Separability of Convolutive Mixtures: Application to the Separation of Combustion Noise and Piston-Slap in Diesel Engine

Akil, Moussa; Servière, Christine

doi:10.1007/11679363_40

Cited by 2 publications

(2 citation statements)

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“…In the noise source identification of the engine, signal processing-based approach is quite popular these days because of its comprehensive performance in accuracy [4,5], flexibility, and cost-saving [6,7]. Lots of method have been proposed, such as the cyclic Wiener filtering [8,9], the timefrequency analysis [10][11][12], the blind source separation [13,14], and the coherent spectrum analysis (CSA) [15]. But it is still very difficult for only using one signal processing method to perfectly handle the complex noise problem.…”

Section: Introductionmentioning

confidence: 99%

A Fuzzy‐Based Analytic Hierarchy Process for Mechanical Noise Source Identification of a Diesel Engine

Zhang

Zhou

Lin

et al. 2019

Shock and Vibration

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In this paper, a novel fuzzy-based analytic hierarchy process (FAHP) is proposed for identifying noise sources of diesel engine and sorting their contributions. e hierarchy tree consists of 5 levels including the component level, the frequency band level, the test point level, the operating condition level, and the overall noise level. e variational mode decomposition (VMD) is employed to decompose the overall noise into several frequency bands. e factor weights between levels are determined by the partial coherence analysis (PCA) to consider the correlation of component vibration and radiated noise in different frequency bands. A fuzzy consistency matrix is then constructed to order the corresponding factors level by level that can avoid the consistence problem of the traditional AHP. Based on the rig test of a diesel engine, the proposed approach is implemented to weight the noise sources identified. It is shown the overall weighting order of the six major noise sources is (in descending order) the oil pan, the left block, the valve cover, the flywheel housing, and the right block.

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Section: Introductionmentioning

confidence: 99%

A Fuzzy‐Based Analytic Hierarchy Process for Mechanical Noise Source Identification of a Diesel Engine

Zhang

Zhou

Lin

et al. 2019

Shock and Vibration

View full text Add to dashboard Cite

show abstract

“…The main contributions are based on : filtered vibration oscillations (Souder et al (2004)), time-frequency analysis (Carstens-Behrens et al (2002)), cepstrum (Randall et al (1996)) and source separation (Akil and Servière (2006)). With these techniques, the knock signal is the main input and the robustness of the combustion variable estimation strongly rely on the availability of the combustion related information on the vibration trace.…”

Section: Introductionmentioning

confidence: 99%