长大下坡路段载货汽车行驶速度预测研究  

Study on Truck Speed Prediction in Long and Steep Downhill Sections

作　　者：王志新[1,2] 余强[1] 赵轩[1] 严慈磊 

机构地区：[1]长安大学汽车学院,陕西西安710064 [2]甘肃交通职业技术学院,甘肃兰州730070

出　　处：《公路交通科技》2017年第7期130-134,152,共6页Journal of Highway and Transportation Research and Development

基　　金：中央高校基本科研业务费专项资金项目(310822161115);甘肃省科技计划项目(1504FKCA001);甘肃省高等学校科研项目(2016A-130);甘肃省2016年省级大学生创新创业训练计划项目(201613519013)

摘　　要：为了解决重型载货汽车在长大下坡路段行驶制动器容易失效导致事故多发的问题,在下坡路段行驶制动器温升模型的基础上,运用汽车行驶方程式,结合对车辆的受力分析,对其在排气制动条件下的瞬时行驶速度进行了预测,建立了长大下坡路段车辆速度预测迭代模型。以东风EQ1108G6D13为试验车在典型长大下坡路段——青兰高速K1857~K1864段进行了道路试验,采用Racelogic VGPS车速传感器、DEWE3010型32通道数据采集仪对速度、时间和距离信号进行了实时监测与采集。试验结果表明:车辆速度预测模型所得到的速度与试验测试的速度变化趋势一致,且预测的结果与试验结果最大相对误差为2.57%,证明速度预测方法可行,可计算出车辆下长坡时的瞬时速度,进而通过制动器温升模型能够准确计算出制动器的瞬时温度,从而可实现实时监控载货汽车的制动器温度。In order to solve the high incidence of heavy-duty truck accident due to brake failure easily in long and steep downhill sections, the instantaneous speed is predicted under the condition of exhaust brake based on the brake thermal model in long and steep downhill sections with the equation of vehicle driving combining with the force analysis of the truck, and an iterative model for predicting the speed of vehicle in long and steep downhill sections is established. Using Dongfeng EQll08G6D13 as an experimental vehicle, the road experiment is conducted in a typical long and steep downhill section （ section K1875 - K1864 of Qingdao - Lanzhou expressway） to get real-time monitoring and acquisition of speed, time and distance signals by using Racelogic VGPS speed sensor and DEWE3010 32 channel data acquisition instrument. The test result shows that the changing trends of vehicle speed from the prediction model is consistent with that of test speed, and the greatest relative error of the prediction result to the test result is 2.57%, it proved the speed prediction method is feasible, the method can calculate the instantaneous speed of a truck in long and steep downhill section and even the accurate instantaneous speed of a brake with the brake thermal model to monitor the truck＇s real-time brake temperature.

关 键 词：汽车工程 货车行驶速度 测速试验 速度预测模型 行车安全 

分 类 号：U461.91[机械工程—车辆工程]