臺灣博碩士論文加值系統

隨著本國大型重機的數量逐年增長，重機的安全性也逐漸受到重視，但國內對於大型重機在操控與車身穩定上的研究則相對較少，也因此在減震配備的設計與生產上國內大廠仍舊多依賴其經驗而非學術上、理論上的依據。
擺振(wobble)與迂迴擺動(weave)是機車行駛中兩大不穩定現象。本篇研究主要專注於機車幾何設計對擺振的影響，藉由摩托車動態模擬軟體，觀察改變速度、轉向系統質量與前避震後傾角，對擺振振幅與擺振頻率的影響。由結果中可看出在高、中速時轉向系統質量與前避震後傾角的確會對擺振造成明顯的影響，而速度的影響則是在高速行駛時才會出現。
本研究另提出一機車擺振測試平台之設計，以測試機車擺陣特性。利用機構動態模擬軟體設計平台，於軟體中模擬實際車輛之轉向系統，觀察並分析其結果與機車動態模擬軟體結果之差別。

As the number of heavy motorcycle getting more and more each year, the safety of motorcycle has gradually getting people’s attention. But the research about heavy motorcycle stability and handling are relatively few in Taiwan, therefore the manufacturers in Taiwan are still relying on their own experience, designing motorcycle safety equipment and suspension, rather than academic basis theory.
Wobble and weave are the two most common unstable phenomenon during the ride, this research will focus on how the geometric parameters of motorcycle will affect wobble. By using the motorcycle dynamic simulation software we can simulate several possible factors which may affect wobble. Those factors are mass of the steering system, the castor angle of front suspension system and the change of velocity. From the result we can tell that at middle and high speed, castor angle and steering mass will affect the frequency and amplitude of wobble, on the other hand the effect of velocity change will appear at high speed only.
In this thesis also deign a wobble test platform to test the characteristics of wobble phenomenon, using multiple body dynamic simulation software to simulate the motorcycle steering system in real world, trying to observer and analysis the different between the motorcycle dynamic model and the test platform that design in this thesis.

摘 要 i
ABSTRACT ii
誌 謝 iii
目 錄 iv
表目錄 v
圖目錄 vi
第一章 導論 1
1.1 研究動機與目的 1
1.2 文獻回顧 2
1.2.1 機車數學模型發展 3
1.2.2 機車擺振之研究 4
1.3 論文架構 5
第二章 摩托車動態模型介紹 7
2.1 Sharp之機車動態數學模型 7
2.1.1 座標系建置 7
2.1.2動態數學模型 8
2.2 摩托車動態模擬軟體BikeSim 3.1 12
第三章 機車擺振動態之探討 16
3.1 機車幾何設定對擺振之影響 16
3.1.1 速度對擺振的影響 17
3.1.2 轉向系統之質量對擺振之影響 22
3.1.3 前避震後傾角對擺振的影響 32
3.2 擺振關鍵因素分析 42
3.2.1 分析方法 43
3.2.2 結果分析 47
第四章 機車擺振平台之設計 56
4.1 擺振測試平台 56
4.2 擺振測試平台結果分析 58
第五章 結論與未來展望 62
5.1 結論 62
5.2 未來展望 62
參考文獻 63
符號彙編 65

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