Vol: 32 , Nr: 4 , Art.: 2
Tytuł / Title:
An application of the coherence function in diagnosing marine engine injection pumps
Autorzy / Authors:
BEJGER Artur dr inż.
Maritime University of Szczecin
Słowa kluczowe / key words:
marine engine; diagnostics of injection pumps; injection system; coherence function; acoustic emission
Streszczenie / Summary:

The suitability of the coherence function for marine engine injection pump diagnostics is
described. The function was used for the examination of recorded acoustic emission elastic wave
signals. Characteristic frequencies from a specific fault symptom were identified. It was proved
that, with known multipliers defined for each normal coordinate, the interpretation of observation
results allows to find unknown functions of fault symptoms. In this way, we can solve a problem
of identification of a mathematical model sensitive to changes in a fault parameter.