Patents by Inventor Alec Stothert
Alec Stothert has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11941545Abstract: Systems and methods may generate a boundary of a FOU for an interval type-2 MF based on a transformation of another boundary of the FOU. The systems and methods may receive a plurality of parameters for a type-1 MF that defines a boundary of the FOU for the interval type-2 MF and may receive at least one other parameter. The systems and methods may generate, based on a transformation of the type-1 MF utilizing the at least one parameter, a type-1 MF that defines a different boundary of the FOU. The system and methods may adjust the plurality of parameters and the at least one second parameter to adjust the FOU for use in a model representing, for example, a real-world physical system, where execution of the model executes a fuzzy inference system and generates results representing a behavior of the real-world physical system.Type: GrantFiled: December 17, 2019Date of Patent: March 26, 2024Assignee: The MathWorks, Inc.Inventors: Md Rajibul Huq, Alec Stothert
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Publication number: 20210182715Abstract: Systems and methods may generate a boundary of a FOU for an interval type-2 MF based on a transformation of another boundary of the FOU. The systems and methods may receive a plurality of parameters for a type-1 MF that defines a boundary of the FOU for the interval type-2 MF and may receive at least one other parameter. The systems and methods may generate, based on a transformation of the type-1 MF utilizing the at least one parameter, a type-1 MF that defines a different boundary of the FOU. The system and methods may adjust the plurality of parameters and the at least one second parameter to adjust the FOU for use in a model representing, for example, a real-world physical system, where execution of the model executes a fuzzy inference system and generates results representing a behavior of the real-world physical system.Type: ApplicationFiled: December 17, 2019Publication date: June 17, 2021Inventors: MD Rajibul Huq, Alec Stothert
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Patent number: 7933664Abstract: Modelling of industrial processes is simplified with the use of Mixed Logical Dynamic (MLD) framework. Optimal control problems can be generated for application to industrial processes. For example, two arbitrarily connected MLD blocks are automatically merged to obtain one composite MLD block. Via a repeated use of the procedure, any arbitrarily complex system containing the complete description of an industrial process can be generated from the simplest MLD building blocks. The optimal control problem is generated via adding an MLD block whose unique output becomes the cost functional of the problem. In a graphical environment, any specific industrial process may be reproduced by instantiating blocks from a library of basic MLD elements or atomic MLD blocks and by properly connecting them. In case an appropriate library is available, this process will not require any expert knowledge from the end user apart from the ability to build the graphical interconnections mentioned.Type: GrantFiled: December 4, 2006Date of Patent: April 26, 2011Assignee: ABB Research LtdInventors: Eduardo Alvarez Gallestey, Dario Castagnoli, Alec Stothert
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Patent number: 7865254Abstract: A method of manipulating a block diagram model with a plurality of graphical modeling components by defining an open loop anywhere on the block diagram model is provided. Graphical modeling components in series with the open loop may be automatically recognized and a plurality of parameters of the graphical modeling components in series with the open loop may be displayed on a display device. A user may simultaneously tune the parameters of the graphical modeling components in series with the open loop. Factorization points breaking the block diagram model in two disconnected parts may be identified in the block diagram model. A virtual graphical model may be generated by replacing a pattern of the graphical modeling components between two factorization points with a single graphical modeling component representing the pattern.Type: GrantFiled: October 24, 2007Date of Patent: January 4, 2011Assignee: The MathWorks, Inc.Inventors: Pascal Gahinet, John Glass, Alec Stothert, Craig Buhr
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Patent number: 7539604Abstract: The present invention provides a method of modifying the behavior of a modeled system from a graphical representation of the behavior of the system. Given a graphical representation of the behavior of a modeled system, one or more bounds may be selected for the behavior on the graphical representation. The necessary parameters for the modeled system are then determined for producing the desired behavior based on the selected bounds for the behavior.Type: GrantFiled: October 17, 2005Date of Patent: May 26, 2009Assignee: The MathWorks, Inc.Inventors: Alec Stothert, Craig Buhr, Anthony Lennon, Pascal Gahinet
