奔腾智能混合动力电动轿车自适应巡航控制系统

Adaptive Cruise Control System of Besturn Intelligent Hybrid Electric Vehicle

为了从整车系统控制角度综合解决车辆的安全、节能和环保问题,突破目前新能源车辆领域和智能汽车领域仍各独自开展相关技术研究的限制,提出一种融合新能源汽车和智能汽车各自先进技术的解决方案—智能混合动力电动轿车,并提出融合双模式切换自适应巡航控制、整车状态识别及转矩分配控制和驱/制动系统协调控制的整车自适应巡航分层控制体系。在上层控制中研究基于实时状态反馈的双模式切换2自由度结构模型匹配控制器,解决适应混合动力驱动系统动态特性的自适应巡航期望转矩制定的难题;在中层控制中采用了综合内燃机(Internal combustion engine,ICE)优化曲线、电动机最佳效率特性和电池最佳效率特性的基线式控制策略;在下层控制中提出发动机/驱动电动机的转矩协调控制策略和电动机制动/EVB液压制动的协调控制策略。在此基础上,通过仿真分析和实车试验对分层控制系统进行评价与验证。仿真与试验结果表明,所开发的分层式控制系统确保整车在自适应巡航状态下,不仅可以有效提高整车安全性和降低驾驶强度,而且使整车具有最佳的燃油经济性和排放性能。

In order to achieve comprehensive vehicle safety,energy conservation and environmental protection,and break through the current isolated research on the clean energy vehicle and intelligent vehicle,a novel solution-intelligent hybrid electric vehicle （IHEV） is proposed,which integrates the advanced technologies of both clean energy vehicle and intelligent vehicle.Based on the presented IHEV,the adaptive cruise control（ACC） system with hybrid propulsion system is developed.The hierarchical control structure,which is integrated with double mode switch adaptive cruise control,multiple energy management,driving/braking system coordinate control,is proposed and applied to the vehicle control system.To obtain fast and accurate system response,in the top layer,the problem of driving systems＇ dynamic characteristics during various hybrid driving modes is studied,and a double modes switch controller with 2 DOF model matching method based on real-time hybrid state feedback is designed.In the middle layer,with the aim of gaining the highest fuel efficiency and lowest emission,a rule based optimal internal combustion engine（ICE） torque and motor battery efficiency control strategy is applied.In the bottom layer,the engine/motor coordinate control strategy and EVB-hydraulic /motor coordinate control strategy are studied and applied.The simulation and experiment are implemented then,and the results show that,with the hierarchical control structure,IHEV ACC system can not only improve vehicle safety and lower driving fatigue,but also optimal advanced fuel economy and emission performance.