纯电动汽车再生制动控制策略研究

Brake Energy Recovery Control Strategy for Pure Electric Vehicles

对车辆制动动力学和ECE法规进行了分析,提出一种基于全解耦式制动系统的串联式再生制动控制策略。该策略考虑了车辆制动过程中关于车速和制动强度双维度下的电控系统失效安全性,在保证车辆制动安全性与电机制动失效安全性的同时,提高再生制动能量回收率和车辆经济性。分别利用CRUISE和Matlab/Simulink搭建了整车模型和再生制动控制模型,进行联合仿真。仿真结果证明,与原控制策略相比,该控制策略能提高车辆在大制动强度制动时的能量回收率,也能提高车辆在高速、中大强度制动时的电控系统失效安全性。

First, the vehicle braking dynamics and the ECE braking regulation were analyzed and the paper proposed a tandem regenerative braking control strategy based on the full decoupled braking system. This strategy takes into account the safety performance when the electronic control system fails influenced by speed and braking intensity during the braking process, which ensures safe braking performance and at the same time improves energy recovery efficiency of the regenerative brake and vehicle efficiency. Finally, the paper used the CRUISE and Matlab/Simulink to build the whole vehicle model and the regenerative braking control model respectively, and finished the joint simulation.The simulation results prove that the control strategy can improve the braking energy recovery under the high intensity of braking compared with the original control strategy and can improve safety when the electronic control system fails under the middle and high intensity of braking.