Method and system for diagnostics and prognostics of a mechanical system
First Claim
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1. A health maintenance system for a mechanical system, comprising:
- A vibration sensor, the vibration sensor acquiring vibrational data relating to the mechanical system;
A data processing circuit, the data processing circuit including a transformation module transforming the data acquired by the vibrational sensor to signature data in a plurality of domains, the signature data associated with at least one predetermined pointer location corresponding to known faults of the mechanical system;
A diagnosis circuit, the diagnosis circuit extracting features from the signature data by reference to said pointer location associated each signature data, the data diagnosis module employing at least one index function to provide features corresponding to each pointer location and signature data;
A decision circuit, the decision circuit determining a health status for the mechanical system by reference to the features provided by the diagnosis circuit.
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Abstract
A vibrational analysis system diagnosis the health of a mechanical system by reference to vibration signature data from multiple domains. Features are extracted from signature data by reference to pointer locations. The features provide an indication of signature deviation from a baseline signature in the observed domain. Several features applicable to a desired fault are aggregated to provide an indication of the likelihood that the fault has manifested in the observed mechanical system. The system may also be used for trend analysis of the health of the mechanical system.
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Citations
47 Claims
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1. A health maintenance system for a mechanical system, comprising:
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A vibration sensor, the vibration sensor acquiring vibrational data relating to the mechanical system;
A data processing circuit, the data processing circuit including a transformation module transforming the data acquired by the vibrational sensor to signature data in a plurality of domains, the signature data associated with at least one predetermined pointer location corresponding to known faults of the mechanical system;
A diagnosis circuit, the diagnosis circuit extracting features from the signature data by reference to said pointer location associated each signature data, the data diagnosis module employing at least one index function to provide features corresponding to each pointer location and signature data;
A decision circuit, the decision circuit determining a health status for the mechanical system by reference to the features provided by the diagnosis circuit. - View Dependent Claims (2, 3)
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4. A health prognosis method for a mechanical system, the method comprising the steps of:
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monitoring at least one operational parameter of said mechanical system;
detecting an anomaly in said operational parameters;
recording at least vibrational data in response to detecting said anomaly;
processing said vibrational data to provide features associated with said mechanical system;
trending said features by a prognosis module to provide an expected future feature data; and
analyzing said future feature data to determine an expected effect on said mechanical system. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11)
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12. A method for providing a health indication for a mechanical system, comprising:
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receiving vibrational data from a data collection unit;
processing the vibrational data to provide at least one wide-band frequency-domain signature and at least one other signature in another domain;
extracting feature data from said signatures by reference to pointer locations for the signatures and corresponding index functions, the pointer locations and index functions associated with known faults of the mechanical system; and
comparing the feature data with feature data associated with known system faults to provide a health indication for the mechanical system.
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13. A method for diagnosing the health of a mechanical system, the method comprising the steps of:
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receiving vibrational data from at least one sensor monitoring the mechanical system;
processing the vibrational data to provide features associated with said mechanical system;
comparing the provided features with features associated with of known fault conditions; and
determining whether a fault condition should be indicated for said mechanical system based on said comparing.
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14. A computer implemented health diagnostic system for a mechanical system, comprising:
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at least one vibration sensor positioned to collect vibration data of at least one component of said mechanical system;
a data processing circuit, the data processing circuit including a processing unit which transforms the vibration data into signatures in a plurality of domains, each signature data in each domain is associated with at least one pointer, said pointers related to at least one known fault condition of the mechanical system;
a diagnostic circuit, the diagnostic circuit employs an index function of each pointer location to extract feature data from each signature; and
a decision circuit, the decision circuit deriving a health status from said feature data extracted by the diagnosis circuit. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A health prognostic method for a mechanical system, the method comprising:
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detecting a deviation of operational data, including vibrational data, from a predetermined normal;
recording at least vibration data in response to detecting said anomaly;
transforming the vibration data into signatures in a plurality of domains;
extracting features from said signatures to provide features that are indicative of a health status of a component of said mechanical system;
trending said extracted features to provide expected future feature data; and
analyzing said future feature data to provide a prognosis of an expected parameter state for said mechanical system. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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38. A method for providing a health indication for a mechanical system, comprising:
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collecting vibration data by a data collection unit;
processing the vibration data to provide at least one wide-band frequency-domain signature and at least one other signature in another domain;
extracting feature data from said signatures by reference to at least one pointer location for the signatures and by employing a corresponding index function, the pointer location and index function associated with known faults of the mechanical system; and
comparing the feature data with feature data associated with known system faults to provide a health indication for the mechanical system.
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39. A method for diagnosing the health of a mechanical system, comprising:
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collecting vibration data by employing at least one vibration sensor;
deriving vibration signatures in multiple domains by transforming the vibration data to multiple domains;
extracting data from each signature by reference to predetermined pointer data;
employing an index function to extract feature data from the vibration signatures in the various domains by comparing said extracted data to baseline data associated with the index function;
aggregating feature data associated with a known fault;
comparing said feature data to a predetermined threshold to diagnose the health of the mechanical system. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46, 47)
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Specification