为解决无人驾驶车辆在无信号保护路口左转规划中高效性与安全性相矛盾的问题,文章参考路径-速度解耦规划思路,提出一种左转规划区对角线分割(diagonal division of the planning area of left turns,DDPALT)的路径生成方法,结合基于部...为解决无人驾驶车辆在无信号保护路口左转规划中高效性与安全性相矛盾的问题,文章参考路径-速度解耦规划思路,提出一种左转规划区对角线分割(diagonal division of the planning area of left turns,DDPALT)的路径生成方法,结合基于部分可观察马尔可夫决策过程(partially observable Markov decision process,POMDP)的速度规划方法分别进行路径与速度规划,实现在环境车辆驾驶意图不确定情形下安全高效的左转规划。利用PreScan和MATLAB/Simulink联合仿真对文中提出的方法进行验证,结果表明,该方法能够让无人驾驶车辆在不确定环境中选择合适的路径并安全高效地完成左转。展开更多
Highway capacity is defined as maximum volume of traffic flow through the particular highway section under given traffic conditions, road conditions and so on. Highway construction and management is judged by capacity...Highway capacity is defined as maximum volume of traffic flow through the particular highway section under given traffic conditions, road conditions and so on. Highway construction and management is judged by capacity standard. The reasonable scale and time of highway construction, rational network structure and optimal management mode of highway network can be determined by analyzing the fitness between capacity and traffic volume. All over the world, highway capacity is studied to different extent in different country. Based on the gap acceptance theory, the mixed traffic flow composed of two representative vehicle types heavy and light vehicles is analyzed with probability theory. Capacity model of the minor mixed traffic flows crossing m major lanes, on which the traffic flows fix in with M3 distributed headway, on the unsignalized intersection is set up, and it is an extension of minor lane capacity theory for one vehicle-type and one major-lane traffic flow.展开更多
文摘为解决无人驾驶车辆在无信号保护路口左转规划中高效性与安全性相矛盾的问题,文章参考路径-速度解耦规划思路,提出一种左转规划区对角线分割(diagonal division of the planning area of left turns,DDPALT)的路径生成方法,结合基于部分可观察马尔可夫决策过程(partially observable Markov decision process,POMDP)的速度规划方法分别进行路径与速度规划,实现在环境车辆驾驶意图不确定情形下安全高效的左转规划。利用PreScan和MATLAB/Simulink联合仿真对文中提出的方法进行验证,结果表明,该方法能够让无人驾驶车辆在不确定环境中选择合适的路径并安全高效地完成左转。
基金Supported by the National Natural Science Foundation of China（50478071）
文摘Highway capacity is defined as maximum volume of traffic flow through the particular highway section under given traffic conditions, road conditions and so on. Highway construction and management is judged by capacity standard. The reasonable scale and time of highway construction, rational network structure and optimal management mode of highway network can be determined by analyzing the fitness between capacity and traffic volume. All over the world, highway capacity is studied to different extent in different country. Based on the gap acceptance theory, the mixed traffic flow composed of two representative vehicle types heavy and light vehicles is analyzed with probability theory. Capacity model of the minor mixed traffic flows crossing m major lanes, on which the traffic flows fix in with M3 distributed headway, on the unsignalized intersection is set up, and it is an extension of minor lane capacity theory for one vehicle-type and one major-lane traffic flow.
