It is suggested that low frequency fluctuation occurs with cavitation inception in water hydraulic pump.

提出了在纯水液压泵中气蚀初生伴随着低频压力脉动现象。

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Second, this thesis analyses algorithm precision in case of frequency fluctuation and presents improving measures.

其次，分析了由于频率偏移影响傅氏算法精度并提出其改进措施。

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For uniform time sampling, the level of frequency fluctuation will greatly influence the results of spectrum analysis.

采用等时隙采样方法，频率随机波动的大小则会严重影响谱分析的结果。

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