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Representing causality and reasoning about controllability of multi-level flow-systems

Kai Heussen, Morten Lind
2010 2010 IEEE International Conference on Systems, Man and Cybernetics  
This paper explains modeling of controlled processes with multilevelflow models and proposes a new framework for modeling causal influence in multilevel flow models on the basis of a flow/potential analogy  ...  Safe operation of complex processes requires that operators maintain situational-awareness even in highly automated environments.  ...  ACKNOWLEDGMENT The work presented in this paper is a result of the research project Coherent Energy and Environmental System Analysis (CEESA), partly financed by The Danish Council for Strategic Research  ... 
doi:10.1109/icsmc.2010.5642272 dblp:conf/smc/HeussenL10 fatcat:zwzrxgcj2jeivm6t4ray2ocbwq

Understanding control function and failure from a process perspective

Kai Heussen, Morten Lind
2012 2012 Complexity in Engineering (COMPENG). Proceedings  
This paper presents a formal methodology for the qualitative representation of control functions in relation to their process context.  ...  In control design, fault-identification and fault tolerant control, the controlled process is usually perceived as a dynamical process, captured in a mathematical model.  ...  ACKNOWLEDGMENT The authors would like to thank Roberto Galeazzi for good discussions and opening a new alley of collaboration.  ... 
doi:10.1109/compeng.2012.6242946 dblp:conf/compeng/HeussenL12 fatcat:q6yfchyi4rfnhalkxjsd6uhwlu

Reasoning about Control Situations in Power Systems

A. Saleem, M. Lind
2009 2009 15th International Conference on Intelligent System Applications to Power Systems  
These general modeling requirements are well understood, but it is, in general, difficult to translate them into a model because of the lack of explicit principles for model construction.  ...  Introduction of distributed generation, deregulation and distribution of control has brought new challenges for electric power system operation, control and automation.  ...  It is shown that Multilevel Flow Modeling can provide model based support to explicit means-ends reasoning and handling of views.  ... 
doi:10.1109/isap.2009.5352845 fatcat:rupithtvanaw5lzvbkkbcky77u

FUNCTIONAL MODELLING FOR FAULT DIAGNOSIS AND ITS APPLICATION FOR NPP

MORTEN LIND, XINXIN ZHANG
2014 Nuclear Engineering and Technology  
Multilevel flow modelling (MFM), which is a method for functional modelling, is introduced briefly and illustrated with a cooling system example.  ...  The diagnosis task is analyzed and it is demonstrated that the levels of abstraction in models for diagnosis must reflect plant knowledge about goals and functions which is represented in functional modelling  ...  This is a key feature of Multilevel Flow Modelling.  ... 
doi:10.5516/net.04.2014.721 fatcat:3dtc2rlorzgthbdbcxfv623eou

Foundational Issues for Work Domain Analysis

Gavan Lintern
2006 Proceedings of the Human Factors and Ergonomics Society Annual Meeting  
The processes and guidelines offered by Lind (1994 Lind ( , 1999 for Multilevel Flow Modeling are no more explicit or extensive.  ...  Response, part c: From my reading of Lind's papers, I understand that analysis of processes within a control system is the role he has set for Multilevel Flow Modeling.  ... 
doi:10.1177/154193120605000347 fatcat:d6zzlfcduncbzl5exsxvvavn2e

Control architecture of power systems: Modeling of purpose and function

Kai Heussen, Arshad Saleem, Morten Lind
2009 2009 IEEE Power & Energy Society General Meeting  
A particular strength of the modeling tool used here, called Multilevel Flow Modeling (MFM), is that it provides a meaningful representation of control functions.  ...  A representation of control hierarchy in power systems from the literature (adapted from [28] , Fig. 1.4) . The most high-level view of the multilevel flow model is shown in Figure 6 .  ...  His research interests include automation design, supervisory control of complex industrial systems and infrastructures, and application of agent technology and knowledge based system in automation.  ... 
doi:10.1109/pes.2009.5275963 fatcat:v7ssmugupfbghe2d4sa2te766q

Enhancing Sustainability of Complex Epidemiological Models through a Generic Multilevel Agent-based Approach

Sébastien Picault, Yu-Lin Huang, Vianney Sicard, Pauline Ezanno
2017 Proceedings of the Twenty-Sixth International Joint Conference on Artificial Intelligence  
assessing control measures, as in epidemiology.  ...  Especially, multilevel multi-agent systems, deeply rooted in that culture, provide a generic way to integrate several epidemiological modeling paradigms within a homogeneous interface.  ...  The research work presented here is also funded by the Animal Health Division of the French National Institute for Agricultural Research (INRA).  ... 
doi:10.24963/ijcai.2017/53 dblp:conf/ijcai/PicaultHSE17 fatcat:gl46756v7nhrjhndjtwqi6w7ue

Representing Operational Modes for Situation Awareness

Denis Kirchhübel, Morten Lind, Ole Ravn
2017 Journal of Physics, Conference Series  
In this paper a consistent representation of possible configurations is deduced from the analysis of an exemplary start-up procedure by functional models.  ...  The alarm systems meant to support human operators in the diagnosis of the plant-wide situation on the other hand fail regularly in situations where these interactions of systems lead to many related alarms  ...  For the sake of readability the explicit modelling of the intention of control has been left out of the interpreted model for filling shown infigure 11.  ... 
doi:10.1088/1742-6596/783/1/012055 fatcat:vktb6nrmdrcl5btppzbpsmiv7u

