臺灣博碩士論文加值系統

本研究係關於一種新型車輛可變齒輪比轉向系統之研發，其主要用途在於連結方向盤與前輪轉向機構，使車輛在轉向時，可針對不同之車速與方向盤轉角，協調其前輪所需轉動的角度，讓車輛於等速行駛時能保有相同之意欲偏駛率增益(Desired Yaw rate gain)，並隨著車速的增減而調整意欲偏駛率增益之大小，使車輛擁有更佳的靈活性、操縱性與穩定性等，其中意欲偏駛增益係定義為偏駛率(Yaw rate)相對於方向盤轉角之比值。
對於新型車輛可變齒輪比轉向系統之研發，本研究主要以運動學的角度分析車輛之轉向行為，並根據兩項本研究所欲達到之目的：一、等速行駛時意欲偏駛率增益保持為一常數；二、隨車速增減而意欲偏駛率增益之值應做適當的調整；及參考實際車輛之相關尺寸與轉向特性，以推導車輛轉向時前輪轉角與方向盤轉角之相對應關係，進而研發出一新型機構以符合上述之特性。

This thesis deals with the research and development of a new variable-gear-ratio steering system (VGS). The main purposes of the variable-gear-ratio steering system are to connect the steering wheel and the front-wheel steering mechanism and to coordinate the turning angle of the front wheels, according to the steering-wheel angle and the speed of the vehicle, in order to maintain a constant “desired yaw rate gain” at a constant speed of vehicle. However, the value of the desired yaw rate gain should be varied at different vehicle speed to give better maneuverability, stability, and mobility. The definition of the above-mentioned “desired yaw rate gain” is the ration between the yaw rate and the steering wheel angle.
This research collects all kinds of vehicle variable-gear-ratio (VGS) steering systems from academic journals and patent publications to conduct a thorough classification and kinematic analysis.
This research mainly studies the vehicle steering behaviors from the viewpoint of kinematics to develop a new variable-gear-ratio steering system with more ideal performances. This research wants to achieve two goals: first, keep the desired yaw rate gain constant at a constant speed; second, vary the value of the desired yaw rate gain when the vehicle speed is changed. According to the dimensions of the production vehicles and the ideal vehicle cornering properties, this research derived the ideal relationship between the front wheels and the steering wheel when cornering and accomplished the mechanism design of the new variable-gear-ratio steering system. Finally, Pro/ENGINEER software was employed to construct the solid models of the new design and to conduct dynamic simulations and interference check, in order to verify the performance of the new design.

中文摘要…………………………………………………………………iii
英文摘要…………………………………………………………………iv
誌謝………………………………………………………………………v
目次………………………………………………………………………vi
表目錄……………………………………………………………………ix
