METHOD AND DEVICE FOR PROVIDING A CONDITION EVALUATION OF A MECHANICAL STRUCTURE WHICH INCLUDES A ROTATABLE MACHINE COMPONENT

摘要

A method for providing a condition evaluation of a mechanical structure which includes a rotating machine component includes providing an input signal that represents mechanical vibrations in the mechanical structure and selecting, on the basis of the input signal and a number of reference signals, one among a plurality of predetermined condition evaluations for the mechanical structure. When the rotating machine component includes a gear transmission, the condition evaluation is selected using amplitude demodulation. When the machine component includes a rotating bearing, the condition evaluation is selected using cross-correlation.

主权项

1. A method for providing a condition evaluation of a mechanical structure which includes a rotating machine component, the method comprising:
providing an input signal that represents mechanical vibrations in the mechanical structure; providing a reference signal; selecting, on the basis of the input signal and the reference signal, one among a plurality of predetermined condition evaluations for the mechanical structure, wherein the reference signal is generated on the basis of at least one parameter for the rotating machine component and a rotational speed for the rotating machine component, characterized in that
the machine component comprises a gear transmission, and the provision of the reference signal comprises generating a modulated stationary periodic signal, and the step of selecting one of a plurality of condition evaluations comprises amplitude demodulation of the input signal, orthe machine component comprises a rotating bearing, and the provision of the reference signal comprises generating a periodic pulse signal, and the step of selecting one of a plurality of condition evaluations comprises calculating cross-correlation between the input signal and the reference signal.