Aiming at the coupling characteristic between the two groups of electromagnets embedded in the module of the maglev train, a nonlinear decoupling controller is designed. The module is modeled as a double-electromagnet...Aiming at the coupling characteristic between the two groups of electromagnets embedded in the module of the maglev train, a nonlinear decoupling controller is designed. The module is modeled as a double-electromagnet system, and based on some reasonable assumptions its nonlinear mathematical model, a MIMO coupling system, is derived. To realize the linearization and decoupling from the input to the output, the model is linearized exactly by means of feedback linearization, and an equivalent linear decoupling model is obtained. Based on the linear model, a nonlinear suspension controller is designed using state feedback. Simulations and experiments show that the controller can effectually solve the coupling problem in double-electromagnet suspension system.展开更多
HCN单激光器和转动光栅形成的差频信号一般不大于100 k Hz.HCN双激光器较之单激光器和转动光栅系统可以很容易的获得MHz量级的差频信号,进而可以研究更高时间分辨率的物理现象.但是HCN双激光器功率和频率都不稳定,功率稳定是频率稳定的...HCN单激光器和转动光栅形成的差频信号一般不大于100 k Hz.HCN双激光器较之单激光器和转动光栅系统可以很容易的获得MHz量级的差频信号,进而可以研究更高时间分辨率的物理现象.但是HCN双激光器功率和频率都不稳定,功率稳定是频率稳定的前提,所以必须先保证HCN双激光器功率的稳定.本文以稳定功率为目标结合双激光器的特点,设计了一套双激光器功率的自动反馈控制系统及远程控制系统.本系统主要有西门子S7-200PLC、电动平台、肖特基势垒二极管和上位机等组成.实验表明这种方法可以长时间地使HCN双激光器稳定在高功率状态.展开更多
基金Supported by National Natural Science Foundation of P. R. China (60404003)the Natural Science Foundation of Hunan Province (03JJY3108)Fok Ying-Tong Education Foundation (94028)
文摘Aiming at the coupling characteristic between the two groups of electromagnets embedded in the module of the maglev train, a nonlinear decoupling controller is designed. The module is modeled as a double-electromagnet system, and based on some reasonable assumptions its nonlinear mathematical model, a MIMO coupling system, is derived. To realize the linearization and decoupling from the input to the output, the model is linearized exactly by means of feedback linearization, and an equivalent linear decoupling model is obtained. Based on the linear model, a nonlinear suspension controller is designed using state feedback. Simulations and experiments show that the controller can effectually solve the coupling problem in double-electromagnet suspension system.
文摘HCN单激光器和转动光栅形成的差频信号一般不大于100 k Hz.HCN双激光器较之单激光器和转动光栅系统可以很容易的获得MHz量级的差频信号,进而可以研究更高时间分辨率的物理现象.但是HCN双激光器功率和频率都不稳定,功率稳定是频率稳定的前提,所以必须先保证HCN双激光器功率的稳定.本文以稳定功率为目标结合双激光器的特点,设计了一套双激光器功率的自动反馈控制系统及远程控制系统.本系统主要有西门子S7-200PLC、电动平台、肖特基势垒二极管和上位机等组成.实验表明这种方法可以长时间地使HCN双激光器稳定在高功率状态.
