Abstract

Vibration signal analysis is a foundation of fault diagnosis, while the common used method is to analyse the characteristic quantities extracted from an original waveform of a particular measuring point in a particular moment. It lacks of abilities in fault classification. Based on information fusion of process, two kinds of information exergy indicators are proposed and defined in this paper, to represent the change rule between different states in a same process and the rule of corresponding state changes in different processes. On this basis, a new fault diagnosis method of information exergy of rotating machinery based on space-time feature spectrum in frequency domain is first proposed. The method has been validated by analysing vibration signals and diagnosing faults of a rotor test platform.

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