@inproceedings{18138, abstract = {{Modern companies are nowadays confronted with an increasing demand of multiple products, where they need to perform more flexible every day. Cost-intensive decisions are to be confirmed in short times, in order to minimize risks and secure efficient production programs as well as material flows. Tools for this digital planning via simulation methods are one well established possibility to receive decision support. Nevertheless, the creation of the necessary simulation models is a complicated and error-prone process, where complexity of modeling, validation and verification depends on the used tool and its functionalities. This paper presents implemented concepts for an innovative user support in his tasks of verification and validation of simulation models during the execution of a simulation run. Time-intensive procedures like stopping simulation, parameterization and restarting within the problem analysis are simplified. So the user is able to focus on the real problem solving task.}}, author = {{Laroque, Christoph and Fischer, Matthias and Dangelmaier, Wilhelm}}, booktitle = {{European Simulation and Modelling Conference (ESM 2009)}}, publisher = {{EUROSIS-ETI}}, title = {{{Concepts for Model Verification and Validation during Simulation Runtime}}}, year = {{2009}}, } @inbook{18291, author = {{Suess, Tim and Fischer, Matthias and Huber, Daniel and Laroque, Christoph and Dangelmaier, Wilhelm}}, booktitle = {{Augmented & Virtual Reality in der Produktentstehung}}, pages = {{111----126}}, publisher = {{Verlagsschriftenreihe des Heinz Nixdorf Instituts, Paderborn}}, title = {{{Ein System zur aggregierten Visualisierung verteilter Materialflusssimulationen}}}, volume = {{252}}, year = {{2009}}, } @inbook{22941, author = {{Dumitrescu, Roman and Gausemeier, Jürgen and Dangelmaier, Wilhelm and Klöpper, Benjamin}}, booktitle = {{Self-x in Engineering}}, editor = {{Klöpper, Benjamin and Dangelmaier, Wilhelm}}, publisher = {{MV Verlag}}, title = {{{Solution Patterns for the Development of Self-Optimizing Systems}}}, year = {{2009}}, } @inproceedings{17416, abstract = {{In this paper we present a system for the simultaneous visualization of several parallel executed simulation replications. By aggregating the scenes of multiple similar simulations into one single scene it is possible to make a visual statistical analysis of a set of discrete event simulations as well as to easily compare different system parameterizations. The aim of our system is to enhance the model analysis, verification and validation process in terms of speed and ease. The parallel execution of several simulations of complex models and the visualization of these cannot be done on one computer, thus a parallel approach is necessary. Our system uses a thin-client and multiple processors on a PC-cluster. The rendering and the simulation execution are done on processors of the cluster. The client is used only for the visualization of the images transmitted by the cluster and for user interaction. }}, author = {{Suess, Tim and Huber, Daniel and Fischer, Matthias and Laroque, Christoph and Dangelmaier, Wilhelm}}, booktitle = {{IEEE International Symposium on Parallel and Distributed Processing with Applications}}, isbn = {{9780769534718}}, title = {{{A System for Aggregated Visualization of Multiple Parallel Discrete Event Simulations}}}, doi = {{10.1109/ispa.2008.30}}, year = {{2008}}, } @inproceedings{17868, abstract = {{The paper describes an approach for an aggregated animation of a simulation experiment in an interactive 3D environment, visualizing multiple, distributed simulation runs. Although the general approach of a 3-dimensional visualization of material flow simulation helps to understand the dynamic behavior of a system better as well as faster, it remains unclear, how typical the animated simulation represents the model, if there is a stochastic influence for even some parameters. By the integrated visualization of multiple distributed simulation runs, this uncertainty can be solved, which will be shown in this paper for a typical simulation study of a queuing system. }}, author = {{Dangelmaier, Wilhelm and Fischer, Matthias and Huber, Daniel and Laroque, Christoph and Suess, Tim}}, booktitle = {{2008 Winter Simulation Conference}}, isbn = {{9781424427079}}, pages = {{2012--2020}}, title = {{{Aggregated 3D-visualization of a distributed simulation experiment of a queuing system}}}, doi = {{10.1109/wsc.2008.4736296}}, year = {{2008}}, } @inproceedings{18139, abstract = {{This paper describes a method for the animation of a large number of objects within a dynamic 3D visualization of a material flow simulation model. It