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The course deals with modelling, simulation and optimization of discrete event systems. These systems do not change continuously but only at occurrence of discrete events important from the system behaviour point of view. These are mainly batch and piece productions and logistics, transport and service systems. Witness simulation system is used to model these systems and to carry out simulation and optimization experiments. Special attention is paid to modelling random phenomena such as breakdowns and unplanned repairs. The course is oriented practically but gives a sufficient theoretical ground based on queueing theory, Petri nets and discrete optimization.
Last update: TAJ445 (14.12.2013)
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R: Leemis L.M., Park S.K.: Discrete-Event Simulation: A First Course. Pearson Prentice Hall, 2006, 0-13-142917-5 A: Peterson J.L.: Petri Net Theory and the Modeling of Systems. Prentice-Hall, Englewood Cliffs 1981, 0-13-661983-5 R: Robinson S.: Successful Simulation. McGraw-Hill, London, 1994, 0-07-707622-2 Last update: Hanta Vladimír (01.07.2013)
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Analýza vybraných modelových procesů. Tvorba simulačního modelu, jeho validace a verifikace. Simulační experimenty, optimalizace procesu. Řešení vzorových projektů pod vedením. Samostatná práce na individuálních projektech. Last update: Hanta Vladimír (13.11.2012)
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1. Basic principles of modelling and simulation. Continuous vs. discrete models. Deterministic and stochastic models. Comparison of principles of mathematical modelling, interactive modelling in graphical interface and experimentation on real systems. 2. Interactive graphical modelling and simulation and their computer support, overview of programs for discrete event systems simulation. 3. Graphical interface of Witness simulation system. Interactive control of models and working with simulation elements. Simulation projects, development of simulation models. 4. Three stages of model development (definition, detail, display). Basic simulation elements: parts, machines and buffers. Library of simulation elements. Naive simulation of a simple system. 5. Modelling of material flows though a system, input and output rules. Modelling resources, labour, work interruption and labour pre-empting. Shift modelling. Use of main shifts and sub-shifts. 6. Actions, immediate actions, user actions. Parts attributes. Universal and user attributes. Variables and system variables. Functions. Library of designer elements, submodels and modules. Interactive visual definition of rules. 7. Ways of input and output data presentation. Interconnection with other programs (Excel, etc.). Graphical representation of models. Icons and picture gallery, icon editor. 8. Modelling of stoppages. Breakdowns and set-ups. Detailing machines and parts" working routines, multi-cycle machines. Modelling of transportation systems: conveyors, tracks, vehicles and paths. routing. Vehicle loading and unloading. Allocation of vehicles. 9. Continuous simulation elements. Processors, tanks, fluids and pipes. Cooperation of continuous and discrete elements. Filling and emptying of packaging. 10. Discrete event systems, queueing theory, Kendall classification of systems, models of queue and random processes, single- and multiple-servers queue systems. 11. Petri nets. Basic concepts and definition. Types of Petri nets, their properties. Model and analysis of Petri nets. 12. Simulation experiments. Use of optimization module. Principles of discrete optimization methods. Simulated annealing, taboo search. Computational complexity. Combinatorial algorithms, NP-complete problems. 13. Simulation projects. Aims, scope and details of projects. Data collection. Development and testing of models: model structure, interactive creation of models. Model verification and validation. 14. Documentation, use of Documentor module. Presentation and implementation of simulation project results. Last update: Hanta Vladimír (22.06.2009)
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http://moodle.vscht.cz/course/view.php?id=113 Introduction to the use of Witness. http://moodle.vscht.cz/mod/resource/view.php?id=2614 Videcká Z.: Witness 2000. User's Guide. VUT, Brno 2001 http://moodle.vscht.cz/mod/resource/view.php?id=2615 Learning Witness. Educational Manual. http://moodle.vscht.cz/mod/resource/view.php?id=2616 Witness Getting Started Materials. http://moodle.vscht.cz/mod/resource/view.php?id=2769 Last update: Hanta Vladimír (01.07.2013)
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Students will be able to:
Last update: Hanta Vladimír (26.06.2013)
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Applications of Computer Science, Algorithms and Programming Last update: Hanta Vladimír (26.06.2013)
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Teaching methods | ||||
Activity | Credits | Hours | ||
Účast na přednáškách | 0.5 | 14 | ||
Práce na individuálním projektu | 2 | 56 | ||
Účast na seminářích | 1.5 | 42 | ||
4 / 4 | 112 / 112 |
Coursework assessment | |
Form | Significance |
Regular attendance | 25 |
Report from individual projects | 35 |
Continuous assessment of study performance and course -credit tests | 40 |