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公开(公告)号：US20200326676A1
公开(公告)日：2020-10-15
申请号：US16381851
申请日：2019-04-11
摘要： A self-optimizing controller for equipment of a plant provides a manipulated variable as an input to the plant and receives an output variable as feedback. The controller generates a performance variable model defining the performance variable as a function of the manipulated variable and an output variable model defining the output variable as a function of the manipulated variable. The controller uses the performance variable model to determine a gradient of the performance variable, uses the output variable model to determine a gradient of the output variable, and generates a self-optimizing variable based on the gradient of the performance variable model and the gradient of the output variable model. The controller operates the equipment of the plant to affect a variable state or condition of the building based on the value of the self-optimizing variable from the self-optimizing variable model.
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公开(公告)号：US10732585B2
公开(公告)日：2020-08-04
申请号：US16241655
申请日：2019-01-07
发明人： Timothy I. Salsbury , John M. House
摘要： A self-configuring extremum-seeking controller includes a dither signal generator, a communications interface, a phase delay estimator, and a bandwidth estimator. The dither signal generator identifies a stored dither frequency, generates a dither signal having the stored dither frequency, and uses the dither signal to perturb a control input for a plant. The communications interface provides the perturbed control input to the plant and receives an output signal from the plant resulting from the perturbed control input. The phase delay estimator estimates a phase delay between the output signal and the dither signal. The bandwidth estimator estimates a bandwidth of the plant based on the estimated phase delay. The dither signal generator updates the stored dither frequency based on the estimated bandwidth.
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公开(公告)号：US20200159177A1
公开(公告)日：2020-05-21
申请号：US16198539
申请日：2018-11-21
IPC分类号： G05B19/042
摘要： An on-off control system includes on-off equipment configured to operate in either an on state or an off state, an on-off controller configured to cause the equipment to transition between the on state and the off state based on a setpoint value and a deadband value to drive a control variable toward the setpoint value, and a deadband controller, according to some embodiments. In some embodiments, the deadband controller is configured to generate the deadband value used by the on-off controller. In some embodiments, the deadband controller is configured to generate the deadband value by obtaining a cost function that defines a cost based on at least a set of control values and the deadband value and selecting the deadband value that results in an optimal value of the cost function over a range of possible deadband values, the selected deadband value defining an optimal deadband value.
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公开(公告)号：US20200041157A1
公开(公告)日：2020-02-06
申请号：US16531892
申请日：2019-08-05
发明人： Timothy I. Salsbury , John M. House
IPC分类号： F24F11/46 , F24F11/523 , F24F11/62 , G05D23/19
摘要： A space controller and method for determining energy savings of the space controller are provided. The method includes estimating, by one or more processing circuits, a steady state gain of a controlled variable of a heating, ventilation, and air conditioning (HVAC) system; determining, by the one or more processing circuits, an actual runtime that HVAC equipment of the HVAC system is in an on state based on a first setpoint or schedule; predicting, by the one or more processing circuits, a reduction of runtime that the HVAC equipment is in the on state for a second setpoint or schedule based on the actual runtime and the steady state gain; and adjusting, by the one or more processing circuits, the first setpoint or schedule to the second setpoint or schedule based on the reduction of runtime.
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公开(公告)号：US20190293308A1
公开(公告)日：2019-09-26
申请号：US16438854
申请日：2019-06-12
发明人： Timothy I. Salsbury , John M. House
摘要： An extremum-seeking control system for a plant includes a feedback controller for operating the plant to achieve a value of a manipulated variable, and an extremum-seeking controller. The extremum-seeking controller is configured to provide the value of the manipulated variable to the feedback controller and to determine a value for the manipulated variable. The extremum-seeking controller determines the value for the manipulated variable by perturbing the manipulated variable with an excitation signal and monitoring a performance variable of the plant resulting from the perturbed manipulated variable, estimating a normalized correlation coefficient relating the performance variable to the manipulated variable, and modulating the manipulated variable to drive the normalized correlation coefficient toward zero using a general set of tuning parameters. The general set of tuning parameters are adapted for use with the normalized correlation coefficient, independent of a scale of the performance variable.
