通信延时环境下异质网联车辆队列非线性纵向控制

Nonlinear Longitudinal Control for Heterogeneous Connected Vehicle Platoon in the Presence of Communication Delays

针对通信延时环境下的异质车辆队列控制问题,本文提出了一种基于三阶模型的分布式非线性车辆队列纵向控制器.首先,基于三阶动力学模型描述了车辆的异质特性.考虑车辆跟驰行为以及异质通信延时,提出一种通信延时环境下的异质车辆队列非线性控制器.所提控制器不仅可以在通信延时以及车辆异质特性的影响下实现队列中车辆的位置、速度以及加速度的一致性,而且可以有效避免负的车辆间距和不合理的加/减速度,保证车辆的运动行为符合交通流理论.然后,利用Lyapunov-Krasovskii定理对车辆队列的稳定性进行分析,得出车辆队列的稳定性条件和通信延时上界.最后,所提控制器的有效性和稳定性通过数值仿真得到验证.

This paper proposes a distributed nonlinear longitudinal controller for the connected vehicle platoon in the presence of communication delay based on the third-order model.Firstly,the third-order based dynamic model is used to characterize the heterogeneity of a vehicle.A new nonlinear controller for connected vehicle platoon is proposed in the presence of car-following interactions and communication delays.The proposed controller not only can ensure the consensus for vehicles in the platoon in terms of position,velocity and acceleration/deceleration under the influence of communication delay and vehicle heterogeneity,but also effectively avoid negative spacing error and unreasonable acceleration/deceleration,so as to guarantee that the behavior of vehicles is consistent with the traffic flow theory.Then,the stability condition of the vehicle platoon and the upper bound of the communication delay are derived using the Lyapunov-Krasovskii theorem.Finally,the effectiveness and stability of the proposed controller are verified by numerical simulations.