Optimization algorithm for vehicle braking force distribution of front and rear axles based on brake strength

Abstract

The vehicle braking force distribution of front and rear axles affects its safety directly. In order to enhance the braking safety, the changes of brake strength are considered in this paper, and an optimization algorithm for braking force distribution is designed. The method is the variable ratio method, and it can change the braking force distribution rate of front and rear axles according to the brake strength variation, so its braking effect can be optimal. To verify the validity of the algorithm, two braking force distribution algorithm models with the fixed ratio and variable ratio were built in Matlab/Simulink respectively, and the simulation test was done based on the ASM model of dSPACE. The result show that the optimization distribution algorithm with variable ratio has better stability of braking direction, and higher adhesion coefficient utilization and shorter braking distance. Therefore, the optimization braking force distribution algorithm with the variable ratio is a promising method, and it can be used to improve the braking performance effectively, thereby to improve the vehicle safety ultimately.