System and method for estimating turbine engine deterioration rate with noisy data
First Claim
1. A method for monitoring engine performance, comprising:
- sampling exhaust gas temperature data associated with a turbine engine over an interval of operational time of the turbine engine;
applying a first test to identify statistical outliers on the sampled exhaust gas temperature data;
removing identified statistical outliers from the sampled exhaust gas temperature data;
applying a second test to identify step changes in slope of the exhaust gas temperature data;
dividing the interval of operational time into one or more segments based upon the identified step changes;
determining a slope for each segment;
combining the segments to obtain a rate of performance deterioration of the turbine engine; and
outputting, storing, displaying, or a combination thereof, data related to the rate of performance deterioration.
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Accused Products
Abstract
A method for monitoring engine performance includes sampling exhaust gas temperature associated with a turbine engine over an interval of operational time of the turbine engine. The method further includes applying a first test to identify statistical outliers on the sampled exhaust gas temperature data and removing identified statistical outliers from the sampled exhaust gas temperature data. Subsequently, the method includes applying a second test to identify step changes in slope of the exhaust gas temperature data and dividing the interval of operational time into one or more segments based upon the identified step changes. Finally, the method includes determining a slope for each segment and combining the segments to obtain a rate of performance deterioration of the turbine engine.
25 Citations
21 Claims
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1. A method for monitoring engine performance, comprising:
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sampling exhaust gas temperature data associated with a turbine engine over an interval of operational time of the turbine engine; applying a first test to identify statistical outliers on the sampled exhaust gas temperature data; removing identified statistical outliers from the sampled exhaust gas temperature data; applying a second test to identify step changes in slope of the exhaust gas temperature data; dividing the interval of operational time into one or more segments based upon the identified step changes; determining a slope for each segment; combining the segments to obtain a rate of performance deterioration of the turbine engine; and outputting, storing, displaying, or a combination thereof, data related to the rate of performance deterioration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for monitoring engine performance, comprising:
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identifying and eliminating any statistical outliers and step changes from exhaust gas temperature data of individual turbine engines; identifying any X-range gaps in the exhaust gas temperature data of individual turbine engines to segment the exhaust gas temperature data; obtaining a rate of change of exhaust gas temperature for each turbine engine after identifying and eliminating any statistical outliers and step changes and identifying any X-range gaps; combining the rates of change of exhaust gas temperature of individual turbine engines to determine an average rate of change of exhaust gas temperature of a fleet including a plurality of turbine engines; and outputting, storing, displaying, or a combination thereof, data related to the average rate of change of exhaust gas temperature. - View Dependent Claims (18)
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19. A method for monitoring engine performance, comprising:
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sampling exhaust gas temperature data associated with a turbine engine over an interval of operational time of the turbine engine; applying a first test to identify statistical outliers on the sampled exhaust gas temperature data; removing identified statistical outliers from the sampled exhaust gas temperature data; applying a second test to identify step changes in slope of the exhaust gas temperature data; dividing the interval of operational time into one or more segments based upon the identified step changes; determining a slope for each segment; combining the segments to obtain a rate of performance deterioration of the turbine engine; and outputting a notice, a command, or a combination thereof, associated with the rate of performance deterioration to a display, a control, or a combination thereof, of a system having the turbine engine.
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20. A method for monitoring engine performance, comprising:
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identifying and eliminating any statistical outliers and step changes from exhaust gas temperature data of individual turbine engines; identifying any X-range gaps in the exhaust gas temperature data of individual turbine engines to segment the exhaust gas temperature data; obtaining a rate of change of exhaust gas temperature for each turbine engine after identifying and eliminating any statistical outliers and step changes and identifying any X-range gaps; combining the rates of change of exhaust gas temperature of individual turbine engines to determine an average rate of change of exhaust gas temperature of a fleet including a plurality of turbine engines; and outputting a notice, a command, or a combination thereof, associated with the average rate of change of exhaust gas temperature to a display, a control, or a combination thereof, of a system having the individual turbine engines.
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21. A method for monitoring engine performance, comprising:
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identifying and eliminating any statistical outliers and step changes from exhaust gas temperature data of individual turbine engines; identifying any X-range gaps in the exhaust gas temperature data of individual turbine engines to segment the exhaust gas temperature data; obtaining a rate of change of exhaust gas temperature for each turbine engine after identifying and eliminating any statistical outliers and step changes and identifying any X-range gaps; combining the rates of change of exhaust gas temperature of individual turbine engines to determine an average rate of change of exhaust gas temperature of a fleet including a plurality of turbine engines; and controlling downtime of the individual turbine engines based at least in part on the average rate of change of exhaust gas temperature.
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Specification