Evaluation and Extraction Characteristic Parameters of Road Profile based on PSD
Duan Huming1,3 Shi Feng2 Ma Ying2 Zhang Kaibin2 Xie Fei2
1. Post-Doctoral Research Center of China Automotive Engineering Research Institue, Chongqing 400039 2. China Automotive Engineering Research Institue, Chongqing 400039 3. College of Automotive Engineering of Tongji University, Shanghai 201804
Abstract：It’s reviewed that the components of measurement system of road surface data and measurement and pre-processing methods of road surface profile in automotive test. Based on the Power Spectrum Density (PSD) analysis of road profile and the demonstration of octave-band filter and regionalism map method in GB/T 7031 – 2005, there are two extracted methods of characteristic parameters which are presented. One is percents of PSD of road profile in regionalism map, the other is parameters of fitting a straight line based on smoothing PSD of road profile. After the introduction of these methods in evaluation and extraction characteristic parameters of road profile, several actual measurement road data as examples, they show that the results of calculation and processing are significant. The test analysis and comparison results show that these extraction characteristic parameters methods of road profile are simple and has obvious effect. These extraction methods can be widely applied to mass road surface data processing and other engineering vibration signals processing.
2013, Vol. 32 
