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A system and method for adaptively designing self-tuning controllers, specifically PID controllers for process control systems. The method is based on a model-parameter interpolation, according to which a candidate process model is defined by a predetermined, limited set of models. Each of the model

A system and method for adaptively designing self-tuning controllers, specifically PID controllers for process control systems. The method is based on a model-parameter interpolation, according to which a candidate process model is defined by a predetermined, limited set of models. Each of the models is characterized by a plurality of parameters, and, for each model, each of the parameters has a respective value that is selected from a set of predetermined initialization values corresponding to the parameter. Evaluation of each of the models includes computation of a model squared error and computation of a Norm that is derived from the model square errors calculated for the models. The Norm value is assigned to every parameter value represented in the model that is represented in an evaluation scan. As repeated evaluations of models are conducted, an accumulated Norm is calculated for each parameter value. The accumulated Norm is the sum of all Norms that have been assigned to the parameter value in the course of model evaluations. Subsequently, an adaptive parameter value is calculated for each parameter. The adaptive parameter value is a weighted average of the initialization values assigned to the respect parameters. The set of adaptive process parameter values are then used to redesign a process controller.

대표청구항 ▼

A system and method for adaptively designing self-tuning controllers, specifically PID controllers for process control systems. The method is based on a model-parameter interpolation, according to which a candidate process model is defined by a predetermined, limited set of models. Each of the model

A system and method for adaptively designing self-tuning controllers, specifically PID controllers for process control systems. The method is based on a model-parameter interpolation, according to which a candidate process model is defined by a predetermined, limited set of models. Each of the models is characterized by a plurality of parameters, and, for each model, each of the parameters has a respective value that is selected from a set of predetermined initialization values corresponding to the parameter. Evaluation of each of the models includes computation of a model squared error and computation of a Norm that is derived from the model square errors calculated for the models. The Norm value is assigned to every parameter value represented in the model that is represented in an evaluation scan. As repeated evaluations of models are conducted, an accumulated Norm is calculated for each parameter value. The accumulated Norm is the sum of all Norms that have been assigned to the parameter value in the course of model evaluations. Subsequently, an adaptive parameter value is calculated for each parameter. The adaptive parameter value is a weighted average of the initialization values assigned to the respect parameters. The set of adaptive process parameter values are then used to redesign a process controller. which connects to a second network for bidirectional exchange of digital data; a control program stored accessibly to and executable on said controller, said control program when executing effective in setting operational parameters for the scanner and the printer and enabling a user to select delivery of the digital record to a selected one of said printer interface, said first network interface, and said second network interface; and a memory coupled to and housed with said controller; said control program when executing on said controller further enabling a user to store a database of address information in said memory and enabling access to said database of address information stored in said memory. 5. Apparatus according to claim 4 wherein said control program when executing on said controller further enabling a user to selectively access one of said database of address information stored in said memory and a second database of address information stored remotely from said controller and accessible through said first network interface. 6. Apparatus comprising: a scanner interface coupling at least one scanner and generating a digital record of a scanned image; a printer interface coupling at least one printer and generating printed copy signals corresponding to the digital record, the printed copy signals being effective in printing at the printer an image derived from the scanned image; a controller which couples said scanner interface and said printer interface, said controller having a first network interface which connects to an area network for bidirectional exchange of digital data; and a second network interface which connects to a second network for bidirectional exchange of digital data; a control program stored accessibly to and executable on said controller, said control program when executing effective in setting operational parameters for the scanner and the printer and enabling a user to select delivery of the digital record to any selected two of said printer interface, said first network interface, and said second network interface; and a memory coupled to and housed with said controller; said control program when executing on said controller further enabling a user to store a database of address information in said memory and enabling access to said database of address information stored in said memory. 7. Apparatus according to claim 6 wherein said control program when executing on said controller further enabling a user to selectively access one of said database of address information stored in said memory and a second database of address information stored remotely from said controller and accessible through said first network interface. 8. Apparatus comprising: a scanner interface coupling at least one scanner and generating a digital record of a scanned image; a printer interface coupling at least one printer and generating printed copy signals corresponding to the digital record, the printed copy signals being effective in printing at the printer an image derived from the scanned image; a controller which couples said scanner interface and said printer interface, said controller having a first network interface which connects to an area network for bidirectional exchange of digital data; and a second network interface which connects to a second network for bidirectional exchange of digital data; a control program stored accessibly to and executable on said controller, said control program when executing effective in setting operational parameters for the scanner and the printer and enabling a user to select delivery of the digital record each and all of said printer interface, said first network interface, and said second network interface; and a memory coupled to and housed with said controller; said control program when executing on said controller further enabling a user to store a database of address information in said memory and enabling access to said database of address information stored in said memory. 9. Apparatus according to claim 8 wherein said control program when executing on said controller further enabling a user to selectively access one of said database of address information stored in said memory and a second database of address information stored remotely from said controller and accessible through said first network interface. 10. Apparatus comprising: an image capture device which generates a digital record; a printer which generates a printed copy derived from the digital record; a controller which couples said image capture device and said printer, said controller having a first network interface which connects to an area network for bidirectional exchange of digital data; and a second network interface which connects to a second network for exchange of digital data; and a control program stored accessibly to and executable on said controller, said control program when executing effective in setting operational parameters for the image capture device and the printer and enabling a user to select delivery of the digital record to a selected one of said printer, said first network interface to generate an electronic mail message, and said second network interface to generate a facsimile transmission to a remote facsimile receiver; wherein said printer is remote to said controller and is coupled to said controller via said first network interface. 11. Apparatus according to claim 10 wherein said control program when executing on said controller enables a user to access a remotely stored database of address information. 12. Apparatus according to claim 10 further comprising: a memory coupled to and housed with said controller; said control program when executing on said controller further enabling a user to store a database of address information in said memory and enabling access to said database of address information stored in said memory. 13. Apparatus according to claim 10 further comprising a memory coupled to and housed with said controller; said control program when executing on said controller further enabling a user to store a database of address information in said memory and to selectively access one of said database of address information stored in said memory and a second database of address information stored remotely from said controller and accessible through said first network interface. 14. Apparatus comprising: an image capture device which generates a digital record; a printer which generates a printed copy derived from the digital record; a controller which couples said image capture device and said printer, said controller having a first network interface which connects to an area network for bidirectional exchange of digital data; and a second network interface which connects to a second network for exchange of digital data; and a control program stored accessibly to and executable on said controller, said control program when executing effective in setting operational parameters for the image capture device and the printer and enabling a user to select delivery of the digital record to any selected two of said printer, said first network interface to generate an electronic mail message, and said second network interface to generate a facsimile transmission to a remote facsimile receiver; wherein said printer is remote to said controller and is coupled to said controller via said first network interface. 15. Apparatus according to claim 14 wherein said control program when executing on said controller enables a user to access a remotely stored database of address information. 16. Apparatus according to claim 14 further comprising: a memory coupled to and housed with said controller; said control program when executing on said controller further enabling a user to store a database of address information in said memory and enabling access to said database of address information stored in said memory.