Title :
Approximating safe spacing policies for adaptive cruise control strategies
Author :
van Willigen, W.H. ; Schut, M.C. ; Kester, L.J.H.M.
Author_Institution :
VU Univ. Amsterdam, Amsterdam, Netherlands
Abstract :
In the development of Cooperative Adaptive Cruise Control (CACC) systems, spacing policies are primarily developed for optimisation of string stability and traffic stability. However, the safety issue is hardly taken into account. Uncertainty in the communication network and sensor information makes deciding upon a safe minimal headway a non-trivial task. In this paper, we propose a model that is able to approximate the minimal safe time headway, given uncertainty of parameters with varying velocities. By simulating emergency stops, we use the difference in displacement of the cars and a desired maximum probability of a crash to approximate the minimum time headway that yields this probability of a crash. The resulting method is necessary for platooning, a major research development in vehicular networking systems.
Keywords :
adaptive control; automobiles; optimisation; probability; road safety; road traffic; stability; uncertain systems; car displacement; communication network uncertainty; cooperative adaptive cruise control system; crash probability; emergency stops; minimal safe time headway; parameter uncertainty; safe spacing policy; safety issue; sensor information; string stability optimisation; traffic stability; vehicular networking system; Acceleration; Delay; Radar; Safety; Stability analysis; Uncertainty; Vehicles;
Conference_Titel :
Vehicular Networking Conference (VNC), 2011 IEEE
Conference_Location :
Amsterdam
Print_ISBN :
978-1-4673-0049-0
Electronic_ISBN :
2157-9857
DOI :
10.1109/VNC.2011.6117118