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Electro-Mechanical Actuation System Early Fault Feature Extraction Based on EMD Power Spectrum Method
Author(s): 
Pages: 29-32
Year: Issue:  10
Journal: Measurement & Control Technology

Keyword:  机电作动系统故障诊断、预测与健康管理经验模态分解;
Abstract: 提出一种改进的基于经验模态分解(EMD)功率谱分析的特征提取方法,该方法自适应地将故障信号分解为不同频段上的基本模式分量(IMF)之和,然后只提取对故障敏感的IMF分量的功率谱.由于只有少数IMF对故障敏感,该方法能获得具有较高信噪比的原数据特征信息,这对预测功率变换器早期故障趋势具有极其重要的应用价值.实验结果表明,该方法可有效提取早期隐性故障特征,为飞机机电作动系统的故障预测和健康评估提供必要的前期准备.
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