| Abstract: | To further improve tracking, safety, comfort and fuel economy during vehicle following, a predicted constant time headway strategy is proposed to overcome the shortcomings of the existing spacing strategies,which often show responses that are either overly conservative or excessively reactive. This strategy incorporates relative acceleration to build a predictive desired inter-vehicle distance model. When integrated into the multi-objective adaptive cruise control system using model predictive control, this model enhances the comprehensive coordination capabilities of the system for multiple control targets. The paper developed an upper-level controller, a lower-level PID controller, throttle brake switching, and an inverse longitudinal dynamics model. Simulations were conducted under various conditions, and performance evaluation indicators were established to quantitatively analyze multiple targets. The results show that, while ensuring safety, the proposed spacing strategy improves the overall performance of the adaptive cruise control system. Under the time headway of different driving styles, the system exhibits good performance in tracking, comfort and fuel economy. |
