论文(19).doc

原创声明
本人王洪银郑重声明:所呈交的论文《一种磁流变线控转向路感模拟系统设计》是本人在导师邱绪云的指导下开展研究工作所取得的成果。除文中特别加以标注和致谢的地方外,论文中不包含任何其它个人或集体已经发表或撰写过的研究成果,对本文的研究做出重要贡献的个人和集体均已在文中以明确方式标明,本人完全意识到本声明的法律后果,尊重知识产权,并愿为此承担一切法律责任。
论文作者(签字):
日期: 2010 年 6 月 17 日
摘要
磁流变液在外加磁场作用下流变特性发生急剧变化,可由流动性良好的液体状态在短时间(毫秒级)内粘度增大,而呈现类似固体的状态,其强度由剪切屈服应力来表征;而且这种变化是连续、可逆的,即一旦去掉磁场后,又变成可以流动的液体。利用磁流变液的这种特性可制成各种应用装置作为电气控制与机械或结构系统间简单、安静而且响应迅速的中间装置,用于调节系统性能。磁流变液阻尼器是磁流变液的一种主要应用装置。
汽车线控转向系统(Steering-By-Wire System,简称SBW)取消了转向盘和转向轮之间的机械连接,完全摆脱了传统转向系统的各种限制,不但可以自由设计汽车转向的力传递特性,而且可以设计汽车转向的角传递特性,给汽车转向系统的设计带来无限的空间,从而减轻了驾驶员的体力负担、提高了汽车主动安全性,是汽车转向系统的重大革新。给方向盘提供合适的回正力矩是线控转向系统提高操纵稳定性的重要手段,利用磁流变液阻尼器代替路感模拟电机能够更加合理的模拟“路感”。
本文围绕磁流变液的性能和“路感”模拟做了以下工作:
(1)介绍了磁流变液的优良性能和发展前景,并设想利用旋转式磁流变液阻尼器代替电机模拟“路感”。(2)建立了线控转向系统的数学模型——转向盘回正力矩动力学模型。(3)根据得到汽车转向盘回正力矩范围,设计了旋转式磁流变液阻尼器。
关键词:磁流变液、磁流变阻尼器、线控转向、路感模感
Abstract
The action of rheological properties of orheological fluid change a lot in additional ic field, by the good liquidity in short time (liquid state within millisecond timescale) and viscosity, similar to the state, the intensity of solid characterized by shear yield stress, But this change is continuous, reversible, namely once again e ic field, remove the liquid flow can be. Using the characteristics of MRF devices can be made into various applications as electrical control system with mechanical or structure simple, quiet and quick response in the middle of the device, is used to regulate the system performance. orheological damper is a kind of MRF main application equipment.
Steering-by-wire system cancelled the mechanical connection between steering wheel and application of steer by wire system in vehicle could get away from the limitation of traditional steering system,the force transformation and the angle transformation characteristics of vehicle steering system could be freely designed,so that could bring great developing space to designer when they design the steering characteristics of the research of steer by wire system means