集成电动助力转向功能的汽车主动前轮转向系统机理研究

项目名称： 集成电动助力转向功能的汽车主动前轮转向系统机理研究

项目编号： No.51205191

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 机械工程学科

项目作者： 王春燕

作者单位： 南京航空航天大学

项目金额： 25万元

中文摘要： 在汽车主动前轮转向系统基础上，集成电动助力转向技术，开发一种新型主动前轮转向系统，使其同时融合主动转向和电动助力转向功能，不仅能实现汽车转向路感和轻便性的协调统一完美结合，而且还能使汽车的安全性和灵活性完美结合，将是未来一定时期内汽车动力转向技术的主要发展方向。 建立新型主动前轮转向及整车系统动力学模型；分析系统位移传递特性与力传递特性的耦合关系，研究新型主动前轮转向系统力与位移耦合控制策略；针对系统存在的参数摄动和传感器失效问题，研究不确定性系统对传感器失效具有完整性的鲁棒容错控制规律；研究新型主动前轮转向系统的匹配关系，从人机工程学、机械工程学、汽车主动安全性等方面入手，运用多学科协同优化方法对系统的结构参数、力与位移传递特性进行优化。 通过研究上述问题，为同时具有主动转向和电动助力转向功能的新型主动前轮转向系统的开发与设计提供理论基础。

中文关键词： 主动前轮转向系统；优化设计；路感；容错控制；操纵稳定性

英文摘要： On the basis of automobile active front steering (AFS) system, a novel AFS system has been developed by integrating the technology of electric power-assisted steering (EPS). It can not only perfectly integrate steering road feel and steering portability, but also can satisfactorily harmonize the contradictory relationship between security performance and agility capability. Therefore, it will be the main developing direction of automotive power steering technology in a certain period of the future. Firstly, the dynamic models for the novel AFS and vehicle are built. Secondly, analyzing coupling relationships between the displacement transfer characteristic and the force transfer characteristic, the force-displacement coupling control strategy for the novel AFS system is studied. Then, due to the problem of parameter perturbation and sensor failure, a integrality robust fault-tolerant control strategy for the uncertainty system to the sensor failure1 is researched. Finally, on the basis of analyzing the matching relation of the novel AFS system, the structure parameters and force-displacement transfer characteristics of the system are optimized by using multidisciplinary optimization method. The aspects of man-machine engineering, mechanical engineering and automobile active safety are considered during the optim

英文关键词： Active front steering system；optimization design；road sense；fault tolerant control；handling and stability