The invention discloses a rear-end collision early warning method based on VARMA model short-time prediction. The method includes: firstly, obtaining vehicle state data based on the Internet of Vehicles and a vehicle-mounted measuring instrument; judging whether the vehicle state data is unit root non-stationary or not according to the position, speed and acceleration information of the vehicle and the leading vehicle and the weather conditions of the located road section, and respectively constructing a VARMA model, an ECM-VAR model and an estimation coefficient matrix for stationary and non-stationary data; calculating a vehicle state prediction value from t to t + h, and obtaining a prediction value of the relative distance between the two vehicles on the premise of supposing the deceleration of the front vehicle; judging the size relationship between the relative distance prediction value and the safe following distance, and sending a rear-end collision early warning report when the relative distance is smaller than the safe following distance; the method has high prediction precision, predicts the future vehicle state by means of the VARMA model, improves the rear-end collision early warning precision, and extends the early warning time span; and the method can be applied to an auxiliary driving system of the Internet of Vehicles.

    本发明公开了一种基于VARMA模型短时预测的追尾预警方法,首先基于车联网与车载测量仪器获得车辆状态数据,即本车与前导车的位置、速度、加速度信息,以及所在路段气候条件,判断车辆状态数据是否为单位根非平稳,对平稳与非平稳数据分别构建VARMA模型、ECM‑VAR模型,估计系数矩阵;计算t至t+h时刻的车辆状态预测值,并在假定前车的减速度的前提下得到两车间相对距离的预测值;判断相对距离预测值与安全跟驰距离之间的大小关系,当相对距离小于安全跟驰距离时发出追尾预警报告;本发明具有较高预测精度,借助VARMA模型预测未来车辆状态,提高追尾预警精度、延伸预警时间跨度;发明可运用于车联网的辅助驾驶系统中。


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    Title :

    Rear-end collision early warning method based on VARMA model short-time prediction


    Additional title:

    一种基于VARMA模型短时预测的追尾预警方法


    Contributors:
    SUN ZHI (author) / GUO ZHONGYIN (author) / CHENG CUNYU (author) / SONG CANCAN (author) / CHENG JINSHENG (author) / FAN XIANGXI (author) / ZHANG YANNING (author) / LIU QIJIE (author) / MENG LINGXIAO (author) / CHENG SHAOXIANG (author)

    Publication date :

    2020-06-30


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion



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