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    Adaptive training and deployment of single chiller and clustered chiller fault detection models for connected chillers
    3.
    发明授权
    Adaptive training and deployment of single chiller and clustered chiller fault detection models for connected chillers 有权

    公开(公告)号：US11474485B2

    公开(公告)日：2022-10-18

    申请号：US16198456

    申请日：2018-11-21

    Applicant: Johnson Controls Tyco IP Holdings LLP

    Inventor： Young M. Lee ,  Sugumar Murugesan ,  ZhongYi Jin ,  Jaume Amores ,  Kelsey Carle Schuster ,  Steven R. Vitullo ,  Henan Wang

    IPC: G05B13/04 ,  F24F11/38 ,  F24F11/63 ,  G06N20/00 ,  F24F11/64 ,  G05B13/02 ,  G06N5/04

    Abstract: A chiller fault prediction system for a building, including one or more memory devices and one or more processors. The one or more memory devices are configured to store instructions to be executed on the one or more processors. The one or more processors are configured to receive chiller data for a plurality of chillers, the chiller data indicating performance of the plurality of chillers. The one or more processors are configured to generate, based on the received chiller data, a plurality of single chiller prediction models and a plurality of cluster chiller prediction models, the plurality of single chiller prediction models generated for each the plurality of chillers and the plurality of cluster chiller prediction models generated for chiller clusters of the plurality of chillers. The one or more processors are configured to label each of the plurality of single chiller prediction models and the plurality of cluster chiller prediction models as an accurately predicting chiller model or an inaccurately predicting chiller model based on a performance of each of the plurality of single chiller prediction models and a performance of each of the plurality of cluster chiller prediction models. The one or more processors are configured to predict a chiller fault with each of the plurality of single chiller prediction models labeled as the accurately predicting chiller models. The one or more processors are configured to predict a chiller fault for each of a plurality of assigned chillers assigned to one of a plurality of clusters labeled as the accurately predicting chiller model.

    Building system with adaptive fault detection
    5.
    发明授权
    Building system with adaptive fault detection 有权

    公开(公告)号：US11243523B2

    公开(公告)日：2022-02-08

    申请号：US16725940

    申请日：2019-12-23

    Applicant: Johnson Controls Tyco IP Holdings LLP

    Inventor： Jaume Amores Llopis ,  Young M. Lee ,  Sugumar Murugesan ,  Steven R. Vitullo

    IPC: G05B23/02

    Abstract: A building system for detecting faults in an operation of building equipment. The building system comprising one or more memory devices configured to store instructions thereon that cause one or more processors to perform a cumulative sum (CUSUM) analysis on actual building data and corresponding predicted building data to obtain cumulative sum values for a plurality of times within a first time period; determine a first time at which a first cumulative sum value is at a first maximum; identify a second cumulative sum value at a second maximum at a second time occurring after the first time; compare the identified second cumulative sum value to a threshold; and based on determining that the identified second cumulative sum value does not exceed the threshold, determine that a first fault ended at the first time.

    Stability index for connected equipment
    7.
    发明授权
    Stability index for connected equipment 有权

    公开(公告)号：US11519620B2

    公开(公告)日：2022-12-06

    申请号：US17028704

    申请日：2020-09-22

    Applicant: Johnson Controls Tyco IP Holdings LLP

    Inventor： Steven R. Vitullo ,  Kelsey Carle Schuster ,  Michael Richard Rhodes ,  Jonathan Cox

    IPC: F24F11/30 ,  F24F11/62 ,  G05B15/02 ,  F24F110/10

    Abstract: A method for determining a stability of a building device includes receiving time series data from building equipment regarding a first operational parameter of the building equipment, determining, for one or more time steps of the time series data, a deviation between a setpoint and a recorded value of the first operational parameter, calculating, for the one or more time steps, a trapezoidal area based on an absolute value of the deviation and a length of a time step, calculating a stability index value for the building equipment by summing the trapezoidal areas for a subset of the one or more time steps over a time horizon, and initiating an automated response based on the stability index value.

    Systems and methods for adaptively tuning thresholds for fault detection in buildings
    9.
    发明授权
    Systems and methods for adaptively tuning thresholds for fault detection in buildings 有权

    公开(公告)号：US11599071B2

    公开(公告)日：2023-03-07

    申请号：US16355066

    申请日：2019-03-15

    Applicant: Johnson Controls Tyco IP Holdings LLP

    Inventor： Steven R. Vitullo

    IPC: G05B13/04 ,  G06F17/18 ,  F24F11/47 ,  G06Q50/06

    Abstract: A building system including one or more memory devices configured to store instructions that, when executed on one or more processors, cause the one or more processors to determine an average of a minimum half of sorted energy consumption values for a first time period and determine an average of a maximum half of sorted energy consumption values for a second time period. The instructions also cause the processor to determine a ratio of the average of the minimum half of sorted energy consumption values for the first time period to the average of the maximum half of sorted energy consumption values for the second time period, compare the calculated ratio to an adaptively tunable threshold value and activate a system responsive to the calculated ratio exceeding the adaptively tunable threshold value.

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