基于线控制动系统的AEB功能开发

Functional Development of AEB Based on an Electro-hydraulic Brake System

提出一种线控制动系统的设计方案,通过试验验证该线控制动系统的制动压力控制及响应能力。该系统具备稳态压力控制精度≤±200 kPa,最大目标压力响应速度≤180 ms,作为AEB主执行器,比ESC具备更高的控制精度和更快的响应速度。AEB感知系统选用一种国内自主开发的77G毫米波雷达并进行测试验证,该雷达最多可同时追踪64个前向目标,并可对高度目标、行人/自行车目标进行有效识别。运用Matlab/Simulink及Vector/CANoe设计了AEB功能软件模块,为提高紧急制动效果,提出以制动距离为控制目标的功能逻辑,通过实车试验对所设计的AEB系统进行了验证。

The design scheme of an electro-hydraulic brake system was proposed,and the braking pressure control and the response performance of the system were measured on board and on test bench.The pressure control accuracy in steady-state is within±200 kPa and the maximum response time for the target pressure is less than 180 ms.As an actuator of AEB,the designed electro-hydraulic brake system has more accurate and faster responses than the ESC system.A 77 G millimeter-wave radar developed independently in China is selected for the AEB.The test results of the radar show that it can simultaneously track up to 64 targets and effectively recognize the air targets and pedestrian/bicycle targets.The AEB functional software module is designed by using Matlab/Simulink combined with Vector/CANoe and improves the performance of the AEB by controlling the emergency braking distance.Finally,the AEB system is verified by rapid control prototyping of the vehicle.