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研究生:郭仲軒
研究生(外文):Chung-Hsuan Kuo
論文名稱:後輪操控對抑止車輛翻覆之影響分析
論文名稱(外文):Effect of the rear wheel handling for vehicle rollover prevention
指導教授:劉霆劉霆引用關係
學位類別:碩士
校院名稱:國立臺灣大學
系所名稱:機械工程學研究所
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2007
畢業學年度:95
語文別:中文
論文頁數:118
中文關鍵詞:車輛翻覆外側後輪 轉向煞車力九自由度全車動態模型
外文關鍵詞:rolloveroutside rear wheelsteerbraking force9-DOF vehicle model
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  • 被引用被引用:2
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本研究欲瞭解後輪操控與車輛動態特性變化之間的關係,並探討操控後輪對車輛翻覆之影響。首先建立九自由度全車動態數學模型,利用基礎力學理論推導系統之運動方程式,以電腦輔助模擬分析,觀察車輛動態翻覆特性。本研究以NHTSA規定之J-turn進行模擬,並定義兩輪離地即判定為車輛翻覆,觀察在不同前輪轉向角、車速設定之內側前後輪離地時間差。最後對即將翻覆之車輛,進行外側後輪轉向、施加縱向力、轉向及施加縱向力等操控模式,觀察對車輛翻覆行為之影響。研究中得到不同外側後輪操控模式對改變車輛動態特性之影響,以及如何操控外側後輪以延遲或抑止車輛翻覆。
The purpose of the study is to understand the fundamental relationship between the rear wheel handling and vehicle dynamic characteristics. Firstly, a 9-DOF vehicle model is introduced, and by using the basic dynamic principle and computer programs, the equations of motion of the system are established and used to observe the vehicle dynamic characteristics. The study defines rollover happens when two wheels lift-off occur. Then, in different velocities and steering angles of front wheels, simulate with J-turn test defined by NHTSA and observe the difference of the time between two inside wheels. Finally, observe the effect of the outside rear handling for the rollover behavior of the vehicle which will overturn soon by exerting steering, longitudinal force, and steering plus longitudinal force on the outside rear wheel. This study obtains the fundamental relationship between the rear wheel handling and vehicle dynamic characteristics and the way how to handle the outside rear wheel in order to postpone or prevent rollover.
口試委員會審定書 i
致謝 i
中文摘要 ii
英文摘要 iii
圖目錄 vii
表目錄 xii
符號彙編 xiii
第一章 緒論 1
1-1 前言 1
1-2 文獻回顧 2
1-3 研究動機與目的 4
1-4 研究方法與步驟 5
第二章 理論基礎 6
2-1 輪胎模型 6
2-1-1 輪胎座標系統定義 6
2-1-2 輪胎所受的力與力矩 7
2-1-3 輪胎側向力計算 8
2-2 阿克曼轉向幾何 12
2-3 側傾中心與側傾軸 13
2-4 三自由度車輛數學模型 16
第三章 車輛動態數學模型 22
3-1 車輛動態非線性數學模型 23
3-2 運動方程式 25
第四章 車輛翻覆之數值模擬與分析 40
4-1 J-turn模擬與車輛翻覆 40
4-2 數值分析方法 42
4-3 電腦輔助分析 45
4-3-1 懸吊系統參數轉換 45
4-3-2 ADAMS車輛模型比較 49
4-4 模擬狀態設定 58
4-5 J-turn模擬結果 63
第五章 後輪操控對車輛動態翻覆特性之影響 66
5-1 後輪轉向之影響 67
5-1-1 步階後輪轉向 68
5-1-2 零側向力 82
5-1-3 小結 84
5-2 後輪縱向力之影響 84
5-3 後輪轉向及縱向力之影響 94
5-3-1 後輪轉向及施加驅動力 94
5-3-2 後輪轉向及施加煞車 102
5-3-3 小結 109
5-4 討論與小結 109
第六章 結論與建議 111
6-1 結論 111
6-2 未來展望 113
參考文獻 114
附錄A 119
附錄B 127
作者簡歷 129
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