无刷直流电机调速系统控制策略研究

发布时间：2018-01-22 11:06

本文关键词： 无刷直流电机 MATLAB/Simulink仿真模型动态Terminal滑模控制器直接转矩控制 Anti-windup PI控制器　出处：《河北工程大学》2015年硕士论文　论文类型：学位论文

【摘要】：有刷直流电机的机械接触式换相易产生换相火花和机械磨损,不利于电机的长久运行。无刷直流电机取长补短,摒弃了机械接触式换相,采用电子换相,具有效率高、结构明了、易于控制等优点,应用范围已遍布工业生产、航空航天和自动化办公等多项领域。所以,为了提供更多的理论支持,对无刷直流电机领域的研究就被赋予了更多的现实意义。本文针对无刷直流电机调速控制系统中的速度控制器设计了两种控制算法,具体工作总结如下:首先,介绍了本课题的研究背景及意义,论述总结了无刷直流电机及其控制策略现阶段的研究状态和未来的发展方向。其次,在给出了无刷直流电机结构组成和工作原理的前提下,通过公式推导得到了电机的数学模型,并利用MATLAB/Simulink对无刷直流电机调速控制系统进行了仿真模型的搭建,通过仿真验证了模型的正确性。然后,在动态Terminal滑模控制理论的基础上,结合数学模型设计了滑模速度控制器。针对传统PID速度控制器不能很好地满足无刷直流电机这种变量多、耦合强、复杂系统的控制精度要求,设计了动态Terminal滑模控制器,结果表明,该控制器可使系统状态在有限时间内收敛到期望值,改善了系统稳态跟踪速度和控制精度效果。最后,在无刷直流电机直接转矩控制系统中,设计了新型模糊变结构抗饱和Anti-windup PI控制器。针对系统速度控制器中存在的Windup问题,设计了变结构抗饱和Anti-windup PI控制器,并利用模糊理论对控制器参数进行在线调整,通过仿真可知,当控制器进入饱和状态,通过调节可使系统尽快进入线性区并减小了超调量,得到了更好的实时性和快速性,实现了系统的无静差调节。
[Abstract]:The mechanical contact commutation of brushless DC motor is easy to produce commutative sparks and mechanical wear, which is not conducive to the long running of the motor. The brushless DC motor compensates for each other's weaknesses, so the mechanical contact commutation is abandoned and the electronic commutation is adopted. It has many advantages, such as high efficiency, clear structure, easy to control and so on. It has been used in many fields such as industrial production, aerospace and automation. So, in order to provide more theoretical support. The research on brushless DC motor has been given more practical significance. This paper designs two control algorithms for the speed controller of brushless DC motor speed regulation control system. The specific work is summarized as follows: first of all. This paper introduces the research background and significance of this topic, discusses and summarizes the brushless DC motor and its control strategy at the present stage and the future development direction. The mathematical model of brushless DC motor is derived by formula under the premise of giving the structure and working principle of brushless DC motor. The simulation model of brushless DC motor speed control system is built by using MATLAB/Simulink, and the correctness of the model is verified by simulation. Based on the dynamic Terminal sliding mode control theory, the sliding mode speed controller is designed based on the mathematical model. The traditional PID speed controller can not satisfy this kind of variable of brushless DC motor well. The dynamic Terminal sliding mode controller is designed for the strong coupling and complex system control precision. The results show that the controller can make the state of the system converge to the expected value in a finite time. The steady-state tracking speed and control accuracy of the system are improved. Finally, in the brushless DC motor direct torque control system. A new type of fuzzy variable structure anti-saturation Anti-windup Pi controller is designed, and the Windup problem in the system speed controller is addressed. The variable structure anti-saturation Anti-windup Pi controller is designed, and the fuzzy theory is used to adjust the controller parameters online. The simulation results show that when the controller enters saturation state. By adjusting, the system can enter the linear region as soon as possible and reduce the overshoot, and get better real-time and rapidness.
【学位授予单位】：河北工程大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM33

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