【正文】 ceoriented bar articulated point. The location and orientation of the suspension arm length can produce suitable motions. This thesis first analyzes the consists and function of the doublewishbone suspension in the design, then checks the up and down of arms of the doublewishbone independent suspension, Thirdly, make a detailed consideration of the various ponents of the link between relations is made. I calculate the suspension on the basis of the natural vibration frequency, static suspension deflection and dynamic deflection and elastic characteristics of the suspension terms at last. On the basis of Analysis of the position and role of the size of the ponents in the doublewishbone independent suspension, with CAD software and Pro / E, respectively, 2D drawings and 3D product Modeling are made. We made an accurate and detailed structural analysis on the design, which provides the reference for optimal design of the doublewishbone suspension. The approach can improve the performance of the doublewishbone independent suspension.Keyword: doublewishbone suspension。 motor vehicle。 Design。 Modeling目 錄1 前言1 課題研究的目的和意義122 懸架4 懸架的功用和組成4 懸架系統(tǒng)的自然振動頻率4 汽車懸架的類型5 雙橫臂獨立懸架63．懸架主要參數的確定8 懸架靜撓度 8 懸架的動撓度 9 懸架彈性特性9 后懸架螺旋彈簧剛度及應力計算94 獨立懸架導向機構設計及強度校核13 設計要求13 導向機構的布置參數13 雙橫臂式獨立懸架導向機構設計165 減振器機構類型及主要參數的選擇計算20 分類20 相對阻尼系數 20 減振器阻尼系數 的確定21 最大卸荷力 的確定22 簡式減振器工作缸直徑D的確定226 Pro/E三維建模24 關于Pro/E24 應用現狀27 本章小結277 結論28參考文獻29致 謝30附 錄31汽車畢業(yè)論文：汽車空氣懸架試驗系統(tǒng)方案設計論文共32頁，18515字，任務書一份，文獻綜述一份，autocad圖紙6張摘要本論文根據有關汽車模型簡化的理論，在現有的四分之一模擬懸架機械裝置的基礎上，用空氣彈簧代替普通螺旋彈簧設計空氣懸架試驗臺系統(tǒng)。本試驗臺實現的是懸架的剛度可調。設計一個副氣室，通過一個步進電機控制主、副氣室間通路的大小來實現空氣彈簧剛度的調節(jié)。本試驗臺由空氣壓縮機、濾清器、安全閥、空氣彈簧、減振器和其它的相關部件組成機械振動系統(tǒng)，由傳感器、ECU和執(zhí)行元件組成測控系統(tǒng)，利用傳感器采集信號，通過計算機處理，控制高度閥和步進電機，從而使簧上質量的高度和振動頻率都在一定的范圍之內。本論文首先進行了彈簧的選用并計算以及減振器、傳感器、氣動元件和步進電機的選用，然后是設計臺架總體結構，布置信號采集裝置以及校核重要零件，最后是畫出總成的裝配圖、重要零件的零件圖。關鍵詞：汽車振動，空氣彈簧，可控空氣懸架，懸架試驗臺AbstractThe thesis according to the theory which simplifies about the model of vehicle, on the base of a quarter car simulation suspension mechanism rig, the ordinary helical spring is replaced by an air spring, and the air suspension testing rig have been designed.The test rig put the suspension rigidity adjustment into practice. Designs an accessory airspace, controls the pipeline size between the main and the accessory airspace with the stepper motor and realizes the air spring variable stiffness. The mechanical vibrating system of the test rig is posed of the air pressor、the filter、the safety valve、the air spring、the shock absorber and other related parts, the measure and control system is posed of the sensor、ECU and the performance element. Using the sensor gathers signal, then the ECU analyses and controls the height valve and the stepper motor to make the height and the vibration frequency of the objects on the air spring in certain scope. The thesis has first carried on spring selection and calculates as well as the shock absorber, the sensor, the air operated part and the stepper motor selection, then designs the test rig structure, arranges signal gathering equipment and examine the important ponents, finally draws the assembly drawing and the detail drawings of the important parts.Key Words: Automobile vibration, Air spring, Controllable air suspension, The suspension test rig 目錄前言1第一章 緒論22內容和意義4第二章 汽車振動的簡化及分析556第三章 空氣懸架系統(tǒng)元件概述9910121415第四章 控制方式18181819第五章 信號采集、控制元件的選擇控制方案設計20高度調節(jié)22第六章 機械元件的設計、校核232323242校核25 減振器螺栓的校核26 立柱的設計26 簧上、簧下質量的確定272728結 論29致 謝30參考文獻31附 錄16 / 1