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SY-025-BY-2毕业设计（论文）任务书学生姓名系部汽车与交通工程学院专业、班级指导教师姓名职称副教授从事专业车辆工程是否外聘是否题目名称磁流变式汽车减振器设计一、设计（论文）目的、意义分析磁流变减振器的工作模式，结合现有汽车液压筒式减振器的结构和工作特点，对磁流变减振器进行结构设计，对磁流变减振器的磁路进行设计。二、设计（论文）内容、技术要求（研究方法）（一）主要设计内容磁流变减振器的磁路设计；减振器的结构设计；对减振器的性能进行分析。（二）主要技术指标、要求零场粘度低，在相同剪切屈服应力的条件下，使磁流变的阻尼器调节范围更大；.在外加磁场作用下，磁流变体的剪切屈服强度至少达30-50kpa；在相当宽的温度范围(-40-100C)具有良好的稳定性；磁流变响应时间短(毫秒级)，使磁流变阻尼器能跟上控制系统的响应速度；三、设计（论文）完成后应提交的成果1、设计说明书一份，1.5万字以上；2、磁流变减振器装配图一张、零件图若干张，折合三张A0图纸。对所设计的磁流变减振器进行性能仿真，分析仿真结果，小论文一篇。四、设计（论文）进度安排1、进行文献检索查，查看相关资料，对课题的基本内容有一定的认识和了解。完成开题报告。第1-2周（2月28日3月11日）2、初步确定设计的总体方案，讨论确定方案；对磁流变减振器进行初步设计和选取。第3-6周（3月14日4月8日）3、提交设计草稿，进行讨论，修定。第7周（4月11日4月15日）4、详细设计液压系统，设计非标件，绘制减振器装配图及零件图。第8-12周（4月18日5月20日）5、提交正式设计，教师审核。第13-14周（5月23日6月3日）6、按照审核意见进行修改。第15周（6月6日6月10日）7、整理所有材料，装订成册，准备答辩。第16周（6月13日6月17日）五、主要参考资料1 贺建民等，磁流变减振器的分析与设计，第五届全国磁流变液及其应用学术会议，2008.102 徐伟，汽车悬架阻尼匹配研究机减振器设计，农也装备与车辆工程，2009.63 李连进，磁流变阻尼器的参数优化与特征仿真，兰州理工大学学报，2006.4六、备注指导教师签字：年 月 日教研室主任签字： 年 月 日附录A外文文献原文Magnetorheological damper car.1. Research status of magnetorheological damperMagnetorheological fluid refers to the additional magnetic field,under the action of rheological materials performance changes took place in the liq- uid.Will magnetorheological fluid into the magnetic fluid damper,though the control of magnetic field intensitymcan realize continuous magnetorhological damper,adjustable steplessly.Magnetorhelolgical damper usually adopts piston cylinder structure ,the pathway of MPF damper is on the piston or separate bypass,in the path of MRF,according to the structure of magnetic field can be divided into a bar and a single piston cylinder structure of dual pole.Magnetorheological damper can produce bigger,and according to the damping force of the external environment different easy adjustment magnetic field intensity,the change of shock absorber system to reduce vibration damping, achieve the goal.In the development of MFR devices and Lord,the Unites States and Delphi corporation in automobile damping application research holds June In 1995,the Lord of the fifth international electorheological fluids,and r- elated technologies of MRF,demonstrates a large trucks for semi-active sus- pension seat vibration isolation system p.Lord company recently issued a s- uitable automobile suspension of magnetorhological damper and Rheonetie series of current controller RD.3002.American Delphi company has developed magnet- orheological fluid using semi-active suspension system MagneRide team move suspension system applied in Seville Cadillac STS high-grade car,the suspe- nsion system can be changed according to the driving conditions.University ofVirginia utilization of magnetorhological damper Lord company in Volvo truck Fururecar heavy suspension frame for the cars on experiment,made the obvious eggect of vibration reduction.University ofMaryland and development of auto- motive air compensation structure air compensation structure of magnetorhe- ological damper.The damper adopts flow mode,simple stucture,the damping force change range is 250-1500N.Bok.CHOi Seung