解调分析的一种优化方法

An Optimized Method of Demodulation

在分析当前的解调方法原理和实现方法的基础上，针对宽带解调方法将不包括故障的两时域相加信号，也以频率之差作为调制信号解出而引起误诊断的特点［４］，提出将带通滤波与希尔伯特变换和细化重抽样有机结合起来的解调算法。提高了解调分析的速度和精度，克服了希尔伯特变换应用的局限性。

Broad bandth demodulation methods usually lead to erroneous diagnosis when demodulating two compound signals containing no faults information with difference of frequencies. Based on the analysis of current demodulation principles and realization methods the authors put forward a new demodulation algorithm which combine band pass filter with Hilbert alternation and refining resampling. The speed and accuracy of demodulation analysis are improved greatly, and the limitation of Hilbert alternation is overcome.