The spectrum analysis and sine wave curve fitting are the most common methods used for ADC dynamic performance tests.
谱分析法和正弦拟合法是ADC动态特性测试的两种常用方法。
Besides, at the non-drive-end of the primary shaft, some mechanical fitting in the bearing case were detected loosen, through spectrum-zoom analysis and waveform comparison in the time-domain.
另外，由转频附近细化谱分析及时域波形比较，发现输入轴非电机端轴承座内机件还有径向配合松动故障。
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