Korean coach suspension system is developed magnetorheological damper,dual cylinder structure,damping cylinder located at work channels in damper was design of PID controller.Laboratory tests show that:the use of magnetorheological damper can greatly improve the traffic safety and comfort.Ford motor company BASF,Germany,etc have invested heavily rd magnetorheological fluid and related componets.In the application of magnetoreohological damper is doing a lot of res- earch.Chongqing university of magnetorheological damper Liao Changrong as the design and control methods are studied,Chenjian of Shanghai jiaotong univer- sity for vehicle damping,the design of nanjing university of aeronautics Guo DALEI of magenorthological damper such vehicles in the semi-active control are studied,jingsu university on the adjustable jd.liu semi-active suspension d- amper control methods are studied,etc,damping design and control research has become hot.2.Semi-active suspension control strategy and research status.Most current semi-active suspension system is to shock absorber real-time control of damping and adjust,its essence is measured by real-time sensor of vehicles running environment and body state,the data to microprocesser control algorithm is calculated according to the optimal damper,and then control re- gulation,shock absorhers damping force to achieve the ideal damping force, imporve the performance of the suspension,one of the key technologies is to control strategy.In the semi-active suspension of 30 years,and veicle engi- neering half-anf-half active suspension control strategy for a lot of resea- rch,the representative of control method can be summarized as follows:(1) The optimal control strategy. The optimal control is simply stated in the given conditions and evaluation function for the performance of the system ,the index optimal control laws.Its theoretical basis is linear optimal control theory,though the establishment of the state equation is proposed control system,target and weighting coeff- icients in the application of target set by the control theory of optimal control law to achieve optimal control.(2) Predictive control.Predictive control refers to the road ahead through the sensor will su- spension devices to information in advance,the parameters adjustment and the actual demand synchronization and reflect the real situation in the road.附录B外文文献翻译汽车磁流变减振器1.磁流变减振器的研究状况磁流变液体是指在外加磁场的作用下，磁流变材料性能发生急剧变化的液体。将磁流变液体装入磁流变减振器，通过控制磁场强度，可实现磁流变减振器的连续、无级可调。磁流变减振器通常采用活塞缸结构，磁流变液的通路由位于活塞上的阻尼孔或单独的旁通构成，在磁流变液的通路上施加磁场，按结构可分为单出杆和双出杆活塞缸结构。磁流变减振器能够产生较大的阻尼力，而且根据外部的环境不同很容易调节磁场强度，改变减振器系统的阻尼，达到主动减振的目的。在磁流变液和器件开发方面，美国福特公司和Delphi公司都致力于汽车磁流变减振器的应用研究，福特公司早在1995年得第五届国际电流变液、磁流变液及相关技术研讨会上，展示可一种用于大型载重汽车座椅半主动悬架减振系统。福特公司最近开发了适用于汽车悬架的Rheonetie系列磁流变减振器和电流变控制器RD。3002.美国Delphi公司已经利用磁流变液开发出半主动悬架系统MagneRide3,被评为1999年世界一百项重大发明之一，2002年，MagnenRide把半主动悬架系统应用在Cadillac高档车上，此悬架系统能根据行驶情况自动改变阻尼。维吉尼亚大学利用福特公司的磁流变减振器分别在Volvo 重型卡车和轿车的悬架上进行装车试验，取得了明显的减振效果。美国马里兰大学也开发了充气补偿结构的汽车磁流变减振器。该减振器采用流动模式，结构简答，阻尼力变化范围在250-1500N。韩国Seung.Bok Choi 开发了客车悬架系统气体补偿器，双筒结构，阻尼通道位于工作缸两端，在阻尼器