車輛乘適性能分析與驗證

On the Analysis and Verification of Ride Comfort

廖家慶(Chai-Ching Liao)

指導教授 ： 傅增棣

國立臺灣大學/工學院/機械工程學研究所/碩士(2005年)

https://doi.org/10.6342/NTU.2005.02739

摘要

本研究嘗試運用隨機振動理論，以四分之一車輛分析模型進行車輛的乘適性能預測，再分別探討分析結果與客觀量測、主觀評估之相關程度，以驗證乘適性能分析流程的實用性。研究結果顯示，分析模型在加速度頻譜密度函數的預測表現並不理想，但是對於均方值的變化趨勢在高速時則有良好的預測能力；而在乘適性能分析方面，原況加速度指標與ISO加權指標對於主觀評估結果具有良好的預測效果。此外，在本研究中也發現，於分析模型中使用非線性懸吊阻尼，將能有效改善對客觀量測結果的預測能力。

關鍵字

車輛乘適性 ； 隨機振動 ； 相關性分析

並列摘要

Based on the theory of random vibration, a quarter car model is used in this research for the prediction of ride comfort for passenger cars. Authenticity of analytical results is then examined by correlation analyses with direct measurements and human evaluation on a test track, respectively. The approach indicates that good correlation exists between simulation results and RMS values from the measurements at high speeds. However, analytical results are not correlated well with power spectral density functions, which can be improved by using nonlinear suspension damping model in the approach. On the other hand, the original acceleration and ISO weighted acceleration indices developed in this project are found both capable of predicting the proper trend of human subjective evaluation.

並列關鍵字

ride comfort ； random vibration ； correlation analysis

參考文獻

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[17] Kim, T., Cho, Y., Yoon Y. -S. and Park S., “Dynamic Ride Quality Investigation and DB of Ride Values for Passenger and RV Cars”, SAE Paper 2001-01-0384, 2001.

[18] Newland, D.E., An Introduction to Random Vibrations and Spectral analysis, Longman, London, 1975.