Method and apparatus for signal signature analysis for event detection in rotating machinery
First Claim
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1. A method for analyzing a vibration event comprising:
- acquiring a vibration signal;
isolating a vibration signal event in the acquired signal;
determining a natural frequency of the vibration signal event, using a damped sinusoid corresponding to the natural frequency to characterize the vibration signal event, and using the characteristic damped sinusoid to identify an occurrence of the vibration signal event in another vibration signal.
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Abstract
A method for analyzing vibration including: acquiring a vibration signal; isolating a vibration signal event in the acquired signal; determining a frequency of a damped sinusoid of the vibration signal event, wherein the damped sinusoid characterizes the vibration signal event, and using the characteristic damped sinusoid to identify an occurrence of the vibration signal event in another vibration signal.
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Citations
21 Claims
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1. A method for analyzing a vibration event comprising:
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acquiring a vibration signal;
isolating a vibration signal event in the acquired signal;
determining a natural frequency of the vibration signal event, using a damped sinusoid corresponding to the natural frequency to characterize the vibration signal event, and using the characteristic damped sinusoid to identify an occurrence of the vibration signal event in another vibration signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for modeling a vibration event comprising:
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acquiring a vibration signal generated by a rotating machine;
isolating a vibration signal event in the acquired signal;
determining a natural frequency of the vibration signal event using a short-term Fourier Transform, using a damped sinusoid corresponding to the natural frequency to characterize the vibration signal event, and using the characteristic damped sinusoid to identify an occurrence of the vibration signal event in another vibration signal. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A system for monitoring a rotating machine comprising:
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a vibration sensor coupled to the machine, said vibration sensor producing a signal;
a physics based signal analyzer (PBSA) further comprising a signal conditioning and analysis unit and a display and control unit, wherein the signal conditioning and analysis unit generates a characteristic damped sinusoid applied to the signal and identifies vibration events in the signal corresponding to the sinusoid, and wherein the display and control unit generates a display image showing the identified vibration events. - View Dependent Claims (20, 21)
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Specification