[关键词]
[摘要]
针对可控励磁直线同步电动机(CELSM)磁悬浮系统,提出一种区间二型模糊控制策略改善系统性能。根据CELSM磁悬浮系统的结构特点及控制原理,建立其数学模型。设计区间二型模糊控制器实现对CELSM磁悬浮系统的控制,采用磁悬浮平台气隙高度的误差及其变化率作为控制器输入,用三角形隶属度函数,建立9条模糊控制规则进行模糊推理,最后用Nie-Tan(NT)降阶算法得到系统输出。根据控制系统结构,在MATLAB软件中搭建仿真模型,经仿真验证,采用区间二型模糊控制的CELSM磁悬浮系统具有起动性能好、抗干扰能力强的优点。
[Key word]
[Abstract]
Aiming at the controllable excitation linear synchronous motor (CELSM) magnetic levitation system, an interval type-2 fuzzy control strategy is proposed to improve the system performance. Based on the structural characteristics and control principle of the CELSM magnetic levitation system, the mathematical model is established. The interval type-2 fuzzy controller is designed to realize the control of the CELSM magnetic levitation system. The error of the air gap height of the magnetic levitation platform and its change rate are used as the input of the controller. The membership function uses a triangular function, and nine fuzzy control rules are established for fuzzy reasoning. Finally, the Nie-Tan (NT) order reduction algorithm is used to obtain the system output. According to the control system structure, the simulation model is built in MATLAB software. Simulation results show that the CELSM magnetic levitation system with interval type-2 fuzzy control has the advantages of good starting performance and strong anti-interference ability.
[中图分类号]
[基金项目]
国家自然科学基金项目 (51575363)