| Summary: | 碩士 === 國立虎尾科技大學 === 機械與機電工程研究所 === 98 === Due to the complexity of gear manufacturing process, the machining and assembly errors are two main factors in gear vibration and the associated noise. This thesis focuses on the investigation of gears vibration applying signal processing techniques. The signals play an important role in detecting the gears faults. Owing to the relations among spectral characteristics of the gears, rotational harmonics, the Gear Mesh Frequency(GMF), and the GMF harmonics and their sidebands, spectrum analysis can be applied in the gear vibration detection technologies. Different conditions are set in the experiment to study the vibrations. In the eperiment, effects of different teeth numbers of the gears, backlash, small iron shaving or mass attached on the gears surface, are studied by the FFT spectrum.
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