Multilevel Simulation of Physical and Engineering Problems

2019 VOLUME-8 ISSUE-10, AUGUST 2019, REGULAR ISSUE  
Provisions of the developed approach to multilevel computer simulation of physical and engineering problems in the frames of multilevel component circuits formalism are described.  ...  This article discusses peculiar features of simulation of physical and engineering problems, criteria for their efficient simulation in development environment are formulated.  ...  ACKNOWLEDGMENTS This work was supported by the Ministry of Education and Science of the Russian Federation in the frames of Investigations and developments in the prioritized fields of R&D complex of Russia  ... 
doi:10.35940/ijitee.l3787.1081219 fatcat:j3d2dqttojfipoopc45d6r5q2y

An Advanced STATCOM Model for Optimal Power Flows Using Newton's Method

Behzad Kazemtabrizi, Enrique Acha
2014 IEEE Transactions on Power Systems  
The new model makes provisions for the explicit representation of the converter's internal ohmic and switching losses which in the context of an OPF formulation, yields an optimum operating point at which  ...  The STATCOM model possesses unparalleled control capabilities in the operational parameters of both the AC and DC sides of the converter.  ...  The explicit Jacobian and Hessian terms associated with the active power flow control constraint in the STATCOM model are given in Appendix B. D.  ... 
doi:10.1109/tpwrs.2013.2287914 fatcat:uymrnumgsvb4jdejpmenqyqwty

An advanced STATCOM model for optimal power flows using Newton's method

Behzad Kazemtabrizi, Enrique Acha
2015 2015 IEEE Power & Energy Society General Meeting  
The new model makes provisions for the explicit representation of the converter's internal ohmic and switching losses which in the context of an OPF formulation, yields an optimum operating point at which  ...  The STATCOM model possesses unparalleled control capabilities in the operational parameters of both the AC and DC sides of the converter.  ...  The explicit Jacobian and Hessian terms associated with the active power flow control constraint in the STATCOM model are given in Appendix B. D.  ... 
doi:10.1109/pesgm.2015.7285863 fatcat:zwffrxee2janngl7ijrcfy23k4

Occupational health and safety division of responsibility: A conceptual model for the implementation of the OHSAS 18001:2007 standard

Corina Dufour, Anca Draghci, Larisa Ivascu, Muddassar Sarfraz, Anca Draghici
2020 Human Systems Management  
The application of the proposed OHS Responsibility Multilevel Model to the OHSAS 18001:2007 supports the interest that research literature has had for the role of top management in OHS.  ...  distinct actions.  ...  The Appendices are available in the electronic version of this article: https://dx.doi.org/10.3233/ HSM-201060.  ... 
doi:10.3233/hsm-201060 fatcat:wvijkkadlfdyxmdwx3zoqghmwa

A new cognitive-based massive alarm management system in electrical power administration

O. Aizpurua, R. Galan, A. Jimenez
2008 2008 7th International Caribbean Conference on Devices, Circuits and Systems  
Here, the integration is developed using the ontology of each system domains, i.e., the ontology corresponding to the alarms, controls, events, energy flow and trigger sequence.  ...  This paper presents a methodology that integrates several available techniques to manage the massive amount of alarm signals in electrical power dispatch control centres, as well as the contribution of  ...  The multilevel flow modelling is a functional modelling technique. It models diagrammatically a system from the new point of the means-end dimension.  ... 
doi:10.1109/iccdcs.2008.4542607 fatcat:tcp3nto3zjhrfgzwmp4id5wg7a

A probabilistic cognitive simulator for HRA studies (PROCOS)

P. Trucco, M.C. Leva
2007 Reliability Engineering & System Safety  
The paper deals with the development of a simulator for approaching human errors in complex operational frameworks (e.g., plant commissioning).  ...  The aim is to integrate the quantification capabilities of the so-called 'first-generation' human reliability assessment (HRA) methods with a cognitive evaluation of the operator.  ...  Acknowledgements The authors would like to thank Elisa De Grandis for her precious support, Gianmario Gallarati and Giovanni Corti for the effort they put in contributing to develop the simulator during  ... 
doi:10.1016/j.ress.2006.06.003 fatcat:te7wmzksqbekrldcncunmobrd4

Clairvoyant: a synthesis system for production-based specification

A. Seawright, F. Brewer
1994 IEEE Transactions on Very Large Scale Integration (vlsi) Systems  
Advantages of this form of specification are that the designer does not describe the control flow in terms of explicit states or control variables and that the designer does not describe a particular form  ...  The control is implicitly described via the production hierarchy, while the data-flow is described as action computations.  ...  The modeling of actions in PBS is that of arbitrary high level data-flow behaviors instead of output signal transitions and PBS targets multilevel logic models for the control.  ... 
doi:10.1109/92.285744 fatcat:x7jhqq5r7jg4pic2yt3li54sfa
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