圖目錄……………………………………………………………………x
第一章 簡介……………………………………………………………1
1.1 可變齒輪比轉向系統之簡介………………………………………1
1.2 可變齒輪比轉向系統之起源與沿革………………………………4
1.3 本論文之研究方向…………………………………………………5
第二章 可變齒輪比轉向系統之文獻回顧與分析……………………7
2.1 可變齒輪比轉向系統之分類………………………………………7
2.2 機械式可變齒輪比轉向系統之文獻回顧與分類…………………8
2.2.1 固定式……………………………………………………………9
一、 變齒距式…………………………………………………………10
二、 圓柱凸輪式………………………………………………………10
三、 偏心齒輪式………………………………………………………11
2.2.2 可調式……………………………………………………………12
一、 滑塊連桿式………………………………………………………12
二、 鐘擺式……...……………………….…………………………...14
三、 行星齒輪式..……………………….…….……………………...15
四、 側傾圓環式..……………………….….………………………...17
2.3將現有可變齒輪比轉向系統依年代沿革分類……………………………..18
2.4將現有可變齒輪比轉向系統依製造商分類……………………………..19
2.5 可調式核心機構之運動分析………………………………………………..20
2.5.1 滑塊連桿式核心機構之簡易運動分析……………………………...20
2.5.2 鐘擺式核心機構之簡易運動分析…………………………………...22
2.5.3 側傾圓環式核心機構之簡易運動分析……………………………...24
2.6 現有可變齒輪比轉向機構之評比……………………………………..27
2.6.1 固定式與可調式之比較……………………………………………...27
2.6.2 可調式核心機構之比較……………………………………………...28
第三章 新型可變齒輪比轉向系統之研發……………..…………………………….30
3.1 車輛轉向運動之分析………………………………………………………..30
3.1.1轉向基本原理之簡介………………………..………………………...30
3.1.2理想人車界面應具備之條件.……………....………………………...44
3.2 新型可變齒輪比轉向系統之設計流程與運動分析………………………..48
3.2.1評估現有核心機構之改良潛力並進行改良…………………..……...48
3.2.2新型核心機構之運動分析…………………..………………………...55
3.2.3新型核心機構之相關參數分析與設定………………..……………...64
3.3 兩型新設機計之評比….…..………………………………………………..73
第四章 新型可變齒輪比轉向系統之運動模擬與作動分析…………………….82
4.1新型可變齒輪比轉向機構於Pro/ENGINEER 2001之組立（ASSEMBLY）設定與Pro/MECHANISM之設定……………………….……………..…...82
4.2新型可變齒輪比轉向機構於Pro/ENGINEER 2001 之運動（Motion）模擬……………………………………..……………………………..………..91
4.3 新型可變齒輪比轉向機構之干涉檢查與尺寸調整………..…..…..……96
第五章 結論與建議………………………………………………………………...97
5.1 結論……………………………………………………………..……..……97
5.2 建議與未來展望……………………………………………………………98
5.2.1新型可變齒輪比轉向系統………………..………………….……….98
5.2.2車輛四輪轉向系統……………………..………….………….……….98
5.3 心得………………………………………………………………..………99
參考文獻……………………………………………………………………………...100
作者簡介…………………………………………………………………………103

1. Shimizu, Y.; Kawai, T.; Yuzuriha, J.,“Improvement in Driver-Vehicle System Performance by Varying Steering Gain with Vehicle Speed and Steering Angle VGS (Variable Gear-Ratio Steering System),” SAE 1999-01-0395, 1999.
2. Millsap, S. A.,“Handling Enhancement Due to an Automotive Variable Ratio Electric Power Steering System Using Model Reference Robust Tracking Control,” SAE 960931, 1996.
3. Reimpell, J.; Stoll, H.,“The Automotive Chassis: Engineering principles,” ARNOlD ISBN 0-340-61443-9, 1986 , pp.196-201.
