Research On Adaptive Fuzzy Control For Permanent Magnet Synchronous Motor

As the actuator of speed regulating system, the permanent magnet synchronous motor ischaracterized by small volume, high efficiency, small noise, high torque per ampere, steadyperformance and so on, it is widely used in electromobile, national defense, aircraft equip,robot and so on.The dissertation studied the speed regulating method of permanent magnet synchronousmotor, it mainly focus on the improvement of the controller of system speed velocity loop.Firstly, the paper established the dq math model of permanent magnet synchronous motor andstudied the vector control method of permanent magnet synchronous motor, according to this,the vector controlled speed regulating method of permanent magnet synchronous motor basedon id=0is proposed. Secondly, the voltage space vector module technology is applied to erectthe current and speed doule closed-loop speed regulating system. As the better controlperformance can not be obtained when the control object changes in the traditional PI controlsystem, this dissertation proposed the fuzzy self-adaptation PI controlled by combing themath model that is independent of controlled plant and fuzzy control which is of highrobustness. In the Matlab/Simulink environment, the permanent magnet synchronous motorcontrol system based on the control of id=0vector which is controlled by these two differentcontroller are simulated, as is verified by the result of experiment, the proposed compoundcontroller is capable of avoiding the effect of the change of system model’s parameters.Non-linear and other uncertain factors, and the static and dynamic performance androbustness of the system are improved.During the process of speed regulation, the system is affected by kinds of factors, butthese factors are uncertain, all of this affect the Implementation of control with highperformance. As to solve this problem, indirect adaptive fuzzy controller and Lyapunov’ssynthesis are used to design to guarantee that the adaptive parameter can be adjusted on line,so as to make the output of system can converge to the reference signalvery well. Finally, theoperational process of system is simulated by Matlab/Simulink and programming. As can beseen in the result of simulation, the improved control method overcomes the problem thattraditional PI control theory is sensitive to the change of parameters and load disturbance,meanwhile, the thestatic and dynamic performance and robustness of the system areimproved.