In this paper connected cruise control(CCC) system is studied,which adds devises for commu-nication between vehicles on the basis of traditional adaptive cruise control(ACC) system to acquire information of surrounding vehicles for enhancing road traffic efficiency and safety. Hierarchical control strategy is developed for CCC on a drive-by-wire electric vehicle,in which a control algorithm with acceleration feedforward control and error feedback control is adopted in upper-layer control, and acceleration and braking look-up tables and the switching rule between acceleration and braking are designed for lower-layer control based on test data. The effects of time headway on platoon driving stability are analyzed in both frequency and time domains. The results of real vehicle test show that compared with traditional ACC system,CCC system can achieve faster and more accurate response,with a less time headway which ensurs platoon driving stability.%本文中的联网巡航控制系统是在传统自适应巡航控制系统的基础上增加车间通信设备来获取周边车辆信息,以提高道路通行效率和安全性.针对线控纯电动汽车,开发了联网巡航分层式控制策略.在上层控制中采用了加速度前馈加误差反馈的控制算法;在下层控制中基于试验数据设计了加速和制动的查询表以及加速/制动的切换规则.从频域和时域两方面分析了不同车间时距对队列行驶稳定性的影响.实车试验结果表明:与传统的自适应巡航控制相比,所设计的联网巡航控制系统可实现更快速而准确的控制响应,而能保证队列行驶稳定性的车间时距更短.
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