The slices of the bispectrum and trispectrum are plotted for the vibration signals of the speed control value when it works both under normal condition and under fault condition. 摘要為了解決液壓元件調速閥故障診斷難的問題，採用三譜及其切片分析的方法，針對調速閥閥體正常和故障時的振動信號，分別繪製出其雙譜切片和三譜切片圖。
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