Systems and methods for adaptively updating equipment models
First Claim
1. A system for generating and using a predictive model to control building equipment, the system comprising:
- building equipment operable to affect one or more variables in a building;
an operating data aggregator configured to collect a first set of operating data for the building equipment during a first time period;
an autocorrelation corrector configured to remove an autocorrelated model error from the first set of operating data by;
determining a residual error representing a difference between an actual output of the building equipment and an output predicted by the predictive model;
using the residual error to calculate an autocorrelation for the model error; and
transforming the first set of operating data using the autocorrelation;
a model generator module configured to generate a first set of model coefficients for the predictive model using the transformed first set of operating data; and
a controller configured to control the building equipment by executing a model-based control strategy that uses the predictive model.
3 Assignments
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Accused Products
Abstract
A system for generating and using a predictive model to control building equipment includes building equipment operable to affect one or more variables in a building and an operating data aggregator that collects a set of operating data for the building equipment. The system includes an autocorrelation corrector that removes an autocorrelated model error from the set of operating data by determining a residual error representing a difference between an actual output of the building equipment and an output predicted by the predictive model, using the residual error to calculate an autocorrelation for the model error, and transforming the set of operating data using the autocorrelation. The system includes a model generator module that generates a set of model coefficients for the predictive model using the transformed set of operating data and a controller that controls the building equipment by executing a model-based control strategy that uses the predictive model.
336 Citations
20 Claims
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1. A system for generating and using a predictive model to control building equipment, the system comprising:
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building equipment operable to affect one or more variables in a building; an operating data aggregator configured to collect a first set of operating data for the building equipment during a first time period; an autocorrelation corrector configured to remove an autocorrelated model error from the first set of operating data by; determining a residual error representing a difference between an actual output of the building equipment and an output predicted by the predictive model; using the residual error to calculate an autocorrelation for the model error; and transforming the first set of operating data using the autocorrelation; a model generator module configured to generate a first set of model coefficients for the predictive model using the transformed first set of operating data; and a controller configured to control the building equipment by executing a model-based control strategy that uses the predictive model. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for detecting a fault in a predictive model for building equipment, the system comprising:
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building equipment operable to affect one or more variables in a building; an operating data aggregator module configured to collect a first set of operating data for the building equipment during a first time period and a second set of operating data for the building equipment during a second time period; an autocorrelation corrector configured to remove an autocorrelated model error from the first set of operating data and the second set of operating data by; determining a residual error representing a difference between an actual output of the building equipment and an output predicted by the predictive model; using the residual error to calculate an autocorrelation for the model error; and transforming the first set of operating data and the second set of operating data using the autocorrelation; a model generator module configured to generate a first set of model coefficients for the predictive model using the transformed first set of operating data and a second set of model coefficients for the predictive model using the transformed second set of operating data; a fault detection module configured to generate a fault indication in response to a determination that the predictive model has changed, the determination based on the first and second sets of model coefficients; and a controller configured to control the building equipment by executing a model-based control strategy that uses the predictive model. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A method for identifying changes in a predictive model for building equipment, the method comprising:
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operating building equipment to affect one or more variables in a building; collecting a first set of operating data for the building equipment during a first time period; removing an autocorrelated model error from the first set of operating data by; determining a residual error representing a difference between an actual output of the building equipment and an output predicted by the predictive model; using the residual error to calculate an autocorrelation for the model error; and transforming the first set of operating data using the autocorrelation; generating a first set of model coefficients for the predictive model using the transformed first set of operating data; in response to a determination that the predictive model has changed, triggering an action comprising at least one of generating a fault indication and adaptively updating the predictive model; and controlling the building equipment by executing a model-based control strategy that uses the predictive model. - View Dependent Claims (18, 19, 20)
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Specification