摘要
为了研究电动汽车EPS系统控制策略和助力特性等关键技术对汽车的操纵稳定性和转向路感的重要性,建立了EPS系统动力学模型和汽车三自由度转向动力学模型。设计了基于曲线型助力特性的EPS系统控制策略。进行了蛇形实验仿真。结果表明:蛇形实验过程中,随着车速的提高,汽车的操纵稳定性和路感随之降低;并且曲线型助力特性更具有在转向轻便性和路感之间达到理想的平衡点的优势。对于指导EPS系统的开发、兼顾汽车行驶的轻便性和路感、提高汽车行驶的操纵稳定性和安全性,以及对于电动汽车及其底盘集成控制系统的开发都具有重要的工程应用意义。
The control strategy is one of the key technologies of EPS system, and the assistance characteristic has great importance to the vehicle handiness and road feeling. Based on the EPS dynamic model and the 3-DOF full vehicle model, the EPS control strategy based on curved assistance characteristic is designed. Pylon course sla- lom situation is executed and the rusuhs shown that along with the increase in speed the handiness and road feeling are all decreased, and the curved assistance characteristic has the superiority to find the better balance between handiness and road feeling. It has engineering significance to the overall design, function enhancement and optimi- zation and steering manipulation and safety improvement, and also to the electric vehicle and its integrated chassis control system development.
出处
《科学技术与工程》
北大核心
2012年第36期9900-9904,9923,共6页
Science Technology and Engineering
基金
国家自然科学基金(50875112)
江苏省自然科学基金(BK2012586)
江苏省高校自然科学基金(11KJD580001)
汽车仿真与控制国家重点实验室开放基金(20111115)
江苏省道路载运工具新技术应用重点实验室开放基金(BM2008206010)
常州市高技术研究重点实验室项目(CM20113001)资助
关键词
电动汽车
EPS
助力特性
蛇形实验
仿真
electric vehicle EPS assistance characteristic pylon course slalom simulation
