基于操纵信号的小客车专用高速平曲线驾驶特性

Driving Characteristics of Horizontal Curve of Passenger Car Expressway Based on Manipulation Signal

利用驾驶模拟软件设计并实施了小客车专用高速平曲线路段仿真实验,并对平曲线驾驶特性进行了分析。结果表明,不同半径平曲线路段均满足速度变化绝对值和速度梯度绝对值的协调性要求;小半径曲线路段起弯、回正点滞后严重,分别比直缓点和缓直点晚了100 m和30 m,操作负荷主要受曲率变化的影响;不同转向和半径的平曲线均会造成内侧和外侧偏移,随着半径的减小,车道偏移增加并向内侧集中,同时横向位置更稳定。

Driving simulation software was used to design and implement the simulation experiment of horizontal curve of passenger car expressway.Then,the driving characteristics of horizontal curve were analyzed.It is shown that all horizontal curves with different radii satisfy the consistency of absolute speed change and absolute speed gradient.The starting points and returning points of small-radius curves lag significantly,which are 100 m later than the tangent-to-spiral points and 30 m later than the spiral-to-tangent points,respectively.Additionally,the operation load is mainly affected by curvature variation.Horizontal curves with different turns and radii cause inner and outer lane departures.As the radius decreases,the departures increase and concentrate toward inside of the curve with a more stable lateral position.