US 10,704,796 B2 · HVAC system with timeseries dimensional mismatch handling

Abstract

A heating, ventilation, and air conditioning (HVAC) system for a building includes a plurality of actuation devices, a plurality of sensors, and a controller. The actuation devices receive actuation signals and operate in accordance with the actuation signals to affect one or more variables in the building. The sensors measure the variables affected by the actuation devices and provide sensor response signals including values of the measured variables. The controller generates actuation signal timeseries including samples of the actuation signals and sensor response timeseries including samples of the sensor response signals. The controller applies a discrete cosine transformation (DCT) to each actuation signal timeseries and each sensor response timeseries. Each DCT generates a set of DCT coefficients. The controller identifies a similarity between two or more of the actuation signal timeseries and the sensor response timeseries by comparing the DCT coefficients resulting from the DCTs.

Claims20

Dependent claims

A heating, ventilation, and air conditioning (HVAC) system for a building, the HVAC system comprising:

a plurality of actuation devices configured to receive actuation signals and to operate in accordance with the actuation signals to affect one or more variables in the building;
a plurality of sensors configured to measure the one or more variables affected by the actuation devices and to provide sensor response signals comprising values of the one or more variables;
and
a controller configured to:
generate one or more actuation signal timeseries comprising a plurality of samples of the actuation signals and one or more sensor response timeseries comprising a plurality of samples of the sensor response signals;
apply a discrete cosine transformation (DCT) to each of the actuation signal timeseries and each of the sensor response timeseries, each of the DCTs generating a set of DCT coefficients;
and
identify a similarity between two or more of the actuation signal timeseries and the sensor response timeseries by comparing the DCT coefficients resulting from the DCTs.

5 more elements

A method for handling dimensional mismatches between timeseries in a heating, ventilation, and air conditioning (HVAC) system for a building, the method comprising:

operating a plurality of actuation devices to affect one or more variables in the building by providing actuation signals to the actuation devices;
receiving sensor response signals from a plurality of sensors configured to measure the one or more variables affected by the actuation devices, the sensor response signals comprising values of the one or more variables;
generating one or more actuation signal timeseries comprising a plurality of samples of the actuation signals and one or more sensor response timeseries comprising a plurality of samples of the sensor response signals;
applying a discrete cosine transformation (DCT) to each of the actuation signal timeseries and each of the sensor response timeseries, each of the DCTs generating a set of DCT coefficients;
and
identifying a similarity between two or more of the actuation signal timeseries and the sensor response timeseries by comparing the DCT coefficients resulting from the DCTs.

3 more elements

Dependencies are inferred from the claim text.

HVAC system with timeseries dimensional mismatch handling

Life of this patent

HVAC system with timeseries dimensional mismatch handling

Life of this patent

Abstract

Claims20