Analysis and Verification of the Pitch Model for Ride Comfort
Date Issued
2007
Date
2007
Author(s)
Chu, Ting-Hui
DOI
zh-TW
Abstract
Based on the theory of random vibration, a half-car pitch model is used in this research for the prediction of ride comfort for passenger cars. In order to validate its authenticity, correlation analyses are performed between this model with measurements and subjective evaluation on a test vehicle. The results indicate that excellent correlation exists between simulations of the pitch model (also the simple quarter-car model) and RMS trends from the measurements under different speeds. In cases of different vehicle parameters, the correlation is good at high speeds, and results of the pitch model are slightly better than these of the quarter-car model. For the evaluation of ride comfort, the ISO weighted acceleration index proposed in this research is capable of predicting the trend of subjective evaluation and its correlation is even better than that of measurements. Moreover, the pitch model has better capability in predicting vehicle ride comfort than the quarter-car model. It can also prevent the needs of large amount of input parameters required by the full-car model and the potential error which might incur.
Subjects
乘適性能
俯仰模型
隨機振動
均方根值
相關性分析
ride comfort
pitch model
random vibration
root mean square
correlation analysis
Type
thesis
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