Research On Fault Tolerant Control Of Guidance System Of High Speed Maglev Train

The special active guidance system of high-speed maglev train is taken as the research object,and the controller design and simulation experiment are carried out on the basis of establishing the mathematical model of the guidance system based on the lap structure.The fault-tolerant control of electromagnet fault,sensor fault and eddy current problem at the end of the guide system is studied.The main contents are as follows:1.Based on the analysis of the structure,working principle and control scheme of the guidance system,the mathematical model of the guidance system is established.Taking the possible disturbance and failure of the system into account,the fault model of the guidance system is established.2.The nominal controller of the guidance system is designed by using the linear quadratic optimal control method.The effectiveness of the controller is verified by simulation and the guidance platform experiment,and the characteristics of the guidance system when it is disturbed are further analyzed.3.A passive fault-tolerant structure of guiding system based on Youla parameterization is designed for guiding electromagnet fault,which can realize faulttolerant control and performance recovery when the adjacent points in the guiding lap structure fail completely.4.The active fault-tolerant control strategies based on signal reconstruction and control law switching are designed for the acceleration sensor and current sensor with high failure rate in the guidance system,which ensured that the guidance system still had good performance after the sensor failure.5.Aiming at the eddy current effect of the end-guided electromagnet,the relationship between the running speed of the train and the lost guiding force due to the eddy current effect is obtained through theoretical derivation and electromagnetic field simulation.Based on this,an end guide control algorithm considering the eddy current effect is designed.