摘要
磁悬浮系统是典型的非线性迟滞系统,难以建立精确的数学模型,应用常规PID控制难以取得良好的控制效果。为解决这一难题,针对磁悬浮系统设计出了Fuzzy-PID分级控制器,它结合了模糊控制超调小、稳定性和鲁棒性好以及PID控制快速性、精度高的优点;同时是一种无固定阈值无触点的切换方式,基于模糊规则的切换保证了两种控制方式间的平稳过渡,因而具有良好的跟踪设定值能力和较好的抗干扰能力。通过Matlab软件进行了磁悬浮无刷直流发电系统仿真,仿真结果表明,Fuzzy-PID分级控制增强了系统的抗干扰能力,具有很强的鲁棒性。
MagJev brushless DC generator （BLDG） is adopted in the wind power generation systems （WPGS）, which has the advantages of high-speed, no-lubricating, no-wearing, no-mechanical noise, no-sealed, high-degree of accuracy and long life. The maglev system has the nonlinear and hysteresis characteristics, It is difficult to establish exact model, and obtain good control effect by applying general PID control. In order to solve the problem, designed the Fuzzy switched Fuzzy--PID controller （FSFC） was designed for maglev system. The FSFC combines the advantages of Fuzzy control and PID control such as tiny overshoot, good stability, speediness and high precision. The switching based on the fuzzy rule makes the transition calm and stable. So it has the strong ability of tracking the provision value and anti-jamming. The simulation on the Maglev brushless DC generator system was made with Matlab/ Simulink, the result shows that FSFC improves the ability of resisting disturbance of the system, which has strong robustness.
出处
《机床与液压》
北大核心
2008年第B07期276-278,255,共4页
Machine Tool & Hydraulics
关键词
风力发电
磁悬浮系统
无刷直流发电机
模糊PID分级控制
Wind power generation
Maglev system
Brushless DC generator
Fuzzy switched Fuzzy--PID controller
