关键词: 交通工程, 协同自适应巡航控制（CACC）, 车辆动力学, 智能驾驶员模型（IDM）

Abstract:

How to assess the impact of external conditions such as road environment on the safety of Cooperative Adaptive Cruise Control（CACC） platoon driving is particularly important to ensure road traffic safety. So the vehicle-environment and co-simulation platform are established by combining Matlab/Simulink and CarSim in order to evaluate these impacts. The US NGSIM vehicle trajectory data are used to verify the controller of adjusted previewed driver model, acceleration control model, throttle control model and brake control model. The platform is used to simulate the impact of the three road environments of red-light state, tunnel driving and ramp driving on the driving status of cooperative adaptive cruise control vehicles. The results show that the platoon can smoothly pass the traffic lights at the intersection; the direction of the platoon is good when entering and leaving the tunnel in the safe speed range; the slope of the ramp mainly affects the acceleration and the distance between the vehicles. When the slope is 3% and 5% respectively, the platoon maintains stable vehicle gaps and still can drive safely.

Key words: traffic engineering, Cooperative Adaptive Cruise Control（CACC）, vehicle dynamics, Intelligent Driver Model（IDM）