APPLY FUNCTIONAL MODELING TO CONSEQUENCE ANALYSIS IN SUPERVISION SYSTEMS Present by Xinxin Zhang 1...
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Transcript of APPLY FUNCTIONAL MODELING TO CONSEQUENCE ANALYSIS IN SUPERVISION SYSTEMS Present by Xinxin Zhang 1...
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APPLY FUNCTIONAL MODELING TO CONSEQUENCE ANALYSIS IN SUPERVISION SYSTEMS
Present by Xinxin Zhang1
Morten Lind1, Giulio Gola2, and Ole Ravn1
1 Technical University of DenmarkAutomation and Control
2 Institute for Energy TechnologyOECD Halden Reactor Project
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AGENDA
• Introduction• Consequence analysis and functional
modeling• Multilevel Flow Modeling (MFM)• Rule-based tool development • Implementation challenges• Conclusion
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INTRODUCTION
• PHD project Funded together by DTU and IFE
• PeriodMarch 2012 to March 2015
• SubjectConsequence Reasoning in MFM and Its Application
in Operation Supportive Systems
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CONSEQUENCE ANALYSIS
• Scope:
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FUNCTIONAL MODELLING
• What – Definition
• Why – Justification • Means-end concept• Goal-function representation of the process
• How – Methodology
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MULTILEVEL FLOW MODELING
• MFM Concepts and MFM models
• Means-end and whole-part decomposition
• State dependency relations are generic• Means-end relations• Means-end patterns• MFM patterns• Potential path of event propagation,
temporal information
• Domain: NPP, etc. [refs]
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MFM REASONING
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RULE-BASED SYSTEM• Components of a typical rule-base system:
– A user interface or other connection to the outside world through which the knowledge of the system is collected and the input and output signal can be sent.
– A knowledge base that stores the system information and conditions.
– A rule base contains a set of rules, which is a specific type of knowledge base.
– An inference engine or semantic reasoner, which infers information or takes action based on the interaction of knowledge base and the rule base.
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RULE-BASED SYSTEM
Fig2. Reasoning System Architecture for Consequence Analysis
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RULE-BASED SYSTEM
• Database:• Static – Functional Model (process knowledge)• Dynamic – Observations and Inferences
• Rule-base:• Reasoning rules
• Special Facility:• Reasoning Maintenance System (RMS)
• Interface:• Model Editor, Case Editor, etc.
Modelling methodology challenge
Integration structure challenge
Reasoning strategy challenge
Interpretation/Visualization challenge
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CHALLENGES
• Modelling challenge:• Represent operation modes, barriers, control structures, etc.• [Refs]
• Reasoning strategy challenge• Inference propagation and validation
• Integration challenge• Interface design with other operation support systems
• Data interpretation challenge• Structure-role-function mapping
• Visualization challenge• Knowledge representation and display
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INFERENCE PROPAGATION
• Identify propagation loops
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MULTIAGETN ARCHITECTURE
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CONCLUSION
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THANK YOU FOR YOUR ATTENTION!
PRESENTED BY XINXIN [email protected] Technical University of DenmarkAutomation and Control