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论文类型：期刊论文

发表时间：2014-09-01

发表刊物：JOURNAL OF VIBROENGINEERING

收录刊物：SCIE、EI

卷号：16

期号：6

页面范围：2874-2893

ISSN号：1392-8716

关键字：Hilbert spectrum; frequency resolution; estimation model; instantaneous impact signal

摘要：In this paper, frequency resolution determination method is investigated according to Hilbert spectrum performance for impact signal analysis. A new constructed performance estimation model for the best frequency resolution is put forward in this research for the impact signal pattern recognition. Different parameters in the time-frequency distribution by using Hilbert spectrum are considered in this estimation model for the best frequency resolution determination. To verify the effectiveness of this estimation model, numerical simulation is used for Hilbert spectrum construction analysis. At the same time, different marine diesel engine working condition signals analysis are also used to illustrate the methodology developed in this research and verify the effectiveness. It can be concluded that this method can contribute the development for impact signal analysis by using Hilbert spectrum.