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Patent number: 7426456Abstract: In a method and computer program product for optimal operation of a power plant and a power plant optimising system an optimisation mode (1) minimises a cost function (J[u],J[P]) that comprises a deviation of lifetime of plant components (LTp(?)) from a desired nominal lifetime trajectory (LTn(?)). This is done by, at a given time, determining future values of input values (u(?),P(?)) such as control values (P(?)) or process values (u(?)) to the plant and simulating, in a simulation modulate (2), the behaviour of the plant up to a given future time. Corresponding lifetime values are determined in the simulation, and incorporated in an objective function. The optimisation module (1) minimises the cost function (J[u],J[P]) by varying the input values (u(?),P(?)). As a result, it is possible to operate the plant such that component lifetime (LTp(?)) follows the desired trajectory (LTn(?)).Type: GrantFiled: November 19, 2002Date of Patent: September 16, 2008Assignee: ABB Research LtdInventors: Eduardo Gallestey Alvarez, Alec Stothert, Marc Antoine, Steve Morton
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Publication number: 20080172212Abstract: A method of manipulating a block diagram model with a plurality of graphical modeling components by defining an open loop anywhere on the block diagram model is provided. Graphical modeling components in series with the open loop may be automatically recognized and a plurality of parameters of the graphical modeling components in series with the open loop may be displayed on a display device. A user may simultaneously tune the parameters of the graphical modeling components in series with the open loop. Factorization points breaking the block diagram model in two disconnected parts may be identified in the block diagram model. A virtual graphical model may be generated by replacing a pattern of the graphical modeling components between two factorization points with a single graphical modeling component representing the pattern.Type: ApplicationFiled: October 24, 2007Publication date: July 17, 2008Applicant: The MathWorks, Inc.Inventors: Pascal Gahinet, John Glass, Alec Stothert, Craig Buhr
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Patent number: 7266416Abstract: The disclosed process control system makes use of Optimal control (OC) and model predictive control (MPC) techniques for selection of the Expert Systems (ES) targets values U. The ES target values U are selected to minimize the performance criterion J. A mathematical model of an extended system given by the process P and the ES is developed. This hybrid mathematical model has both continuous dynamics and logical relationships. Controlled variables of the mathematical model are the ES target values U and inputs are the measurements y and the performance criterion J. The OC and/or MPC techniques are used to compute values U. An optimizer of the OC/MPC selects values of the ES target values U only. This activity has lower sampling rates than selection of controller values, which simplifies the design of the OC/MPC controller.Type: GrantFiled: December 23, 2004Date of Patent: September 4, 2007Assignee: ABB Research LtdInventors: Eduardo Alvarez Gallestey, Alec Stothert
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Publication number: 20070143074Abstract: Modelling of industrial processes is simplified with the use of Mixed Logical Dynamic (MLD) framework. Optimal control problems can be generated for application to industrial processes. For example, two arbitrarily connected MLD blocks are automatically merged to obtain one composite MLD block. Via a repeated use of the procedure, any arbitrarily complex system containing the complete description of an industrial process can be generated from the simplest MLD building blocks. The optimal control problem is generated via adding an MLD block whose unique output becomes the cost functional of the problem. In a graphical environment, any specific industrial process may be reproduced by instantiating blocks from a library of basic MLD elements or atomic MLD blocks and by properly connecting them. In case an appropriate library is available, this process will not require any expert knowledge from the end user apart from the ability to build the graphical interconnections mentioned.Type: ApplicationFiled: December 4, 2006Publication date: June 21, 2007Applicant: ABB Research Ltd.Inventors: Eduardo Gallestey, Dario Castagnoli, Alec Stothert
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Publication number: 20070088447Abstract: A rescheduling problem can be reformulated as a multi-parametric (mp-QP) optimization problem which can be solved explicitly. The subsequent exploitation of this algebraic solution is computationally inexpensive.Type: ApplicationFiled: October 26, 2006Publication date: April 19, 2007Applicant: ABB Research LtdInventors: Alec Stothert, Andreas Poncet
