Research And Analysis Of Lateral Semi-Active Control Strategy For High-Speed Train

Damping performance of train suspension system will affect driving smoothness and the passengers' riding comfort seriously.up till the present moment,Vertical dynamic performance of high-speed train can basically meet the requirements at runtime,But the problem of lateral vibration has not been solved effectively so far.Therefore,it is urgent to study and design control strategies for lateral vibration of high-speed train suspension system.it is one of the effective methods to restrain train lateral vibration and improve suspension lateral stability.Firstly,this paper summarizes the application and research status of active and semi-active suspension control technology for trains.Contrastive analysis shows that semi-active suspension control technology is the main trend of research,Several common strategies of semi-active suspension control are also introduced,and their advantages and disadvantages are analyzed and compared.Secondly,in view of a new method of equivalent Power Spectrum in Frequency Domain,Numerical transformation of track power spectrum of china's three main trunk lines by IFT,providing time domain simulation excitation for the establishment of train lateral dynamic model.According to the structural characteristics of high-speed train suspension system,a simplified lateral dynamic passive model of 27-DOF high-speed train is established via function module of Matlab/Simulink software.On the basis of fully studying various control strategies,This paper analyses from the angle of improving on driving smoothness and the passengers' riding comfort,several semi-active controllers are designed for lateral semi-active control of high-speed train suspension system,that are semi-active suspension control based on traditional PID control?fuzzy control?adaptive fuzzy PID control and modified Multi-modal by PSO optimization.Compared with the performance index of passive suspension,fuzzy control,PID control and adaptive fuzzy PID control are adopted under the same working conditions,four wheelsets,front and rear Bogies and body of train suspension,their lateral displacement,lateral acceleration,and roll angular displacement and roll angular acceleration of bogie and car body have better control effect,it effectively improves driving smoothness and the passengers' riding comfort.But in order to deal with the self-adjustable gain parameters and factor parameters of adaptive fuzzy PID control,Finally,a Multi-modal semi-active control strategy is improved and designed;The simulation results show that the Multi-modal,and make the high-speed train have better comprehensive performance.