SYSTEMS AND METHODS FOR STATISTICAL CONTROL AND FAULT DETECTION IN A BUILDING MANAGEMENT SYSTEM
First Claim
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1. A controller for a building management system comprising:
- a processing circuit configured to at least one of receive or calculate an updated performance value for the building management system;
wherein the processing circuit is further configured to maintain at least one threshold parameter relative to a history of performance values, to determine an exponentially weighted moving average of the performance values, and to determine whether the moving average of the performance values is statistically significant by comparing the moving average to the at least one threshold parameter; and
wherein the processing circuit is further configured to generate an output that indicates a determination of statistical significance.
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Abstract
A building management strategy includes using exponentially weighted moving averages with statistical models to detect changes in the behavior of the building management system. Detected changes in the behavior of the system may indicate a detected fault, a change in a predicted behavior, or a need for the statistical models to be updated.
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Citations
20 Claims
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1. A controller for a building management system comprising:
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a processing circuit configured to at least one of receive or calculate an updated performance value for the building management system; wherein the processing circuit is further configured to maintain at least one threshold parameter relative to a history of performance values, to determine an exponentially weighted moving average of the performance values, and to determine whether the moving average of the performance values is statistically significant by comparing the moving average to the at least one threshold parameter; and wherein the processing circuit is further configured to generate an output that indicates a determination of statistical significance. - View Dependent Claims (2, 3, 4, 5)
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6. A method of detecting faults in a building management system, the method comprising:
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at a computer of the building management system, receiving first performance values for the building management system; calculating an exponentially weighted moving average using the performance values; determining if the moving average is statistically significant by comparing the moving average to a threshold parameter; receiving new performance values for the building management system; and updating the threshold parameter using the new performance values. - View Dependent Claims (7, 8, 9, 10, 11)
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12. A building management system comprising:
a processing circuit configured to receive first performance values, to generate an exponentially weighted moving average using the first performance values, to determine whether the moving average is statistically significant by comparing the moving average to the at least one threshold parameter, and to update the threshold parameter in response to a determination that the moving average is statistically significant. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
Specification