论文部分内容阅读
本文研究和设计了磁耦合离心血泵的控制系统,简要介绍了磁耦合离心血泵的结构和原理,分析了人体体循环模型。血泵性能的优劣不仅和结构材料有关,控制算法也对其有很大的影响。针对无刷直流电机,研究了电机电流双闭环控制算法;为了在不同的工作状态下算法能够自适应参数的变化,采用了自整定模糊PI控制算法,给出了模糊规则的设计方法。利用Matlab Simulink组件仿真电机控制系统检验算法的性能,并简要介绍了算法在硬件系统上的实现方法。最后搭建硬件平台进行实验,证明了自整定模糊PI控制算法能大大改善血泵的动态和稳态性能,实现了电机转速和血泵流量的稳定和可调。
This paper studies and designs the control system of the magnetic coupling centrifugal blood pump, briefly introduces the structure and principle of the magnetic coupling centrifugal blood pump, and analyzes the human body circulation model. The pros and cons of blood pump performance is not only related to structural materials, the control algorithm also has a great impact on it. For the brushless DC motor, the double closed-loop control algorithm of motor current is studied. In order to adaptively change the parameters under different working conditions, a self-tuning fuzzy PI control algorithm is adopted and the design method of fuzzy rules is given. The performance of the algorithm is verified by using the Matlab Simulink component simulation motor control system, and the implementation of the algorithm on the hardware system is briefly introduced. Finally, a hardware platform is set up to experiment, which proves that the self-tuning fuzzy PI control algorithm can greatly improve the dynamic and steady state performance of the blood pump and achieve the stability and adjustability of the motor speed and blood pump flow.