Methods for establishing alerts and/or alert limits for monitoring mechanical devices
First Claim
1. A method for establishing at least one of an alert or an alert limit for monitoring a mechanical device, said method comprising:
- identifying faults that can be recognized by their effect on measured trends;
determining a set of available sensors for monitoring said trends;
acquiring and processing representative data to obtain a statistical characterization of said trends;
determining a parameter variance for at least one alert test in accordance with said statistical characterization;
analyzing Type I and Type II error risks and associated financial penalties to adjust parameters associated with the at least one alert test; and
programming an automated alert system to utilize the adjusted parameters to identify measured trends of a mechanical device that are to be brought to the attention of a human analyst.
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Abstract
A method for establishing an alert or an alert limit for monitoring a mechanical device includes identifying faults that can be recognized by their effect on measured trends and determining a set of available sensors for monitoring the trends. Representative data are acquired and processed to obtain a statistical characterization of the trends. In addition, a parameter variance is determined for at least one alert test in accordance with the statistical characterization. The method further includes analyzing Type I and Type II error risks and associated financial penalties to adjust parameters associated with the alert test and programming an automated alert system to utilize the adjusted parameters to identify measured trends of a mechanical device that are to be brought to the attention of a human analyst.
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Citations
21 Claims
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1. A method for establishing at least one of an alert or an alert limit for monitoring a mechanical device, said method comprising:
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identifying faults that can be recognized by their effect on measured trends;
determining a set of available sensors for monitoring said trends;
acquiring and processing representative data to obtain a statistical characterization of said trends;
determining a parameter variance for at least one alert test in accordance with said statistical characterization;
analyzing Type I and Type II error risks and associated financial penalties to adjust parameters associated with the at least one alert test; and
programming an automated alert system to utilize the adjusted parameters to identify measured trends of a mechanical device that are to be brought to the attention of a human analyst. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for establishing at least one of an alert or an alert limit for monitoring a mechanical device, wherein the mechanical device is an aircraft engine, and said method comprises:
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reviewing one or more manuals from the set consisting of engine manuals and aircraft manuals to identify faults that can be recognized by their effect on measured trends;
determining a set of available sensors for monitoring said trends;
acquiring and processing representative data to obtain a statistical characterization of said trends;
determining a parameter variance for at least one alert test in accordance with said statistical characterization;
analyzing Type I and Type II error risks and associated financial penalties to adjust parameters associated with the at least one alert test; and
programming an automated alert system to utilize the adjusted parameters to identify measured trends of a mechanical device that are to be brought to the attention of a human analyst. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification