# 臺灣博碩士論文加值系統

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 本研究欲瞭解全車阻尼係數的調配與車輛動態特性變化之間的關係，並探討在不同車輛參數數值時，調配全車阻尼係數的方法。首先建立七自由度全車模型，利用D’Alembert法建立系統之運動方程式，並且介紹頻域響應、隨機路面振動響應、凸起路面時域響應的理論推導以及模擬方法和結果。接著用上述三種分析方法探討阻尼對於車輛動態特性的影響，並且利用隨機路面振動響應進行阻尼係數的調配與車輛動態特性變化之間關係之探討。最後，改變車輛不同參數的數值，探討調配阻尼係數的方法。研究中得到調配阻尼係數的評估比較方法以及對於車輛動態特性改善之效果，並且針對車輛參數數值改變時調配阻尼係數的方法。
 The purpose of the study is to understand the fundamental relationshipbetween the adjustment of damping coefficients and the vehicle ride andhandling dynamic characteristics. Firstly, a 7-DOF vehicle model isintroduced, and using D’Alembert principle the equations of motion of thesystem are established. Then, the theory of frequency response, randomvibration response, bumper response of the system are introduced. Thethree different motion responses are used to investigate the effect of damperon vehicle dynamics, and the random vibration response is selected tostudy the adjustment of damping coefficients on vehicle ride and handlingdynamic characteristics. Lastly, the numerical results of adjustment ofdamping coefficients with different vehicle parameter are studied in orderto understand the effects of adjustment of damping coefficients. This studyobtains the fundamental relationship between the adjustment of dampingcoefficients and the vehicle ride and handling dynamic characteristics, andthe tendency in adjustment of damping coefficient with different vehicleparameters.
 口試委員會審定書.......................................................................... i誌 謝............................................................................................ ii中文摘要........................................................................................ iii英文摘要.........................................................................................iv圖目錄......................................................................................... viii表目錄............................................................................................xi符號說明....................................................................................... xii第一章 緒論....................................................................................11-1 引言..................................................................................11-2 研究動機與目的...............................................................31-3 研究方法與步驟...............................................................4第二章 理論基礎............................................................................52-1 七自由度全車系統之模型................................................62-2 七自由度全車系統之運動方程式....................................82-3 系統之頻域方程式.........................................................13第三章 路況輸入..........................................................................173-1 隨機路面輸入下系統之振動響應..................................183-1-1 隨機路面的頻域模擬..................................................183-1-2 隨機路面車輛系統的振動輸出..................................223-2 凸起路面的模擬.............................................................30第四章 阻尼係數的調配對車輛動態特性之影響.......................334-1 阻尼的影響......................................................................344-1-1 頻域響應.....................................................................354-1-2 隨機路面.....................................................................374-1-3 凸起路面.....................................................................384-1-4 小結.............................................................................404-2 前後阻尼係數之調配.....................................................404-2-1 近似三自由度系統......................................................414-2-2 七自由度系統..............................................................474-2-3 小結.............................................................................614-3 左右阻尼係數之調配.....................................................624-4 單輪阻尼係數之調配.....................................................674-5 七段可調式阻尼器.........................................................71第五章 車輛參數變化..................................................................775-1 彈性係數的計算.............................................................785-2 車輛重心的改變.............................................................805-2-1 車輛重心的移動..........................................................805-2-2 車輛載重的影響..........................................................825-3 簧下質量的變化.............................................................84第六章 結論..................................................................................876-1 結論................................................................................876-2 未來研究方向.................................................................90參考文獻........................................................................................91附錄A 程式碼及使用說明...........................................................93
 [1] Wong, J. Y., Theory of Ground Vehicle, 3rd ed, New York, JohnWiley & Sons, 2001.[2] Dahlberg, T., "Ride comfort and road holding of a 2-dof vehicletravelling on a randomly profiled road," Journal of Sound andVibration, vol. 58, no. 2, pp. 179-187, 1978.[3] Kushiro, I., E. Yasuda, et al., "An analysis of pitch and bouncemotion, requiring high performance of ride comfort," VehicleSystem Dynamics Supplement, vol. 41, pp. 83-92, 2004.[4] Tamboli, J. A. and S. G. Joshi, "Optimum design of a passivesuspension system of a vehicle subjected to actual random roadexcitations," Journal of Sound and Vibration, vol. 219, no. 2, pp.193-205, 1999.[5] Bae, J. Y., S. H. Hwang, et al., "Development ofsemi-independent type continuously variable damper system byperformance evaluation of full vehicle test," International Journalof Vehicle Design, vol. 31, no. 3, pp. 269-288, 2003.[6] YI, K. and B. S. SONG, "Observer design for semi-activesuspension control," Vehicle System Dynamics, vol. 32, pp.129-148, 1999.[7] 侯 傑、林晏暉等，『台大機械系太陽能車懸吊系統之設計與發展』，中華民國第十屆車輛工程學術研討會，中華民國九十四年。[8] 廖家慶，『車輛乘適性能分析與驗證』，國立臺灣大學機械工程研究所碩士論文，中華民國九十四年。92[9] Jung, Y. H., J. W. Choi, et al., "Overlapping decentralized EAcontrol design for an active suspension system of a full carmodel," Mechanical Engineering and Research Institute, Pusan,Mechanical Technology, pp. 85-90, 2000.[10] Zhang, Y., L. Zhao, et al., "Study on control of vehicle attitudeand ride comfort based on full-car model," Proceeding of the 5thWorld Congress on Intelligent Control and Automation,Hangzhou, P. R. China, IEEE, 2004.[11] Park, J. H. and Y. S. Kim, "Decentralized variable structurecontrol for active suspensions based on a full-car model,"International Conference on Control Applications, Trieste, Italy,IEEE, 1998.[12] 彭新勝，『車輛底盤懸吊與傳動軸整體構件最佳化之振動分析』，國立中央大學機械工程研究所碩士論文，中華民國八十九年。[13] 楊智麟，『簧下質量對車輛懸吊動態性能影響之分析』，國立台灣大學機械工程研究所碩士論文，中華民國九十五年。[14] Cucuz, S., "Evaluation of ride comfort," International Journal ofVehicle Design, vol. 15(Nos 3/4/5), pp. 318-325, 1994.[15] Park, S.-J., W.-S. Cheung, et al., "Dynamic ride qualityinvestigation for passenger car," Detroit, MI, USA, SAE, 1998.[16] Newland, D. E., An introduction to Random vibrations andspectral analysis, New York, Longman Inc, 1984.[17] http://www.kaifa.com.tw/kaifa/index.html
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 1 車輛乘適性能分析與驗證 2 自走車穩定性分析與控制器設計 3 貨車在不同載重時之阻尼調配

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