摘要
Based on lower and upper triangular matrix (LU) decomposition of the power spectral density (PSD) matrix of road roughness for different wheel tracks, the transfer functions of road roughness was presented for different wheel tracks to two independent white noises signals. The coherent function in transfer functions was rationally approximated by Pade expansion. In addition, the complex transcendental function related to the coherent function in the transfer functions was rationally approximated by Chebyshev-Pade expansion. Based on white noises filtering (WNF) method, a 2D random road simulation model considering coherence function of different wheel tracks was constructed. The simulation results show that the Auto-PSD and the coherence function of different wheel tracks are in great agreement with the standard functions respectively. It is verified that the transfer functions derived from LU decomposition of PSD matrix of different wheel tracks and its Pade expansion and Chebyshev-Pade expansion possess high reliability in the simulation of 2D road roughness.
| 投稿的翻译标题 | Spatial Domain Reconstruction of Road Roughness Based on White Noises Filtering |
|---|---|
| 源语言 | 繁体中文 |
| 页（从-至） | 48-52 |
| 页数 | 5 |
| 期刊 | Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology |
| 卷 | 41 |
| 期 | 1 |
| DOI | |
| 出版状态 | 已出版 - 1月 2021 |
关键词
- Chebyshev-Pade expansion
- Coherence function
- Lower and upper triangular matrix (LU)decomposition
- Pade expansion
- Power spectral density (PSD)
- Road roughness
- White noises filtering method