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A qualitative modeling facility for intelligent supervisory control systems (ISCSs) Cifuentes, Edgardo Ivan
Abstract
Control strategies based on purely mathematical algorithms have only limited ability to cope with the type of operating conditions found in full-scale industrial applications. One approach to overcome this limitation integrates elements of automatic control theory, artificial intelligence and operations research into the design of a control system. This approach is employed in this research study to design an intelligent supervisory control system (ISCS). Elements of artificial intelligence to provide “human-like” characteristics for the ISCS are central to this research. Pseudo-Qualitative Modeling as a central component of an ISCS is proposed in this research. This approach provides the mechanisms required by the ISCS to handle heuristic knowledge and approximate reasoning required in many supervisory control applications. A simulation study has been performed to demonstrate the validity of this approach. Simulation results have shown that this technique can handle either poorly-defined heuristic models or accurate models based on mathematical concepts. In fact, pseudo-qualitative modeling provides a framework to integrate qualitative and numerical models into a knowledge-based system. A prototype of an ISCS was implemented using ProcessVision, a real-time SCADA (Supervisory Control And Data Acquisition) software package. This prototype system was applied to the C-line grinding circuit at Highland Valley Copper (HVC) to monitor and detect tonnage restrictions that affect circuit production. The diagnosis of tonnage restriction is currently performed manually by metallurgists on a weekly basis. This method is a heuristic procedure based on highly subjective judgment. The diagnosis results provided by the ISCS prototype during the evaluation period were well within the range of those reported by HVC metallurgists. Implementation of this ISCS prototype has demonstrated the feasibility of incorporating qualitative modeling into a commercial real-time SCADA system widely used in industrial applications.
Item Metadata
Title |
A qualitative modeling facility for intelligent supervisory control systems (ISCSs)
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
1995
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Description |
Control strategies based on purely mathematical algorithms have only limited ability to cope with the
type of operating conditions found in full-scale industrial applications. One approach to overcome
this limitation integrates elements of automatic control theory, artificial intelligence and operations
research into the design of a control system. This approach is employed in this research study to
design an intelligent supervisory control system (ISCS). Elements of artificial intelligence to provide
“human-like” characteristics for the ISCS are central to this research.
Pseudo-Qualitative Modeling as a central component of an ISCS is proposed in this research. This
approach provides the mechanisms required by the ISCS to handle heuristic knowledge and
approximate reasoning required in many supervisory control applications. A simulation study has
been performed to demonstrate the validity of this approach. Simulation results have shown that this
technique can handle either poorly-defined heuristic models or accurate models based on
mathematical concepts. In fact, pseudo-qualitative modeling provides a framework to integrate
qualitative and numerical models into a knowledge-based system.
A prototype of an ISCS was implemented using ProcessVision, a real-time SCADA (Supervisory
Control And Data Acquisition) software package. This prototype system was applied to the C-line
grinding circuit at Highland Valley Copper (HVC) to monitor and detect tonnage restrictions that
affect circuit production. The diagnosis of tonnage restriction is currently performed manually by
metallurgists on a weekly basis. This method is a heuristic procedure based on highly subjective
judgment. The diagnosis results provided by the ISCS prototype during the evaluation period were
well within the range of those reported by HVC metallurgists. Implementation of this ISCS
prototype has demonstrated the feasibility of incorporating qualitative modeling into a commercial
real-time SCADA system widely used in industrial applications.
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Extent |
4461478 bytes
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Genre | |
Type | |
File Format |
application/pdf
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Language |
eng
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Date Available |
2009-04-16
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Provider |
Vancouver : University of British Columbia Library
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Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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DOI |
10.14288/1.0088312
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Graduation Date |
1995-11
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.