Intelligent condition monitoring and fault diagnostic system for preventative maintenance
First Claim
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1. A continuous health monitoring system comprising:
- a controller includinga non-transitory data collection function that acquires unparametrized time histories of one or more component energy dissipation values during component operations;
a non-transitory pre-processing function that characterizes each unparametrized time history of the one more component energy dissipation values independently and computes metrics from characteristics of each independently characterized unparametrized time history of the one or more component energy dissipation values using an operational energy dissipation from the time histories and a baseline energy dissipation;
a non-transitory analysis function for evaluating whether the computed metrics exceed predetermined threshold values to produce one or more hypotheses of a condition of one or more components corresponding to the one or more component energy dissipation values; and
a non-transitory reasoning function for determining the condition of the one or more components from the one or more hypotheses,wherein the data collection, pre-processing, and analysis functions operate in parallel with the component operations.
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Abstract
A system for condition monitoring and fault diagnosis includes a data collection function that acquires time histories of selected variables for one or more of the components, a pre-processing function that calculates specified characteristics of the time histories, an analysis function for evaluating the characteristics to produce one or more hypotheses of a condition of the one or more components, and a reasoning function for determining the condition of the one or more components from the one or more hypotheses.
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Citations
42 Claims
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1. A continuous health monitoring system comprising:
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a controller including a non-transitory data collection function that acquires unparametrized time histories of one or more component energy dissipation values during component operations; a non-transitory pre-processing function that characterizes each unparametrized time history of the one more component energy dissipation values independently and computes metrics from characteristics of each independently characterized unparametrized time history of the one or more component energy dissipation values using an operational energy dissipation from the time histories and a baseline energy dissipation; a non-transitory analysis function for evaluating whether the computed metrics exceed predetermined threshold values to produce one or more hypotheses of a condition of one or more components corresponding to the one or more component energy dissipation values; and a non-transitory reasoning function for determining the condition of the one or more components from the one or more hypotheses, wherein the data collection, pre-processing, and analysis functions operate in parallel with the component operations. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of continuously monitoring system health comprising:
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acquiring unparametrized time histories of one or more component energy dissipation values during component operations; characterizing each unparametrized time history of the one or more component energy dissipation values independently and computing metrics, during the component operations, from characteristics of each independently characterized unparametrized time history of the one or more component energy dissipation values using an operational energy dissipation from the time histories and a baseline energy dissipation; in parallel with the component operations, evaluating whether the computed metrics exceed predetermined threshold values to produce one or more hypotheses of a condition of one or more components corresponding to the one or more component energy dissipation values; and determining the condition of the one or more components from the one or more hypotheses. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A continuous heath monitoring system comprising:
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a controller including a non-transitory data collection function that acquires unparametrized time histories of one or more values related to power consumption by a component during operation; a non-transitory pre-processing function that characterizes each unparametrized time history of the one or more values related to power consumption independently and computes metrics from characteristics of each independently characterized unparametrized time history of the one or more values related to power consumption using an operational power consumption computed from the time histories and a power consumption baseline; a non-transitory analysis function for evaluating whether the computed metrics exceed predetermined threshold values to produce one or more hypotheses of a condition of the component; and a non-transitory reasoning function for determining the condition of the component from the one or more hypotheses, wherein the data collection, pre-processing, and analysis functions operate in parallel with the component operations. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26)
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27. A method of continuously monitoring system health comprising:
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acquiring unparametrized time histories of one or more power consumption related values of a component during operation; characterizing each unparametrized time history of the one or more power consumption related values independently and computing metrics from characteristics of each independently characterized unparametrized time history of the one or more power consumption related values during the component operations using an operational power consumption computed from the unparametrized time histories and a power consumption baseline; in parallel with the component operations, evaluating whether the computed metrics exceed predetermined threshold values to produce one or more hypotheses of a condition of the component; and determining the condition of the component from the one or more hypotheses. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34)
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35. system for automatic fault diagnosis comprising:
a controller including a non-transitory data collection function that acquires unparametrized time histories of selected power consumption related values for one or more components of a device in response to deterioration in the operation of the device; a non-transitory pre-processing function that characterizes each unparametrized time history of the selected power consumption related values independently by calculating specified characteristics of the unparametrized time stories including a range and a minimum variance and requests additional unparametrized time history acquisition if certain thresholds are not met for the range and minimum variance; a non-transitory analysis function for evaluating the characteristics to produce one or more hypotheses of a condition of the one or more components; and a non-transitory reasoning function for determining faults of the one or more components or of the device from the one or more hypotheses. - View Dependent Claims (36, 37, 38)
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39. A method for automatic fault diagnosis comprising:
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acquiring time unparametrized histories of selected power consumption related values for one or more components of a device in response to deterioration in the operation of the device; characterizing each unparametrized time history of the selected power consumption related values independently by calculating specified characteristics of the unparametrized time histories including a range and a minimum variance and requests additional unparametrized time history acquisition if certain thresholds are not met for t e range and minimum variance; evaluating the characteristics to produce one or more hypotheses of a condition of the one or more components; and determining faults of the one or more components or of the device from the one or more hypotheses. - View Dependent Claims (40, 41, 42)
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Specification