| 摘要 |
<p>PURPOSE:To obtain an abnormality diagnostic device for automating a parameter tuning capable of hunting time sequential data by calculating a tuning parameter for hunting calculation only from time sequential data without preparing a reference value. CONSTITUTION:The abnormality diagnostic device is provided with a spectrum calculating means 21 for finding out a power spectrum from time sequential data and a spectrum shape calculating means 22 for finding out the peak frequency f0 of the power spectrum and frequency values f1, f2 applying half band width. A hunting parameter determining means 23 finds out tuning parameters T1, T2 for a hunting calculating expression T1S/ (1+T2S) from the frequency values f0, f1, f2 found out by the means 22 based upon T1=1/2pif1, f1=2f0/pi, T2=1/2pif2, and f2=4f0/pi. Since all tuning parameters for hunting data can be calculated from the time sequential data based upon the calculation, automatic parameter tuning can be attained.</p> |
