【摘要】 本文研究了齿轮振动信号调制与解调的过程与机理。并根据希尔伯特变换理论,提出了一种早期诊断齿轮故障的新方法—瞬时频率波动(TFF—Transient FrequencyFluctuation)分析法,实现了频率调制信号的解调,较好地提取了齿轮的局部损伤信息。在大量试验与分析的基础上对该方法进行了验证。更多还原

【Abstract】 A new way for detecting gear fault by signal processing is proposed, which is called TFF (Transient Frequency Fluctuation) analysis. The technique is based on the Time Domain Average and Hilbert Transform. Much analysis is made oa the modulation of gear vibration signal due to defects. Through FM demodulation, the frequency modulation signal TFF (t) can be extracted which is consistent in relation to gear defects. Experimental results show that the proposed approach can give earlier indication of gear malfunction than other conventional methods.更多还原