SYSTEMS AND METHODS FOR STEADY STATE DETECTION
First Claim
1. A building management system comprising:
- connected equipment configured to measure a plurality of monitored variables; and
a predictive diagnostics system comprising;
a communications interface configured to receive samples of the monitored variables from the connected equipment;
a steady state detector configured to;
recursively update a mean and a variance of the samples each time a new sample is received;
identify whether each of the samples reflects a steady state or a transient state of operation of the connected equipment using the mean and the variance; and
associate each of the samples to the steady state or the transient state as identified; and
a controller configured to adjust an operation of the connected equipment based on the steady state or the transient state as identified.
3 Assignments
0 Petitions
Accused Products
Abstract
A building management system includes connected equipment and a predictive diagnostics system. The connected equipment is configured to measure a plurality of monitored variables. The predictive diagnostics system includes a communications interface, a steady state detector, a controller. The communications interface is configured to receive samples of the monitored variables from the connected equipment. The steady state detector is configured to recursively update a mean and a variance of the samples each time a new sample is received, identify whether each of the samples reflects a steady state or a transient state of operation of the connected equipment using the mean and the variance, and associate each of the samples to the steady state or the transient state as identified. The controller is configured to adjust an operation of the connected equipment based on the steady state or the transient state as identified.
11 Citations
20 Claims
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1. A building management system comprising:
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connected equipment configured to measure a plurality of monitored variables; and a predictive diagnostics system comprising; a communications interface configured to receive samples of the monitored variables from the connected equipment; a steady state detector configured to; recursively update a mean and a variance of the samples each time a new sample is received; identify whether each of the samples reflects a steady state or a transient state of operation of the connected equipment using the mean and the variance; and associate each of the samples to the steady state or the transient state as identified; and a controller configured to adjust an operation of the connected equipment based on the steady state or the transient state as identified. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for monitoring and controlling connected equipment in a building management system, the method comprising:
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measuring a plurality of monitored variables at the connected equipment; receiving samples of the monitored variables at a predictive diagnostics system; recursively updating a mean and a variance of the samples each time a new sample is received; identifying whether each of the samples reflects a steady state or a transient state of operation of the connected equipment using the mean and the variance; associating each of the samples to the steady state or the transient state as identified; and adjusting an operation of the connected equipment based on the steady state or the transient state as identified. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A heating, ventilation, or air conditioning (HVAC) system comprising:
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connected equipment configured to measure a plurality of monitored variables; a predictive diagnostics system configured to; receive samples of the monitored variables from the connected equipment; recursively update a variance of the samples, a slope of the variance, and a second derivative of the variance each time a new sample is received; determine whether the slope is no greater than a first threshold and whether the second derivative of the variance is positive; and in response to determining that the slope is no greater than the first threshold and the second derivative of the variance is positive, associate the new sample with a steady state operation of the connected equipment; and a controller configured to adjust an operation of the connected equipment based on whether the new sample is associated with the steady state or a transient state. - View Dependent Claims (20)
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Specification