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. 摘要为了解决液压元件调速阀故障诊断难的问题，采用三谱及其切片分析的方法，针对调速阀阀体正常和故障时的振动信号，分别绘制出其双谱切片和三谱切片图。
