摘要
电磁永磁混合悬浮是电磁型(EMS)高速磁悬浮列车悬浮系统的发展方向之一,由于系统具有强非线性和慢时变的特点,传统的状态反馈控制在系统参数变化较大时有可能使系统失稳。本文在简要分析系统数学模型的基础上首先给出了传统的状态反馈控制器的设计方法,并在此基础上,提出了一种非线性模糊PD控制器结合线性加速度阻尼环节和线性积分环节的混合控制器。由于模糊控制器的设计过程综合了专家经验,从而使得整个系统更具有鲁棒性,并且动态特性也得到了改善,系统响应速度更快,超调量也更小。试验结果证明了该方案是正确的。
This paper presents the full digital fuzzy control of the hybrid magnets used in the levitation system of a maglev model vehicle. Because the parameters of electromagnetic suspension （EMS） system are nonlinear and time-varying, the traditional state feedback control strategy can not make the system stable at all possible operation conditions. In this paper, a novel control strategy which contains a simple and practical fuzzy proportional derivative （FPD） unit combined with an integral unit and an acceleration damping unit was developed. This configuration preserves the linear structure of the conventional state feedback controller, but has variable gains： the proportional and derivative gains are nonlinear functions of their input signals, which have self-tuning capabilities using human experience and knowledge. Because of the introduction of the fuzzy PD unit, the controller becomes much more robust with faster response time and less overshoot than its conventional counterpart. Experimental results show excellent performance of the proposed novel control schemes.
出处
《电工技术学报》
EI
CSCD
北大核心
2006年第10期76-80,共5页
Transactions of China Electrotechnical Society
关键词
混合磁极
磁悬浮
同步直线电动机
模糊控制
状态反馈控制
Hybrid magnet, magnetic levitation, linear synchronous motor, fuzzy control, state feedback control
