Integrated Simulation Of High Speed Railway Vehicle-Bridge Coupling System Dynamics And Control

Vehicle running on the bridge, the dynamic interaction occurs between the vehicle and bridge, with the rise of high speed railway, this interaction become more apparent, and thus become more attention, which also promoted the dynamic interaction of vehicle and bridge theory’s development. Today, the vehicle-bridge coupling system dynamics theory is quite mature, theoretical analysis has been able to substitute to some extent experimental work. However, with the technological development, Mechanical and electronic technology is applied gradually in modern vehicles suspension system design. At present, the suspension system already from traditional passive suspension development to active suspension stage, suspension is the key components of vehicle, for vehicle-bridge coupling system, vehicle dynamic performance directly related to bridge’s dynamic behavior, so, how to assess the active suspension technology for dynamic behavior of vehicle-bridge coupling systems is a new problem, that is the problem of vehicle-bridge coupling dynamics and control. The purpose of this research work is how to solve this problem, mainly as follows:1. Based on the vehicle-bridge coupling system dynamics theory, using MATLAB/Simulink and ANSYS, vehicle-bridge coupling system dynamics simulation platform with object-oriented features SimVB was constructed.2. Digital simulation model of vehicle active suspension control system was built with MATLAB / Simulink. As SimVB simulation platform object-oriented features, it can easily be integrated with the SimVB simulation platform, and achieve the simulation of vehicle-bridge coupling system dynamics and control.3. H∞robust controller for active suspension was designed using linear matrix inequality approach. Using the SimVB with active suspension control system, take the Lateral active suspension vehicle and the 64m steel deck truss bridge dynamic interaction problems as an example, the simulation of active (passive) vehicle and bridge dynamic interaction was done and at same time the simulation to evaluate the effect of the three factors closely related with the active suspension control level and robust performance such as actuator weights, sensor noise and vehicle model perturbation for the active lateral suspention vehicle - bridge coupling system dynamic performance was done too.