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公开(公告)号：US20210181703A1
公开(公告)日：2021-06-17
申请号：US16711080
申请日：2019-12-11
摘要： A self-perturbing extremum-seeking controller for a plant that includes at least a static portion includes a processing circuit. The processing circuit is configured to obtain a value of a performance variable characterizing a performance of the plant. The processing circuit is configured to determine a sign of a gradient of the performance variable with respect to an input to the static portion of the plant. The processing circuit is configured to adjust a control input for the plant using the sign of the gradient, and provide the control input to the plant to affect the performance variable.
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公开(公告)号：US20200348635A1
公开(公告)日：2020-11-05
申请号：US16399751
申请日：2019-04-30
IPC分类号： G05B19/042 , G05B19/048
摘要： Systems and methods for monitoring and controlling a plant using extremum-seeking control. The method includes perturbing a setpoint for a controller by applying a dither signal to the setpoint. The controller uses a perturbed setpoint to generate one or more control inputs for the building equipment. Receiving, from the building equipment, an output signal and obtaining values of a performance variable based on the output signal, the values of the performance variable resulting from operating the building equipment based on the perturbed setpoint. The method includes determining a gradient of the performance variable with respect to the perturbed setpoint and a Hessian of the performance variable affected by the building equipment with respect to the setpoint. The method includes determining an adjustment to the setpoint predicted to drive the performance variable to an extremum based on the gradient and the Hessian of the performance variable.
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公开(公告)号：US09739496B2
公开(公告)日：2017-08-22
申请号：US14107978
申请日：2013-12-16
发明人： John E. Seem , John M. House
CPC分类号： F24F11/0009 , F24F11/30 , F24F11/61 , F24F2120/10 , G06N99/005
摘要： Systems and methods for estimating a time to cool down or warm up a building zone from a temperature setback condition are provided. A described method includes determining, by a controller for the building zone, at least one of a cooling demand for the building zone and a heating demand for the building zone for a time period corresponding to the temperature setback condition. The method further includes estimating a return time using at least one of the cooling demand and the heating demand. The return time is the time to cool down or warm up the building zone from the temperature setback condition.
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公开(公告)号：US20160084514A1
公开(公告)日：2016-03-24
申请号：US14495773
申请日：2014-09-24
发明人： Timothy I. Salsbury , John M. House
CPC分类号： F24F11/006 , F24F3/044 , F24F11/30 , F24F11/62 , Y02B30/767
摘要： A method for controlling an economizer in a building HVAC system includes providing a manipulated variable as an input to a control process, holding the manipulated variable at a first extremum during a first portion of an evaluation period, and applying a dither signal to the manipulated variable during a second portion of the evaluation period. The dither signal causes the manipulated variable to deviate from the extremum. The method further includes monitoring a variable of interest output by the control process during the first and second portions of the evaluation period and switching the manipulated variable to a second extremum opposite the first extremum in response to the variable of interest moving toward an optimal value during the second portion of the evaluation period.
摘要翻译： 一种用于控制建筑物HVAC系统中的节能器的方法包括提供操作变量作为控制过程的输入，在评估周期的第一部分期间将操纵变量保持在第一极值，并将抖动信号施加到操纵变量 在评估期的第二部分。 抖动信号使操纵变量偏离极值。 该方法还包括在评估周期的第一和第二部分期间监视由控制过程输出的感兴趣的变量，并且响应于感兴趣的变量在最初的值向着最佳值切换到第一极值的第二极值 评估期的第二部分。
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公开(公告)号：US11686480B2
公开(公告)日：2023-06-27
申请号：US16740020
申请日：2020-01-10
IPC分类号： F24F5/00 , F24F11/30 , F24F11/62 , F24F11/77 , F24F11/83 , F24F11/85 , F24F140/60 , F24F11/63 , F24F11/54
CPC分类号： F24F5/0035 , F24F11/30 , F24F11/62 , F24F11/77 , F24F11/83 , F24F11/54 , F24F11/63 , F24F11/85 , F24F2140/60
摘要： A method for performing extremum-seeking control of a plant includes determining multiple values of a correlation coefficient that relates a control input provided as an input to the plant to a performance variable that characterizes a performance of the plant in response to the control input. The performance variable includes a noise-free portion and an amount of noise. The method includes determining an adjusted correlation coefficient by scaling a first value of the correlation coefficient selected from the multiple values relative to a second value of the correlation coefficient selected from the multiple values. The adjusted correlation coefficient relates the noise-free portion of the performance variable to the control input. The method includes using the adjusted correlation coefficient to modulate the control input provided as an input to the plant.
