Wavelet Analysis on Nonstationary Random Road Irregularities

Abstract:

By using time domain modeling obtained from PSD for stationary random road irregularities, concerning about non-uniform moving-vehicle conditions and non-stationary road characteristics, via model assembly and integration to generate non-stationary random road time domain modeling for inputting road excitation. On the assembly of the non-stationary random road time domain modeling, Time-Frequency was analyzed via wavelet analysis. From road data decomposed by the way of Wavelet, both time domain characteristics of signal components in different bands can be obtained and anomaly contained within the signal can also have accurately time-frequency localization. The signal separation can help achieving non-stationary sub-band analysis, and can further study the affection of road signal in different band focus on vibration response of the vehicle, and also providing a strong theoretical basis for road design, quality inspection and grading.

• Periodical: Advanced Materials Research (Volume 346)
• Pages: 689-695
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.346.689
• Online since: September 2011
• Authors: Zhi Gang Hu, Li Ping Chen, Yong Lin Zhang, Shao Yun Song, Wei Feng Guo
• Keywords: Non-Stationary Random Process, Road Irregularities, Time Domain Modeling, Time-Frequency Characteristics, Wavelet Analysis

References

[1] Zhang Yonglin, Teng Honghua, Hou Chuanliang. The research & design of time domain simulation system for vehicle road stochastic irregularity [J]. Trans of the CSAE, 2005, 21(2): 86-91.

[2] Zhang yonglin, Zhang Jiafan. Numerical simulatio of stochastic road process using white niose filtration [J]. Mechanical Systems & Signal Processing, 2006, 20(2): 363-372.

DOI: 10.1016/j.ymssp.2005.01.009

[3] Zhang Yonglin, Yi Qiwei, Ding Shiyun, et al. Research on time series modeling method of 2D stochastic road [J]. Journal of Wuhan University of Technology, 2007, 29(8): 92-95(in Chinese).

[4] Zhang Yonglin, Hu Zhigang, Chen Liping. A new approach to numerical simulation of the vehicle road process with temporal-spatial correlation [J]. Transaction of the Chinese Society for Agricultural Machinery, 2005, 36(9): 13-15 (in Chinese).

[5] Zhang Lijun, Zhnag Tianxia. Study on general model of random inputs of the vehicle with four wheels correlated in time domain[J]. Transaction of the Chinese Society for Agricultural Machinery, 2005, 36(12): 29-31, 12(in Chinese).

[6] Wang Yansong, Geng Aili, Zhang Lijun. A study on nonstationary vibration in time-frequency domain for four-wheel vehicles based on wavelet transform[J]. Automotive Engineering, 2004, 26(2): 177-182(in Chinese).