Stability analysis of vehicle following system with delays based on vector Liapunov function
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摘要: 为了提高自动化高速公路车辆纵向跟随控制系统的稳定性, 建立了关于车辆跟随误差的具有时间滞后的无限维非线性关联大系统模型, 应用向量李雅普诺夫函数对大系统的稳定性进行了分析。以大系统的孤立子系统的稳定性条件为基础, 在假定系统满足全局Lipschitz条件的情况下, 得到了此类大系统指数稳定的充分性判据。该判据是与时间滞后量无关的显式判据, 可方便地应用于车辆纵向跟随控制器的设计。Abstract: In order to study the stability of longitudinal following control system of vehicle in automated highway system, the following errors of vehicles were analyzed, a mathematic model of infinite-dimensional nonlinear interconnected large-scale system with delays was constructed, and the stability of the system was studied by applying vector Liapunov function. Under the assumption that the system satisfied holistic Lipschitz condition, the stability conditions of isolated subsystems decomposed from the large-scale system were regarded as base, and a sufficient condition of exponential stability on the large-scale system was obtained.Since the criterion is explicit and independent of the delays, it is easy to be applied in the design of longitudinal vehicle following controllers.
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