基于模糊滑模变结构的永磁同步电机矢量控制研究

发布时间：2017-12-27 08:38

本文关键词：基于模糊滑模变结构的永磁同步电机矢量控制研究　出处：《安徽工程大学》2015年硕士论文　论文类型：学位论文

【摘要】：永磁同步电机(Permanent Magnet Synchronous Motor—PMSM)结构简单、运行可靠、抗干扰力比较强、跟踪误差较小、超调量较小、响应快速,又具有体积小、效率高、力矩大鲁棒信好等各种优点,因此已经在众多伺服控制领域中得到了普遍的应用。本文的研究是基于模糊滑模变结构控制的PMSM矢量控制。本文先从PMSM的数学模型出发,介绍PMSM的数学模型以及其的控制理论和磁链跟踪控制技术(SVPWM)。然后利用MATLAB/simulink仿真软件,搭建永磁同步电机的矢量控制系统的仿真模型,并对双闭环下永磁同步电机的矢量控制系统进行仿真实验。目前永磁同步电机的矢量控制系统大都采用PID控制,但是永磁同步电机的矢量控制系统本身具有非线性、复杂性和时变性等特性,使得普通PID控制难以获得较好的控制特性。滑模变结构控制存在抖振的危害,指数趋近律能够有效的消弱抖振,却不能去除抖振；在此基础上,分析模糊控制的优式,可以有效的消除抖振。为了提升PMSM伺服系统的控制特性,本文通过采用基于模糊滑模变结构控制的速度控制方法。通过模糊滑模变结构控制器对速度调节器进行优化,此算法根据电机运行过程中速度的变化量,通过模糊控制规则对滑模变结构控制中的两个参数(k,ε)进行在线调节,进而达到优化的目的。同时通过对模糊滑模变结构控制、滑模变结构控制及普通PID控制的三种速度控制器的PMSM矢量控制进行仿真实验,并对实验结果进行细致分析和比较,结果表明基于模糊滑模变结构控制的永磁同步电机矢量控制相对于基于普通PID控制器的及基于滑模变结构控制的永磁同步电机矢量控制系统具有速度响应快、超调量少、速度波动小等优点,其鲁棒性及动静态性能都相对优于普通PID控制器的及基于滑模变结构控制的永磁同步电机矢量控制。在相关控制原理和控制策略基础上结合矢量控制系统的仿真实验研究上,从硬件系统构建的整体思路出发,进行设计以数字信号处理器(DSP) TMS320LF2407A为核心的永磁同步电机矢量控制硬件系统,并阐述TMS320LF2407A的最小系统及其外围电路、主功率电路、检测及保护电路等。以CCS 3.3 (Code Composer Studio 3.3)为软件平台,从永磁同步电机矢量控制系统的控制思路出发,分别详细对系统的主程序、中断服务子程序以及控制算法进行设计与说明。在系统软硬件的基础之上对系统进行调试和测试。
[Abstract]:Permanent magnet synchronous motor (Permanent Magnet Synchronous Motor PMSM) has the advantages of simple structure, reliable operation, strong anti-interference capacity, the tracking error is small, small overshoot, fast response, and has the advantages of small size, high efficiency, large torque and good robust signal, so has been in many fields to get a servo control universal application. The research of this paper is based on the PMSM vector control of fuzzy sliding mode variable structure control. Starting from the mathematical model of PMSM, this paper introduces the mathematical model of PMSM and its control theory and magnetic chain tracking control technology (SVPWM). Then, the simulation model of permanent magnet synchronous motor vector control system is built by using MATLAB/simulink simulation software, and the simulation experiment of vector control system of double closed loop permanent magnet synchronous motor is carried out. At present, most of the vector control systems of permanent magnet synchronous motor are controlled by PID. However, the vector control system of PMSM is nonlinear, complex and time-varying, which makes it difficult for ordinary PID control to get better control characteristics. The sliding mode variable structure control has the danger of chattering. The exponential reaching law can effectively weaken chattering, but it can not eliminate chattering. Based on that, the analysis of fuzzy control's superiority can effectively eliminate chattering. In order to improve the control characteristics of the PMSM servo system, the speed control method based on fuzzy sliding mode variable structure control is adopted in this paper. A fuzzy sliding mode variable structure controller is used to optimize the speed controller. According to the speed change in the motor running process, the algorithm adjuster the two parameters of the sliding mode variable structure (k, e) online by fuzzy control rules, so as to achieve the purpose of optimization. At the same time through the simulation of PMSM vector of variable structure control, sliding mode variable structure control and conventional PID control in the three kinds of speed controller of fuzzy sliding mode control, and the experimental results are detailed analysis and comparison results show that the fuzzy sliding mode variable structure control of permanent magnet synchronous motor vector control compared with conventional PID controller and PMSM motor vector control system based on sliding mode variable structure control with fast response, less overshoot, speed advantages such as small fluctuations based on its robustness and dynamic performance are relatively better than the ordinary PID controller and based on permanent magnet synchronous motor vector control sliding mode variable structure control. The control principle and control strategy based on the combination of simulation and Experimental Research on vector control system, starting from the overall train of thought of construction of the hardware system, designed based on digital signal processor (DSP) TMS320LF2407A permanent magnet synchronous motor vector control hardware system as the core, and describes the TMS320LF2407A minimum system and peripheral circuit, power circuit, detection and protection circuit etc.. Taking CCS 3.3 (Code Composer Studio 3.3) as the software platform, starting from the control idea of PMSM vector control system, the main program, interrupt service subroutine and control algorithm of the system are designed and explained in detail. The system is debugged and tested on the basis of the software and hardware of the system.
【学位授予单位】：安徽工程大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM341

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