《基于MATLAB／Simulink的汽车平顺性的仿真模型》-毕业论文（设计）.doc

摘 要 本文在分析平顺性的研究意义和研究内容的基础上，以数学仿真原理为理论基础，建立了以某经济型轿车为原型的整车八自由度汽车模型拉格朗日方程，并应用仿真软件 MATLAB/Simulink建立了汽车平顺性的仿真模型。按照国家标准模拟了不同车速下的汽车试验，得出了平顺性仿真在不同车速下时间域和频率域的仿真结果。 本文还参考了实车的平顺性试验，该试验参照国标GB／T4970—1996执行。在国家B级路面上以不同车速对驾驶员座椅、副驾驶员座椅和后排左侧座椅的垂直加速度信号进行了测量，得出了平顺性试验在时间域和频率域的结果。在汽车平顺性仿真与试验的基础上，文中对处理后的数据结果进行了比较分析，对试验所用汽车的平顺性作出了评价，给出了仿真与试验的相应结论。 关键词：平顺性，八自由度建模，路谱，MATLAB/Simulink Abstract This paper analyzes the significance of ride comfort and contents of research based on the principle of mathematical simulation based on the theory established by an economy car for the prototype vehicle eight degrees of freedom vehicle model Lagrange equation, and applying simulation software MATLAB / Simulink to establish a simulation model of vehicle ride comfort. Simulated in accordance with national standards of vehicles under different speed test results, the simulation ride at different speeds time domain and frequency domain simulation results. This article also during the actual car test ride, test the light of the implementation of national standard GB/T4970-1996. B-class roads in the country at different speeds on the drivers seat, co-pilot seat and left rear seat of the vertical acceleration signal was measured, obtained test ride in the time domain and frequency domain results. In the car ride simulation and experiment based on the text of the processed data results were compared, the test used in ride comfort has been evaluated, the simulation and testing the corresponding conclusions.  Key words: Comfort,Eight degrees of freedom model, Road spectrum, MATLAB/Simulink 目 录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc263948282 前 言 PAGEREF _Toc263948282 \h 1 HYPERLINK \l _Toc263948283 1绪论 PAGEREF _Toc263948283 \h 2 HYPERLINK \l _Toc263948284 1.1汽车平顺性研究的意义 PAGEREF _Toc263948284 \h 2 HYPERLINK \l _Toc263948285 1.2汽车平顺性研究的主要内容 PAGEREF _Toc263948285 \h 2 HYPERLINK \l _Toc263948286 1.3汽车行驶平顺性研究发展概况 PAGEREF _Toc263948286 \h 4 HYPERLINK \l _Toc263948287 2汽车行驶平顺性的评价 PAGEREF _Toc2