Computer identification of changes in vibroacoustic signals

The application is discussed of some parametric statistical tests in analyzing data obtained by frequency analysis of vibroacoustic signals of acceleration in the main circulating pumps in both units of the V-1 nuclear power plant at Jaslovske Bohunice. The procedure is shown of discretizing analog signals and of their subsequent processing using the programmable IN 110 signal analyzer, up to obtaining a defined data set from the measurement. This then forms a basis for further statistical processing. The statistical tests applied can be classified into pair tests (F test, T test) and methods allowing the analysis of any finite number of sets (dispersion analysis with simple classification, the so-called Adamenkov test). Preliminary experience justifies a claim that the said procedures show high sensitivity. (author)