Research On Adaptive Cruise Prediction Control For Electric Vehicles

With the increase of vehicle ownership comes a series of social problems,such as road traffic congestion,traffic accidents,energy demand and environmental pollution.How to solve the social problems brought by vehicles has become one of the urgent problems for vehicle researchers? Therefore,the research is very important for improving road use efficiency,reducing drivers' driving burden,improving driving safety,reducing environmental pollution and combining advanced electronic control system with new energy vehicles.The research content of this paper is as follows:(1)Build the vehicle model of distributed drive electric vehicleSelect D-class Sedan as the benchmark vehicle in CarSim,cut off the original power transmission route,and change the vehicle driving mode to four-wheel independent driving;the simulation model of permanent magnet synchronous motor was built in Simulink.Then the vehicle model and the permanent magnet synchronous motor model are connected in Simulink to build a complete vehicle model of distributed drive electric vehicle.(2)Adaptive cruise control system control strategy formulation and algorithm designFirstly,the control strategy of this paper is worked out by analyzing the current adaptive cruise system working mode and switching strategies among various modes.Secondly,considering that the safe distance model is the basis of the study of adaptive cruise control system,and whether the safe distance is reasonable directly affects the driving safety and road traffic conditions,this paper designs a forward-looking variable safe distance model.Finally,under the framework of model predictive control,a multi-objective adaptive cruise control system upper control algorithm is designed.In order to compare with it,the upper layer control algorithm of adaptive cruise control system based on linear quadratic regulator design is established.(3)Offline simulation and result analysis of adaptive cruise control systemThe electric vehicle model and the algorithm of the ACC system prototype are established,and carries on the corresponding interface connection,build distributed drive electric vehicle adaptive cruise system simulation platform,and select the working condition of cruise control,working condition of vehicle follow vehicles and variable speed drive vehicles following condition,cutting conditions and "go-stop" working condition of the ACC system control algorithm for offline simulation,and the simulation results of the adaptive cruise control algorithm based on the model predictive control and the linear quadratic regulator.Simulation results intuitive clearly proved the correctness of the ACC system control strategy and algorithm in this paper,rationality,accuracy.