Diagnostic method, system and device for a rotorcraft drive system
First Claim
1. A method of diagnosing an anomaly of a monitored component in a drive train, the method comprising:
- obtaining, by a device configured to diagnose an anomaly, original data based on samples of a vibration signal and a tachometer signal;
generating, by the device configured to diagnose an anomaly, a time synchronous average vibration signal;
processing, by the device configured to diagnose an anomaly, the time synchronous average vibration signal to produce a frequency-domain spectrum;
determining, by the device configured to diagnose an anomaly, complex magnitudes of the frequency-domain spectrum;
selecting, by the device configured to diagnose an anomaly, a sub-synchronous band of the complex magnitudes of the frequency-domain spectrum to generate a sub-synchronous spectrum;
determining, by the device configured to diagnose an anomaly, a mean of the sub-synchronous spectrum to generate a condition indicator;
determining a plurality of condition indicators;
based upon the plurality of condition indicators, determining an unhealthy condition of the plurality of condition indicators;
identifying an unhealthy component; and
adjusting at least one of operation and maintenance of the unhealthy component.
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Accused Products
Abstract
There is a method, system, and device for diagnosing an anomaly of a monitored component in a drive train, the method including obtaining original data based on samples of a vibration signal and a tachometer signal; generating a time synchronous average vibration signal; processing the time synchronous average vibration signal to produce a frequency-domain spectrum; determining the complex magnitudes of the frequency-domain spectrum; selecting a sub-synchronous band of the complex magnitudes of the frequency-domain spectrum to generate a sub-synchronous spectrum; and determining the mean of the sub-synchronous spectrum to generate a condition indicator.
32 Citations
15 Claims
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1. A method of diagnosing an anomaly of a monitored component in a drive train, the method comprising:
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obtaining, by a device configured to diagnose an anomaly, original data based on samples of a vibration signal and a tachometer signal; generating, by the device configured to diagnose an anomaly, a time synchronous average vibration signal; processing, by the device configured to diagnose an anomaly, the time synchronous average vibration signal to produce a frequency-domain spectrum; determining, by the device configured to diagnose an anomaly, complex magnitudes of the frequency-domain spectrum; selecting, by the device configured to diagnose an anomaly, a sub-synchronous band of the complex magnitudes of the frequency-domain spectrum to generate a sub-synchronous spectrum; determining, by the device configured to diagnose an anomaly, a mean of the sub-synchronous spectrum to generate a condition indicator; determining a plurality of condition indicators; based upon the plurality of condition indicators, determining an unhealthy condition of the plurality of condition indicators; identifying an unhealthy component; and adjusting at least one of operation and maintenance of the unhealthy component. - View Dependent Claims (2, 3, 4, 12)
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5. A device configured to diagnose an anomaly of a monitored component in a drive train, the device comprising:
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a memory configured to store original data of at least one of a vibration signal and a tachometer signal; one or more processors in communication with the memory, the one or more processors being configured to; obtain original data based on samples of the vibration signal and the tachometer signal; generate a time synchronous average vibration signal; process the time synchronous average vibration signal to produce a frequency-domain spectrum; determine complex magnitudes of the frequency-domain spectrum; select a sub-synchronous band of the complex magnitudes of the frequency-domain spectrum to generate a sub-synchronous spectrum; determine a mean of the sub-synchronous spectrum to generate a condition indicator; determine a plurality of condition indicators; based upon the plurality of condition indicators, determine an unhealthy condition of the plurality of condition indicators; identify an unhealthy component; and adjust at least one of operation and maintenance of the unhealthy component. - View Dependent Claims (7, 8, 13)
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6. The device, further comprising a tachometer and at least one accelerometer.
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9. A system for diagnosing an anomaly of a monitored component in a drive train, the system comprising:
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a rotorcraft comprising a body, a power train coupled to the body and comprising a power source and a drive train coupled to the power source; a tachometer coupled to the drive train; a vibration sensor system coupled to the drive train; and a diagnostic device associated with the vibration sensor system, the diagnostic device operable to; obtain original data based on samples of a vibration signal from the vibration sensor system and a tachometer signal from the tachometer; generate a time synchronous average vibration signal; process the time synchronous average vibration signal to produce a frequency-domain spectrum; determine complex magnitudes of the frequency-domain spectrum; select a sub-synchronous band of the complex magnitudes of the frequency-domain spectrum to generate a sub-synchronous spectrum; determine a mean of the sub-synchronous spectrum to generate a condition indicator; determine a plurality of condition indicators; based upon the plurality of condition indicators, determine an unhealthy condition of the plurality of condition indicators; identify an unhealthy component; and adjust at least one of operation and maintenance of the unhealthy component. - View Dependent Claims (14)
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10. A non-transitory computer-readable storage medium encoded with instructions that, when executed, cause one or more processors of a computing device to diagnose an anomaly of a monitored component in a drive train to:
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obtain original data based on samples of a vibration signal and a tachometer signal; generate a time synchronous average vibration signal; process the time synchronous average vibration signal to produce a frequency-domain spectrum; determine complex magnitudes of the frequency-domain spectrum; select a sub-synchronous band of the complex magnitudes of the frequency-domain spectrum to generate a sub-synchronous spectrum; determine a mean of the sub-synchronous spectrum to generate a condition indicator; determine a plurality of condition indicators; based upon the plurality of condition indicators, determine an unhealthy condition of the plurality of condition indicators; identify an unhealthy component; and adjust at least one of operation and maintenance of the unhealthy component. - View Dependent Claims (11, 15)
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Specification