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公开(公告)号：US11460822B2
公开(公告)日：2022-10-04
申请号：US16711080
申请日：2019-12-11
摘要： A self-perturbing extremum-seeking controller for a plant that includes at least a static portion includes a processing circuit. The processing circuit is configured to obtain a value of a performance variable characterizing a performance of the plant. The processing circuit is configured to determine a sign of a gradient of the performance variable with respect to an input to the static portion of the plant. The processing circuit is configured to adjust a control input for the plant using the sign of the gradient, and provide the control input to the plant to affect the performance variable.
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公开(公告)号：US11092354B2
公开(公告)日：2021-08-17
申请号：US16447783
申请日：2019-06-20
摘要： A method for controlling flow in a heating, ventilation, and air conditioning (HVAC) system that imposes an upper limit on the flow of fluid through a heating or cooling coil. Imposing this limit on the flow rate ensures that a temperature change across the coil remains above a minimum threshold and can significantly reduce energy waste. The method includes receiving a first temperature measurement associated with an inlet of the coil, receiving a second temperature measurement associated with an outlet of the coil, and receiving a flow measurement associated with the valve, applying the first temperature measurement, the second temperature measurement, and the flow measurement as input to a model, determining a maximum flow rate that ensures that a difference between the first temperature measurement and the second temperature measurement is above a threshold using the model, and operating the valve in accordance with the maximum flow rate.
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公开(公告)号：US20210180811A1
公开(公告)日：2021-06-17
申请号：US16711890
申请日：2019-12-12
摘要： A method of controlling signal transmission in a building control system including measuring a number of signal values associated with an environmental variable using a sensor of a wireless device, dynamically determining, by the wireless device, a noise threshold based on the number of signal values, combining a first signal value and a second signal value of the number of signal values using a mathematical relationship to determine a result associated with the first signal value and the second signal value, and periodically transmitting the first signal value from the wireless measurement device to a controller in response to the result exceeding the noise threshold.
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公开(公告)号：US20210025608A1
公开(公告)日：2021-01-28
申请号：US16523913
申请日：2019-07-26
摘要： A controller for HVAC equipment of a plant includes a processing circuit configured to predict an impact of a time delay of the plant on a performance variable received as feedback from the plant. The processing circuit is configured to artificially increase or decrease a value of the performance variable using an adjustable time delay parameter to at least partially negate the impact of the time delay on the performance variable. The processing circuit is configured to use the artificially increased or decreased value of the performance variable in on-off feedback control to operate the HVAC equipment.
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20.发明申请公开(公告)号：US20200326666A1
公开(公告)日：2020-10-15
申请号：US16379742
申请日：2019-04-09
摘要： A building management system includes building equipment configured to operate in accordance with an input to alter a variable state or condition of a building, a feedback controller configured to generate the input as a function of a measured state of the building equipment, and an analytics circuit. The analytics circuit is configured to obtain and store a dataset comprising the measured state and the input for a plurality of time steps, determine, based on at least a portion of the dataset, a self-optimizing control function that defines a self-optimizing control variable as a function of the measured state, calculate a value of the self-optimizing control variable using the self-optimizing control function and the measured state, monitor the value of the self-optimizing control variable over time, and generate an indication of performance of the building equipment relative to optimal performance based on the value of the self-optimizing control variable.
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