減震器於車輛舒適性之影響分析

Effect of Vibration Absorber on Vehicle Ride Comfort

吳宜諺(Yi-Yen Wu)

指導教授 ： 尤正吉

國立臺北科技大學/機電學院/車輛工程系所/碩士(2011年)

https://doi.org/10.6841/NTUT.2011.00445

摘要

舒適性在車輛設計為一重要議題，主要取決於懸吊的設計優良與否。近幾年來環保意識的抬頭，使得輪轂馬達電動車逐漸受到重視，而輪轂馬達車的設計，係將動力源馬達直接裝於輪胎上，此舉雖可增加動力傳輸之效率，卻因為簧下質量過重而造成舒適性不佳；為改善此負面效應，本研究利用在懸吊中加裝減震質量之概念來吸收輪胎之振動。減震器可以是外加之質量塊，亦可為輪轂馬達本身，此外，減震器亦可運用於傳統懸吊內以改善車輛之舒適性。本文建構四分之一車包含車身、輪胎與減震質量之三自由度數學模型，利用最佳化減震理論分析減震器抑制車身振動之效果，在設計之驗證上除了車輛頻域響應指標外，並以隨機路面輸入來評估人體加權均方根加速度來判斷優劣。本論文之分析結果應對未來減震器於車輛懸吊之應用與實現有效給予建議。

關鍵字

減震器 ； 懸吊 ； 舒適性

並列摘要

Riding comfort, an important issue in vehicle design, depends on performance of suspension is excellent or not. Wheel-hub motor vehicles have gradually been noticed because of the rise of environmental consciousness in recent years. Wheel-hub motor vehicle is the vehicle that installs the energy source-motor in the wheel. Even though this design can increase the power transmission efficiency, it makes riding comfort poorer because the unsprung mass is overweight. For improving this negative effect, this research used the vibration absorber to absorb the wheel vibration. Vibration absorbers can be an extra mass or be wheel-hub motor itself, besides, absorbers can also be used in traditional suspension to improve the riding comfort of vehicles. This thesis constructs a 3 d.o.f. quarter car math model which includes car body, wheel and vibration absorber to analyze the restrain effect of body vibration by using vibration optimization theory, and evaluate the effect of random road input on vehicle frequency response index and human body weighted acceleration R.M.S value. The conclusion of this thesis can give suggestions for application of vibration absorber on vehicle suspension in the future.

並列關鍵字

Absorber ； Suspension ； Ride Comfort

參考文獻

[14] 梁誌明，輪內馬達懸吊系統之分析與設計，碩士論文，台灣大學，2010

[5] R. N. Jazar, "Vehicle Dynamics Theory and Application, " Springer , pp. 804~812, 2008

[6] H. Ghoneim and S. M. Metwallli, "Optimum Vehicle Suspension With a Dymped Absorber, " ASME, Vol. 106 ,pp. 148~155, 1984

[7] Go Nagaya, Yasumuchi Wakao and Akihiko Abe, "Development of an in Wheel drive with advanced dynamic-damper mechanism, " JSAE Review, 24(2003) 477-481

[13] J.Y. Wong, Theory of Ground Vehicle, John Wiley & Sons, Inc, 2008