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Patent number: 7058552Abstract: In a method and computer program product for optimizing power plant control values and a power plant optimizing system an optimization module (1) minimizes total plant operation costs while achieving predetermined required output values for produced power and process steam. This is done by, at a given time, determining future values of control values and simulating, in a simulation module (2), the behavior of the plant up to a given future time. Corresponding fuel costs and generated power are determined in the simulation, and incorporated in an objective function. The optimization module (1) minimizes the objective function by varying the control values. According to the invention, a rate of ageing of plant components is determined when simulating the future behavior of the plant, and the objective function to be minimized comprises said rate of ageing.Type: GrantFiled: December 19, 2001Date of Patent: June 6, 2006Assignee: ABB Research LtdInventors: Alec Stothert, Eduardo Gallestey Alvarez, Markus Ahrens, Marc Antoine, Steve Morton
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Publication number: 20050154476Abstract: The inventive process control system makes use of Optimal control (OC) and model predictive control (MPC) techniques for selection of the Expert Systems (ES) targets U. The ES target U is selected in such a way that the performance criterion J is minimized. In other words, a mathematical model of extended system given by the process P and the ES is developed. This mathematical model has hybrid nature in the sense that both continuous dynamics (mostly process) and logical relationships (mostly ES) appear in it. Controlled variables of the mathematical model are the ES targets U and inputs are the measurements y and the performance criterion J. OC and/or MPC techniques are used to compute U. The optimizer of the OC/MPC selects values of the ES targets U only. This activity has lower sampling rates than selection of C, which makes the design of the OC/MPC controlled easier.Type: ApplicationFiled: December 23, 2004Publication date: July 14, 2005Applicant: ABB Research Ltd.Inventors: Eduardo Gallestey, Alec Stothert
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Publication number: 20040117045Abstract: In a method and a computer program product for designing a component for an industrial plant, in particular a thick-walled component for a power plant, by means of an iteration, in which the steps ofType: ApplicationFiled: November 26, 2003Publication date: June 17, 2004Applicant: ABB Research LtdInventors: Geir Hovland, Eduardo Alvarez Gallestey, Alec Stothert, Steve Morton, Marc Antoine
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Publication number: 20030100974Abstract: In a method and computer program product for optimal operation of a power plant and a power plant optimising system an optimisation module (1) minimises a cost function (J[u],J[P]) that comprises a deviation of lifetime of plant components (LTp(&tgr;)) from a desired nominal lifetime trajectory (LTn(&tgr;)). This is done by, at a given time, determining future values of input values (u(&tgr;),P(&tgr;)) such as control values (P(&tgr;)) or process values (u(&tgr;)) to the plant and simulating, in a simulation module (2), the behaviour of the plant up to a given future time. Corresponding lifetime values are determined in the simulation, and incorporated in an objective function. The optimisation module (1) minimises the cost function (J[u],J[P]) by varying the input values (u(&tgr;),P(&tgr;)). As a result, it is possible to operate the plant such that component lifetime (LTp(&tgr;)) follows the desired trajectory (LTn(&tgr;)).Type: ApplicationFiled: November 19, 2002Publication date: May 29, 2003Inventors: Eduardo Gallestey Alvarez, Alec Stothert, Marc Antoine, Steve Morton
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Publication number: 20020120352Abstract: In a method and computer program product for optimizing power plant control values and a power plant optimizing system an optimization module (1) minimizes total plant operation costs while achieving predetermined required output values for produced power and process steam. This is done by, at a given time, determining future values of control values and simulating, in a simulation module (2), the behavior of the plant up to a given future time. Corresponding fuel costs and generated power are determined in the simulation, and incorporated in an objective function. The optimization module (1) minimizes the objective function by varying the control values. According to the invention, a rate of ageing of plant components is determined when simulating the future behavior of the plant, and the objective function to be minimized comprises said rate of ageing.Type: ApplicationFiled: December 19, 2001Publication date: August 29, 2002Inventors: Alec Stothert, Eduardo Gallestey Alvarez, Markus Ahrens, Marc Antoine, Steve Morton