motor fuzzy position tracking control method. According to the method, the problems of non-linearity and iron loss existing in electric automobile motor driving and control systems are solved; the state quantity and the control quantity of the motor system are restrained on the basis of a Barrier Lyapunov function, meanwhile, and a fuzzy logic system is utilized to approach a nonlinear function in the system, and a fuzzy self-adaptive position tracking controller is constructed. According to the method disclosed by theinvention, the tracking error of the system can be ensured to be converged into a small enough neighborhood of the original point; and the simulation result shows that the state quantities of the motor are ensured to be in the constraint space of the system by virtue of the method of the invention, and the input of the controller is stable in a bounded region. According to the method, the rapid and effective response of the position tracking control of the permanent magnet synchronous motor of the electric vehicle is realized, and the method is more suitable for a control object requiring rapid dynamic response such as an electric automobile driving system.

Description

technical field [0001] The invention belongs to the technical field of electric vehicle motor position tracking control, in particular to a state-limited fuzzy position tracking control method for permanent magnet synchronous motors. Background technique [0002] Since the international financial crisis, the United States, Europe, Japan, South Korea and other developed countries are promoting the transformation and development of the automobile industry. Electric vehicle (EV) is a clean, efficient and sustainable means of transportation in the 21st century, thus forming a new round of upsurge in the development of new energy vehicles worldwide. Among all technological innovations, motor drives play an extremely important role, because future drive methods must have the characteristics of low energy consumption, high environmental protection, and strong sustainability. [0003] Electric vehicles include mechanical systems such as motor drive and control systems, driving forc...

AI Technical Summary

Problems solved by technology

Since the system mathematical model of permanent magnet synchronous motor is nonlinear, including nonlinear coupling items of current and speed, the single slave control quantity cannot guarantee that the state quantity of the system is always in the desired constraint space

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