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Multiple Analytic Band-Pass Filter and Its Application in Demodulation Analysis
Author(s): 
Pages: 385-392
Year: Issue:  3
Journal: JOURNAL OF VIBRATION ENGINEERING

Keyword:  信号处理滤波解调分析细化频谱;
Abstract: 复调制带通滤波器具有负频率为零、冲击响应函数实部和虚部有90°相移的特点,能将带通滤波和希尔伯特变换合为一体,只要选择合适的滤波参数,在解调分析中将不包括故障信息的时域相加信号滤掉,且能避免广义检波滤波解调分析中的混频效应.利用此原理,并将最大细化倍数与带通滤波器的宽度之间建立了严格的数学关系,以避免为了大幅度提高运算速度而只对选抽点进行变换可能产生的频混现象,优化了现代设备故障诊断广泛应用的窄带希尔伯特变换解调分析的算法.
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