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公开(公告)号：US10364997B2
公开(公告)日：2019-07-30
申请号：US15448179
申请日：2017-03-02
发明人： Timothy I. Salsbury , John M. House
IPC分类号： F24F3/00 , F24F7/08 , F24F11/30 , F24F11/56 , F24F11/58 , F24F11/61 , F24F11/62 , F24F11/65 , G05B19/042
摘要： A controller includes a communications interface configured to provide a control input to and receive feedback from a plant. The feedback is representative of a response of the plant to the control input over a response period. The controller further includes a time constant estimator. The time constant estimator calculates a normalized variable based on the feedback, each value of the normalized variable representative of the response of the plant at a different time during the response period. The time constant estimator calculates a plurality of time constant estimates, based on the plurality of values of the normalized variable. The time constant estimator determines a maximum time constant from the time constant estimates. The controller further includes a control input generator that generates the control input for the plant using the maximum time constant. The control input affects a variable state or condition of the plant.
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37.发明授权公开(公告)号：US10253997B2
公开(公告)日：2019-04-09
申请号：US15625605
申请日：2017-06-16
摘要： Disclosed is a system to control a climate of a space via a first control loop and a second control loop interacting with the first control loop. The system includes a first controller of the first control loop to generate a first control signal based on a first modified set point and a first feedback signal. The system further includes a second controller of the second control loop to generate a second control signal based on a second modified set point and a second feedback signal. The system further includes a decoupler configured to predict a first effect of the first control signal on the second control loop and a second effect of the second control signal on the first control loop, and generate the first modified set point and the second modified set point to reduce the first effect and the second effect.
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公开(公告)号：US20180284701A1
公开(公告)日：2018-10-04
申请号：US15476465
申请日：2017-03-31
CPC分类号： G05B13/021 , F24F11/30 , F24F11/52 , F24F11/62 , F24F11/65
摘要： A control system is configured to operate a multiple-input system to achieve an optimal value for a performance variable of the multiple-input system. The control system includes a mapper configured to generate a mapping from a first number of manipulated variables to a second number of latent variables. The second number is smaller than the first number and each of the latent variables includes a linear combination of the manipulated variables. The control system also includes an extremum-seeking controller configured to receive the performance variable from the multiple-input system as a feedback and modulate values of the second number of latent variables to drive the performance variable to the optimal value. The mapper is further configured to use the mapping to translate modulated values of the second number of latent variables to modulated values of the first number of manipulated variables and provide the modulated values of the first number of manipulated variables to the multiple-input system.
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公开(公告)号：US20180267515A1
公开(公告)日：2018-09-20
申请号：US15461222
申请日：2017-03-16
发明人： John M. House , Timothy I. Salsbury
IPC分类号： G05B19/418
CPC分类号： G05B19/4188 , F24F11/46 , F24F11/63 , F24F11/64 , F24F2110/10 , G05B13/022 , G05B2219/43112
摘要： A control system is configured to operate a plant to achieve an optimal value for a performance variable of the plant. The system comprise a feedforward controller configured to receive a measurable disturbance to the plant and generate a feedforward contribution to a control input to the plant using the measurable disturbance. The system also comprises an extremum-seeking controller configured to receive the performance variable from the plant and generate an extremum-seeking contribution to the control input to drive the performance variable to the optimal value. The system further comprises a control input element configured to generate the control input by combining the extremum-seeking contribution and the feedforward contribution and provide the control input to the plant.
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公开(公告)号：US20180252422A1
公开(公告)日：2018-09-06
申请号：US15448179
申请日：2017-03-02
发明人： Timothy I. Salsbury , John M. House
IPC分类号： F24F11/00 , G05B19/042
CPC分类号： F24F11/30 , F24F3/00 , F24F7/08 , F24F11/56 , F24F11/58 , F24F11/61 , F24F11/62 , F24F11/65 , G05B19/0426 , G05B2219/2614
摘要： A controller includes a communications interface configured to provide a control input to and receive feedback from a plant. The feedback is representative of a response of the plant to the control input over a response period. The controller further includes a time constant estimator. The time constant estimator calculates a normalized variable based on the feedback, each value of the normalized variable representative of the response of the plant at a different time during the response period. The time constant estimator calculates a plurality of time constant estimates, based on the plurality of values of the normalized variable. The time constant estimator determines a maximum time constant from the time constant estimates. The controller further includes a control input generator that generates the control input for the plant using the maximum time constant. The control input affects a variable state or condition of the plant.
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