4. Tokunaga, H.; Shimizu, Y., “Variable Gear Ratio Steering System,” U.S. Patent 6,155,377, 2000.
5. Bishop, A.E., “Rack and Pinion Variable Ratio Steering Gear,” U.S. Patent Re.28,740, 1976.
6. Shimizu, Y.; Kawai, T.; Tajima, S., “Variable Ratio Steering System,” U.S. Patent 5,489,004, 1996.
7. Higuchi, M., “Variable Ratio Rack and Pinion Steering Gear,” U.S. Patent 4,475,413, 1984.
8. Yanai, T., “Variable Ratio Rack and Pinion Steering Gear,” U.S. Patent 4,444,070, 1984.
9. Adams, F.J.; Downing, P.A., “Variable Ratio Rack and Pinion Gear,” U.S. Patent 4,322986, 1982.
10. Adams, F.J., “Rotatable Sleeve Rack,” U.S. Patent 4,270,397, 1981.
11. Adams, F. J., “Steering Gear and Method of Assembling Such Gear,” U.S. Patent 4,282,770, 1981.
12. Adams, F. J., “Pinion for Variable Ratio Rack And Pinion Steering Gear,” U.S. Patent 3,983,763, 1976.
13. Ueno, K.; Suganuma, T.; Masuda, H., “Fast Reaction Steering Mechanism,” U.S. Patent 5,203,421, 1993.
14. MacDuff, S.I., “Variable Ratio Rack and Pinion Power Steering Gear,” U.S. Patent 3,908,479, 1975.
15. Tokunaga, H.; Shimizu, Y., “Variable Gear Ratio Steering System,” U.S. Patent 6,155,377, 2000.
16. Shimizu, T., “Steering Angle Ratio Varying Device for a Vehicle,”, U.S. Patent 5,386,879, 1995.
17. Kato, K.; Takeuchi, S.; Natsume, M.; Kawakami, S.; Kushiro, I.; Niwa, S., “Steering Apparatus,” U.S. Patent 5,303,793 , 1994.
18. Shimizu, Y.; Kawai, T.; Yuzuriha, J., “Steering Apparatus with Variable Steering Angle Ratio,” U.S. Patent 5,284,219, 1994.
19. Shimizu, Y., “Steering Apparatus with Variable Steering Angle Ratio for Pitman Arm Steering Mechanism,” U.S. Patent 5,267,625, 1993.
20. Shimizu, Y., Junji, Y. , “Variable Ratio Steering System,” U.S. Patent 5,174,407, 1992.
21. Muller, M.; Reichelt, W.; Frank, P.; Eckstein, L.; Bohringer, M., “Steering Angle Adjusting Device for a Motor Vehicle,” U.S. Patent 5,964,814, 1999.
22. Kanazawa, H., “Steering System for Vehicle,” U.S. Patent 4658,927, 1987.
23. Sauvageot, J.C., “Steering Mechanism with Variable Gear Reduction Controlled by the Speed of the Vehicle,” U.S. Patent 4,932,492, 1990.
24. Akita, T.; Satoh, K.; Kurimoto, M.; Yoshida, T.,” Development of the Active Front Steering Control System,” FISITA paper F2000G341, 2000.
25. Shimizu, Y., “Steering Apparatus with Variable Steering Angle Ratio,” U.S. Patent 5,423,391, 1995.
26. Shimizu, Y., “Variable Ratio Steering System,” U.S. Patent 5,482,130, 1996.
27. Bohner, H.; Moser, M., “Steering Apparatus for a Motor Vehicle,” U.S. Patent 5,896,942, 1999.
28. Gillespie, T. D.,“Fundamentals of Vehicle Dynamics,” Society of Automotive Engineers, Inc., 1994.
29. Winkler, B. C.,“Simplified Analysis of the Steady-State Turning of Complex Vehicles,” Vehicle System Dynamics 29, 1998, pp141-181.
30. Garrott, W. R.; Heydinger, G. J.,“An Investigation, Via Smulation, of Vehicle Characteristics that Contribute to Steering Maneuver Induced Rollover,” SAE paper 920583, 1992.
31. Heathershaw, A.,“Optimizing Variable Ratio Steering for Improved On-Centre Sensitivity and Cornering Control,” SAE paper 2000-01-0821, 2000.
32. Abe, M.; Shibahata, Y.; Shimizu, Y.,“Analysis on Steering Gain and Vehicle Handling Performance with Variable Gear-ratio Steering System(VGS),” FISITA paper F2000G349, 2000.
33. Lee, A. Y.; Lee, A. T.; Le, N. T.,“Variable Dynamic Testbed Vehicle：Dynamics Analysis,” SAE paper 97056, 1997.
34. Higuchi, A.; Saitoh, Y.,“Optimal Control of Four Wheel Steering Vehicle,”Vehicle System Dynamics, 22, 1993, pp397-410.
35. Tajima, J.; Yuhara, N.; Takimoto, S.; Kawai, T.; Shimizu, Y.,“Research on Effect of Steering Characteristics on Control Permance of Driver-Vehicle System from a Viewpoint of Steer-by-Wire System Design,”AVEC ’98, 9837238, 1998.