An Improved Variable Time Headway Strategy For ACC

The spacing strategy is the basis of the adaptive cruise control strategy, it plays an important role in the design of the ACC system. It requires us to allocate the car spacing according to the environment in which the vehicle is traveling, and improve the utilization of the road under the premise of ensuring driving safety. The fixed-pitch spacing strategy is not suitable for complex driving environments, while the variable spacing strategy has certain disadvantages in terms of stability and security. This paper combines the advantages of nonlinear spacing strategy, improves the VTH strategy based on the previous studies, and verifies the convergence of the improved model through mathematical analysis. Finally, the simulation models were built in matlab environment, and the five classics folowing-control states of ACC were simulated. The simulated results have verified the effectiveness of the improved model.