Fault detection system and associated method
AssigneeGeneral Electric Company
InventorsPrabhakar Neti, Pinjia Zhang
Life of this patent
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Abstract
A method implemented using a controller based device includes receiving a measured electrical signal from an electrical device of an electromechanical device and receiving a measured vibration signal from a mechanical device of the electromechanical device, coupled to the electrical device. The method further includes determining a first signal signature based on the measured electrical signal and determining a second signal signature based on the measured vibration signal. The method also includes determining a diagnostic parameter based on the first signal signature and the second signal signature and determining a fault in the mechanical device based on the diagnostic parameter.
Claims16
A system, comprising:
- a controller based device configured to:
- receive measured electrical signals from an electrical device of an electromechanical device, wherein the electrical signals are representative of a measured current and a measured voltage of the electrical device;
- receive a measured vibration signal from a mechanical device of the electromechanical device, coupled to the electrical device, wherein the mechanical device comprises a drive train;
- determine a first signal signature based on the measured electrical signal by determining a spectrum of the electrical signal, wherein the spectrum may comprise a Fourier transform, a discrete Fourier transform, or a wavelet transform;
- determine a second signal signature based on the measured vibration signal by performing a fast Fourier transform of the measured vibration signal;
- determine a third signal signature based on the first signal signature and the second signal signature
- determine a diagnostic parameter based on the first signal signature and the second signal signature, wherein the controller based device is further configured to determine the diagnostic parameter based on the third signal signature by computing at least one of an average value, a peak value, a median value of at least one of the first signal signature, the second signal signature and the third signal signature;
- and
- determine a fault of the mechanical device based on the diagnostic parameter.
A non-transitory computer readable medium encoded with a program to instruct a controller based device to:
- receive measured electrical signals from an electrical device of an electromechanical device, wherein the electrical signals are representative of a measured current and a measured voltage of the electrical device;
- receive a measured vibration signal from a mechanical device of the electromechanical device, coupled to the electrical device, wherein the mechanical device comprises a drive train;
- determine a first signal signature based on the measured electrical signal by determining a spectrum of the electrical signal, wherein the spectrum may comprise a Fourier transform, a discrete Fourier transform or a wavelet transform;
- determine a second signal signature based on the measured vibration signal performing a fast Fourier transform of the measured vibration signal;
- determine a third signal signature based on the first signal signature and the second signal signature
- determine a diagnostic parameter based on the first signal signature and the second signal signature, wherein the controller based device is further configured to determine the diagnostic parameter based on the third signal signature by computing at least one of an average value, a peak value, a median value of at least one of the first signal signature, the second signal signature and the third signal signature;
- and
- determine a fault of the mechanical device based on the diagnostic parameter.
Dependencies are inferred from the claim text.