uses key-frame based animation. The number of animated objects may grow constantly in complex simulation models, which might lead to an amount of animations that is too big to be computed in real-time. By the use of a dynamic adjustment, the presented algorithm prefers important animations. Less relevant animations are updated rarely, whereby the selection itself is taken by multiple indicators, e.g. the visible size of the animated object on the screen, in order to keep a good optical impression. Dependent on the computing power of the computer, the algorithm controls the animations in such a way, that the fluid visualization of a large number of objects is still possible. Though the algorithm is to be used within a material flow simulator, it is moreover implemented in a specific animation editor, which allows the design and control of animation schemes. It supports the use of grouping to allow the creation of hierarchical structures for complex animations in a fast and easy manner. The evaluation of the algorithm is proven by a test scene, consisting of tens of thousands animated objects. }}, author = {{Laroque, Christoph and Fischer, Matthias and Dangelmaier, Wilhelm and Eikel, Benjamin}}, booktitle = {{Industrial Simulation Conference (ISC 2008)}}, pages = {{306--310}}, publisher = {{EUROSIS-ETI}}, title = {{{Dynamic Control of Animation Schemes for the Efficient 3D-Visualization of Material Flow Simulations}}}, year = {{2008}}, } @inproceedings{18347, abstract = {{The validation of material flow models as well as the selection of promising strategies for the generation of a successful experiment plan is a time-consuming process. A new approach is presented, which supports the simulation expert in his working process by giving him the opportunity to modify the simulated simulation run and afterwards compare the effects of his modification with the original setting, online and in one user interface, implemented by switching the visualizations between the simulation runs or opening up to 5 parallel 3D windows. The method developed therefore clones existing simulation runs online and allows the navigation within these existing simulation runs. The method has been implemented and is validated by a test model, which describes in detail the new working process of a modeler. New research questions are derived from this work, which will define following working steps. }}, author = {{Fischer, Matthias and Laroque, Christoph and Huber, Daniel and Krokowski, Jens and Mueck, Bengt and Kortenjan, Michael and Aufenanger, Mark and Dangelmaier, Wilhelm}}, booktitle = {{European Simulation and Modelling Conference (ESM 2007)}}, pages = {{499----505}}, title = {{{Interactive Refinement of a Material Flow Simulation Model by Comparing Multiple Simulation Runs in one 3D Environment}}}, year = {{2007}}, } @inproceedings{18349, author = {{Dangelmaier, Wilhelm and Laroque, Christoph and Fischer, Matthias}}, booktitle = {{Augmented & Virtual Reality in der Produktentstehung}}, pages = {{95--110}}, publisher = {{Verlagsschriftenreihe des Heinz Nixdorf Instituts, Paderborn}}, title = {{{Ein ganzheitlicher Ansatz zur immersiven 3D-Materialflusssimulation innerhalb der Digitalen Fabrik}}}, volume = {{209}}, year = {{2007}}, } @inproceedings{22331, author = {{Gausemeier, Jürgen and Dangelmaier, Wilhelm and Zimmer, Detmar and Schmidt, Alexander and Frank, Ursula and Klöpper, Benjamin}}, booktitle = {{Computers and Information in Engineering Conference, Parts A and B}}, isbn = {{0-7918-3806-4}}, pages = {{935--944}}, publisher = {{American Society of Mechanical Engineers}}, title = {{{Using Active Patterns for the Conceptual Design of Self-Optimizing Systems Exemplified by an Air Gap Adjustment System}}}, doi = {{10.1115/DETC2007-34642}}, volume = {{27}}, year = {{2007}}, } @proceedings{17417, abstract = {{We present a parallel algorithm for the rendering of complex three-dimensional scenes. The algorithm runs across heterogeneous architectures of PC-clusters consisting of a visualization-node, equipped with a powerful graphics adapter, and cluster nodes requiring weaker graphics capabilities only. The visualization-node renders a mixture of scene objects and simplified meshes (Reliefboards). The cluster nodes assist the visualization-node by asynchronous computing of Reliefboards, which are used to replace and render distant parts of the scene. Our algorithm is capable of gaining significant speedups if the cluster's nodes provide weak graphics adapters only. We trade the number of cluster nodes off the scene objects' image quality.