Diesel engine combustion and mechanical noise separation using an improved spectrofilter

被引：65

作者：

Pruvost, L. ^{[1
]}

Leclere, Q. ^{[1
]}

Parizet, E. ^{[1
]}

机构：

[1] INSA, LVA, F-69621 Villeurbanne, France

来源：

MECHANICAL SYSTEMS AND SIGNAL PROCESSING | 2009年 / 23卷 / 07期

关键词：

Diesel engine noise; Combustion noise; Source separation; Spectrofilter; EFFECTIVE VIBRATION ANALYSIS; PART I; CYCLOSTATIONARITY; RECONSTRUCTION; SIGNALS;

D O I：

10.1016/j.ymssp.2009.04.001

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The present paper is dedicated to diesel engine combustion and mechanical noise separation. It is shown that this separation can be performed by a spectrofilter if and only if the spectrofilter is computed using only the random part of the engine signals. This source separation is a difficult task, since the sources are correlated and overlapped both in time and frequency domains. Considering only the random part of the signals virtually uncorrelates the noise sources, making them easier to separate. This approach is validated by the results of a simulation. An experiment based on real engine signals shows that the spectrofilter is more causal and more robust if computed using only the signals random part. This experiment also shows that speed rotation and load condition affect the engine transfer functions. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：2072 / 2087

页数：16