基于PC-Crash的大型车辆转弯盲区预警控制模型仿真研究

Simulation on turning blind area early warning control model for large vehicle based on PC-Crash

大型车辆在转弯的时候,前后车轮的运动轨迹并不一致,形成内轮差,车子的后半部分车轮对弯道内侧的行人及车辆产生巨大的威胁。针对大型车辆转弯盲区智能预警系统的控制模型开展仿真研究。首先PC-Crash仿真软件构建车辆模型,选取车辆轴距和转弯半径参数进行转弯行驶内轮差影响规律仿真分析,当转弯半径和轴距对内轮差影响的变化规律如下:随着转弯半径的增大,半挂汽车转弯的内轮差逐渐减小;随着轴距的增加,半挂汽车转弯的内轮差逐渐增大的变化规律。然后利用PreScan仿真试验确定车辆不同转弯角度的转弯盲区以及相应的车载雷达探测角度,并建立转弯角度-内轮差-雷达探测角度模型方程,用于大型车辆转弯盲区智能预警方案设计,以降低或消除汽车在转弯行驶时行车安全风险。

When a large vehicle is turning,the movement trajectory of the front and rear wheels is not consistent,forming an inner wheel difference.The rear half of the vehicle′s wheels pose a huge threat to pedestrians and vehicles on the inside of the curve.This article conducts simulation research on the control model of the intelligent warning system for large vehicle turning blind area.Firstly,PC-Crash simulation software was used to construct a vehicle model,and the parameters of vehicle wheelbase and turning radius were selected for simulation analysis of the influence of wheel difference during turning driving,the variation law of the influence of turning radius and wheelbase on the inner wheel difference was as follows:as the turning radius increases,the inner wheel difference of the semi-trailer car during turning gradually decreases;as the wheelbase increases,the variation pattern of the inner wheel difference of a semi-trailer car during turning gradually increases.Then,PreScan simulation experiments were used to determine the turning blind area of vehicles at different turning angles and the corresponding onboard radar detection angles.A turning angle inner wheel difference radar detection angle model equation was established for the design of intelligent warning schemes for large vehicle turning blind area,in order to reduce or eliminate driving safety risks during turning.