基于 AR双谱与分形盒维数的减压阀故障诊断

摘要

通过采集的减压阀正常和故障下的振动信号，求出了时间序列的自回归双谱和分形盒维数。结果表明：不同状态下的双谱谱图和盒维数有明显的区别，利用AR双谱和盒维数可以有效地诊断出减压阀的工作状态。%The fractal box dimensions were calculated and the AR bispectrum were figured out by using the vibration signal with normal and faulty of pressure reducing valve collected. The results show that the AR bispectrum and the box dimensions are quite different in evidence under different conditions. So the working condition of pressure reducing valve can be effectively diagnosed by the AR bispectrum and fractal box dimension.