A denoising procedure using wavelet packets for instantaneous detection of pantograph oscillations

被引：42
作者：
Mercorelli, Paolo [1 ]
机构：
[1] Leuphana Univ Lueneburg, Inst Prod & Proc Innovat PPI, D-21339 Luneburg, Germany
来源：
MECHANICAL SYSTEMS AND SIGNAL PROCESSING | 2013年 / 35卷 / 1-2期
关键词：
Noise detection; Oscillation detection; Wavelets; Pantograph control;
D O I：
10.1016/j.ymssp.2012.09.001
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
This paper presents a robust online denoising algorithm for use in the online, instantaneous detection of changing harmonic signals. This algorithm uses a classical time correlation function (scalar product). For instantaneous frequency detection, a short window is considered. It is known that cleaned signals are required to determine the correct correlation between short signals. The measured signal is cleaned by the proposed noise removal algorithm, which uses wavelet packets. The proposed cleaning method avoids classical thresholding techniques. Computer simulations that validate the procedure are shown. (c) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：137 / 149
页数：13
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