Study on adaptive Cruise control spacing policy and stability analysis

Spacing Policy is an integral part of Adaptive cruise control (ACC) system and determines the performance of ACC system in safety, driving comfort and fuel consumption. The traditional variable spacing policy fails to consider the acceleration of the previous vehicle, and it performs poor when velocity of the previous vehicle changes frequently. To solve this problem, this paper takes into account the impact of previous vehicle acceleration on time headway, improves the traditional policy, and proves the stability of improved spacing policy. The simulation result proves that the improved policy has better dynamic performance, works better in safety, comfort and fuel consumption, and has good stability.