Analysis and warning of corner safety speed of curve based on vehicle structure modeling

摘要

Choosing the right speed range to drive through high-risk road sections is of great significance for ensuring driving safety. The road conditions at the corner of the road are complex and diverse. The driver relies on driving experience to drive the vehicle. It is easy to negligence and drive through the corner at a faster speed, causing the vehicle to slip and cause traffic accidents. The traditional method of solving the speed threshold usually constructs the vehicle dynamics model as a whole. Although the solution process is simplified, the influence of the vehicle structure on the model is neglected, which often causes the deviation of the calculation results. In order to improve the accuracy of the solution, this paper fully considers the vehicle structural parameters such as wheelbase, track and height, constructs the vehicle dynamics model, calculates the load distribution of the four wheels of the vehicle, selects the minimum load wheel for force analysis, and combines the road condition information to obtain Safe speed, and informs the driver in advance to make reasonable driving choices to ensure safe driving. At the same time, the curve warning system in this paper puts forward new requirements for the collection of road condition data, and calculates the safe braking distance corresponding to the road condition. In this paper, the joint simulation of MATLAB and Carsim is used. The relative error between the theoretical value and the simulated value is less than 5% and the simulated simulator is used in this paper, which proves the accuracy and reliability of the model.