




下载本文档
版权说明:本文档由用户提供并上传,收益归属内容提供方,若内容存在侵权,请进行举报或认领
文档简介
1、 2922 Farong Kou et al. / Energy Procedia 13 (2011 2916 2924 Farong Kou et al. / Energy Procedia 00 (2011 000000 7 Fig.7. Vehicle test instruments Step-input test for coach is performed in 75km/h speed and 1.4 rad steering wheel angle. Steering wheel angle is transformed as nominal fore wheel turn a
2、ngle f by transmission ratio of 20.2:1. Nominal fore wheel angle used in simulating input is given as 0 (0 t 0.2 = f 0.0691(t 0.2 (0.2 < t 1.20 (t > 1.20 0.0691 (30 The results of tests and simulations are shown in fig.8. Horizontal ordinate stands for time t and longitudinal ordinate stands f
3、or yaw rate r and nominal fore wheel angle. 8 2 7 1 6 5 4 3 2 1 0 -1 -1 a b 6 5 4 3 2 1 0 -1 -1 a b 7 1 6 5 4 3 2 1 0 -1 -1 b a 8 2 8 7 1 2 r ( °/s and f ( ° r ( °/s and f ( ° 0 1 2 time (s 3 4 5 0 1 2 time (s 3 4 5 r ( °/s and f ( ° 0 1 2 time (s 3 4 5 1 Yaw rate test
4、result; 2 Yaw rate simulation result a Nominal fore wheel turn angle of test input; b Nominal fore wheel turn angle of simulation input Fig.8. (a six degree of freedom model ; (b seven degree of freedom model ; (c nine degree of freedom model Through the comparisons between simulation curves and tes
5、t curves, it is obvious that simulation results of nine-degree of freedom model of coach greatly approach test results. Overshoot of simulation of nine-degree of freedom model curve is much little and simulation curve appears convergence trend. 4. Simulating analysis of coach handling and stability
6、under operating mode of avoiding obstacle The following dynamics simulations, under running mode of dangerous avoiding obstacle, are carried out by using nine-degree of freedom model of coach which was proved to be valid. Input function of drivers avoiding obstacle operating mode, which is nominal f
7、ore wheel angle of used simulating input, is written as 8 Farong Kou et al. / Energy Procedia 13 (2011 2916 2924 Farong Kou et al. / Energy Procedia 00 (2011 000000 2923 (0 t 0.2 0 0.0691(t 0.2 (0.2 < t 1.20 (1.2 t 3.2 f = 0.0691 0.0691(t 3.2 + 0.0691 (3.2 t 4.2 (t 4.2 0 (31 The dynamics simulati
8、on under running mode of avoiding obstacle is completed at 85km/h speed with different stiffness lateral stabilizer rod being fixed in coach fore axle, the results of which are given in fig.9. 0.5 c1=159030Nm/rad c1=268590Nm/rad c1=378160Nm/rad 7 c1=159030Nm/rad c1=268590Nm/rad c1=378160Nm/rad 0 Lat
9、eral deviation angle of coach center of mass deg 6 5 -0.5 Coach roll angle deg 4 -1 3 -1.5 2 -2 1 -2.5 0 -3 -1 0 1 2 3 Time s 4 5 6 0 1 2 3 Time s 4 5 6 Fig.9. (a response curve of lateral deviation angle of coach; (b response curve of roll angle of coach 5. Conclusions Coach dynamics models of poly
10、-degree of freedom are established based on the analysis of coach structure and load. Passenger body models are built and subsequently verified. The tests of real vehicle are done on the testing road and the effectiveness of established models is validated. Under operating mode of dangerous avoiding
11、 obstacle, coach dynamic simulations are carried out by using nine-degree of freedom model of coach which was proved to be valid. The simulating results show that handling and stability of coach is obviously improved when lateral stabilizer rod is fixed. Stiffness increasing for lateral stabilizer r
12、od, further enhances coach running stability. Lateral deviation angle of coach center of mass drops and the amplitude of coach weaving is reduced. Acknowledgements This work was financially supported by 2010 Chinese post doctor scientific fund(20100481310 , Shaanxi education department scientific research plan-science special (2010JK660, the doctor initial fun
温馨提示
- 1. 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。图纸软件为CAD,CAXA,PROE,UG,SolidWorks等.压缩文件请下载最新的WinRAR软件解压。
- 2. 本站的文档不包含任何第三方提供的附件图纸等,如果需要附件,请联系上传者。文件的所有权益归上传用户所有。
- 3. 本站RAR压缩包中若带图纸,网页内容里面会有图纸预览,若没有图纸预览就没有图纸。
- 4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
- 5. 人人文库网仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对用户上传分享的文档内容本身不做任何修改或编辑,并不能对任何下载内容负责。
- 6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
- 7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。
最新文档
- 煤矿下料口管理办法
- CQI审核管理办法
- 临床质控员管理办法
- 煤矿灾害防治与重大事故处理课件
- 福建省薪酬管理办法
- 中国洗染业管理办法
- 物流分包方管理办法
- 甲方与结算管理办法
- 陕西浮桥管理办法
- j酒店车辆管理办法
- 2023年中国(浦东)知识产权保护中心专利预审员招聘笔试参考题库附带答案详解
- 勘界定标技术报告
- von frey丝K值表完整版
- 危险性较大的分部分项工程施工前安全生产条件核查表
- GB/T 5696-2006预应力混凝土管
- GB/T 528-2009硫化橡胶或热塑性橡胶拉伸应力应变性能的测定
- GB/T 3299-1996日用陶瓷器吸水率测定方法
- 大客户战略管理
- 精轧机组机械设备使用说明书
- 2022年机械制图期末试卷及答案
- 设备维护保养制度-设备维护保养制度规定
评论
0/150
提交评论