Please wait a minute...
ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2006, Vol. 7 Issue (Supplement 2): 287-292    DOI: 10.1631/jzus.2006.AS0287
Original Paper     
Fractal modelling of off-road terrain oriented to vehicle virtual test
Wang Qian-Ting, Guo Jian, Chen Yi-Zhi
School of Mechanical and Energy Engineering, Zhejiang University, Hangzhou 310027, China; Department of Civil Engineering, Zhejiang University, Hangzhou 310027, China; College of Statistics & Computing Science, Zhejiang Gongshang University, Hangzhou 310035, China
Download:     PDF (0 KB)     
Export: BibTeX | EndNote (RIS)      

Abstract  In order to reconstruct typical off-road terrain surface for vehicle performance virtual test, a terrain generation method with controllable roughness was proposed based on fractal dimension. Transverse profile sampling and unevenness characteristics of typical off-road terrain were discussed according to the choices of appropriate wavelength and sampling interval. Since the off-road terrain in virtual environment is self-similar, the method of calculating the discrete fractal Gauss noise and its auto-correlation function were analyzed. The terrain surface fractal dimension was estimated by determining the Hurst coefficient. As typical off-road terrain is rugged terrain, the method of reconstructing it using fractal modelling is presented. The steps include calculating statistical variations in the absolute value of the difference in elevation between two points, plotting the points in log-log space, identifying linear segments and estimating fractal dimension from the linear segments slope. The constructed surface includes information on potholes, bumps, trend and unevenness of terrain, and can be used as the excitation of vehicle performance virtual test.

Key words： Off-road terrain      Transverse profile of terrain      Terrain surface reconstruction      Fractal dimension     
Received: 03 March 2006     
CLC:  U467.3  
Service
E-mail this article
Add to my bookshelf
Add to citation manager
E-mail Alert
RSS
Articles by authors
Wang Qian-Ting
Guo Jian
Chen Yi-Zhi
Cite this article:

Wang Qian-Ting, Guo Jian, Chen Yi-Zhi. Fractal modelling of off-road terrain oriented to vehicle virtual test. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2006, 7(Supplement 2): 287-292.

URL:

http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.2006.AS0287     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2006/V7/ISupplement 2/287

[1] GU Hong-ying, ZHUANG Yue-ting, PAN Yun-he. An iris recognition method based on multi-orientation features and Non-symmetrical SVM[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2005, 6( 5): 12-.
[2] YAO Min, YI Wen-sheng, SHEN Bin, DAI Hong-hua. An image retrieval system based on fractal dimension[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2003, 4(4): 421-425.