不同車速行駛於真實路況下車體避震效應之研究

Study of Vehicle Attenuation Effect on Real Road Condition under Different Motion Speeds

林盛勇(Shen-Yung Lin) ； 張哲綱(Che-Kang Chang)

《中華民國振動與噪音工程學會論文集》 2008 (2008/05) Pp. 435-441

https://doi.org/10.30028/CSSVANNUAL.200805.0435

摘要

本研究係結合振動量測與頻譜訊號分析，進行車輛以不同車速行駛於不同路面時，其車體避震支撐架與輪軸架振動監測與動態響應評估。以福特1.6L自小客車為載具，依不同車速行駛於七種不同路況時，利用PULSE動態訊號分析儀擷取車輛於行駛狀態時車體避震支撐架與輪軸架的振動訊號。線上量測的訊號藉由快速傅立葉轉換(Fast Fourier Transform)的功率頻譜密度(Power Spectrum Density)與反譜(Cepstrum)方法及總量分析(Overall)進行訊號處理及分析。針對在不同車速下所對應避震器振動衰減後的能量與路面波動在車輪軸激發的振動能量進行比對分析，並探討路面與車速參數的改變對車體波動的效應。本研究分析之結果，可提供避震器及車輛製造廠商於避震系統減振效果之設計製造參考。

關鍵字

振動量測 ； 頻譜訊號分析 ； 車輪擺振

並列摘要

Vibration measurement in conjunction with spectrum signal analysis is utilized to monitor the vibration and to assess the dynamic response of a vehicle body absorber system frame and rigid axle when a car travel on real road with different speeds. Ford 1.6L sedan was selected as an object to carry out experiment on seven kind of different real road conditions with different speeds. PULSE dynamic signal analyzer was used to acquire the vibration signal on vehicle body absorber system frame and rigid axle during the vehicle in motion. The on-line signals acquired are then processed Through Fast Fourier Transform with Power Spectrum Density and Cepstrum, and Overall analysis method. The energy of an absorber vibration attenuation to that of excitation vibration energy on rigid axle corresponding to different motion speeds is analyzed and compared. The influence of the changes of road condition and motion speed on vehicle body oscillation is also investigated in this study. The investigation results may be extensively as a reference to absorber system design and manufacturing for vehicle manufacturing company.

並列關鍵字

vibration measurement ； spectrum signal analysis ； wheel shimmy