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考虑信号特点的合成量子启发结构元素

, PP. 1181-1188

Keywords: 仪器仪表技术,结构元素,量子理论,局部特征,随机性

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Abstract:

受量子理论启发,结合数学形态滤波器中的膨胀算子,提出合成量子启发结构元素(Compoundquantum-inspiredstructuringelement,CQSE),用于增强故障振动信号中的冲击响应成分。CQSE综合考虑了信号的局部特征和随机性,其高度能够跟随信号的变化进行动态调整。首先,建立了量子启发结构元素(Quantum-inspiredstructuringelement,QSE)的基本数学表达式。随后,采用峭度描述冲击响应信号的局部特征,并用于生成QSE在实数空间的单一形式(Singleforminrealspace,SFRS)的高度;采用信号的归一化振动大小描述信号的随机性,并用于计算不同SFRS出现的量子概率。然后,结合量子概率,通过数学期望,对不同的SFRS进行合成,获得应用于膨胀算子的CQSE。最后,将CQSE应用于轴承故障诊断,有效地增强了故障信息。

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