}}, editor = {{Rammig, Franz-Josef and Dangelmaier, Wilhelm and Karl, Holger and Mertsching, Bärbel and Meyer auf der Heide, Friedhelm and Trächtler, Ansgar}}, publisher = {{Verlagsschriftenreihe des Heinz Nixdorf Instituts}}, title = {{{Self-Coordinating Systems: The Next Challenge in Research on Distributed Systems}}}, year = {{2006}}, } @inproceedings{18351, abstract = {{In this paper the ideas of a new research project are presented. The material flow simu- lator d3FACT insight shall manage multiple parallel and time synchronous simulations to grand the power of real-time visualization in combination with statistical analysis. This research is issued to overcome the conflict of simulation run repetition for a good statistical basis and real-time immersive visualization. A side effect will be the reduc- tion of time needed for simulation experiments. The planned simulation tool has the feature of triggered cloning, i.e., the user can decide during runtime to clone a set of simulations after changing parameters to preserve the original system. The simulations will be aggregated by visualization and statistics. The rendering is planned to overlay several simulations using effects like inking and transparency. Simulation data will be aggregated with statistical functions and diagrams.}}, author = {{Dangelmaier, Wilhelm and Huber, Daniel and Laroque, Christoph and Aufenanger, Mark and Fischer, Matthias and Krokowski, Jens and Kortenjan, Michael}}, booktitle = {{Simulation and Visualization 2006 (SimViS)}}, pages = {{79--88}}, publisher = {{SCS European Publishing House}}, title = {{{d³FACT insight goes parallel - Aggregation of multiple simulations}}}, year = {{2006}}, } @inproceedings{23299, author = {{Rammig, Franz-Josef and Dangelmaier, Wilhelm and Karl, Holger and Mertsching, Bärbel and Meyer auf der Heide, Friedhelm and Trächtler, Ansgar}}, booktitle = {{New Trends in Parallel & Distributed Computing}}, pages = {{248 -- 259}}, publisher = {{Heinz Nixdorf Institut}}, title = {{{Self-Coordinating Systems: The Next Challenge in Research on Distributed Systems}}}, volume = {{181}}, year = {{2006}}, } @article{17414, abstract = {{Nowadays companies operate in a difficult environment: the dynamics of innovations increase and product life cycles become shorter. Furthermore products and the corresponding manufacturing processes get more and more complex. Therefore, companies need new methods for the planning of manufacturing systems. One promising approach in this context is digital factory/virtual production—the modeling and analysis of computer models of the planned factory with the objective to reduce time and costs. For the modeling and analysis various simulation methods and programs have been developed. They are a highly valuable support for planning and visualizing the manufacturing system. But there is one major disadvantage: only experienced and long trained experts are able to operate with these programs. The graphical user interface is very complex and not intuitive to use. This results in an extensive and error-prone modeling of complex simulation models and a time-consuming interpretation of the simulation results. To overcome these weak points, intuitive and understandable man–machine interfaces like augmented and virtual reality can be used. This paper describes the architecture of a system which uses the technologies of augmented and virtual reality to support the planning process of complex manufacturing systems. The proposed system assists the user in modeling, the validation of the simulation model, and the subsequent optimization of the production system. A general application of the VR- and AR-technologies and of the simulation is realized by the development of appropriate linking and integration mechanisms. For the visualization of the arising 3D-data within the VR- and AR-environments, a dedicated 3D-rendering library is used.}}, author = {{Dangelmaier, Wilhelm and Fischer, Matthias and Gausemeier, Jürgen and Grafe, Michael and Matysczok, Carsten and Mueck, Bengt}}, issn = {{0166-3615}}, journal = {{Computers in Industry}}, pages = {{371--383}}, title = {{{Virtual and augmented reality support for discrete manufacturing system simulation}}}, doi = {{10.1016/j.compind.2005.01.007}}, year = {{2005}}, } @inproceedings{18366, author = {{Dangelmaier, Wilhelm and Mueck, Bengt and Fischer, Matthias and Mahajan, Kiran and Laroque, Christoph}}, booktitle = {{Simulation in wider Europe - 19th European Conference on Modelling and Simulation ECMS 2005}}, pages = {{267--270}}, title = {{{Methods to lead the user to significant processes in a 3D material flow simulation}}}, year = {{2005}}, } @inproceedings{7940, author = {{Mahajan, Kiran and Laroque, Christoph and Dangelmaier, Wilhelm and Soltenborn, Christian and Kortenjan, Michael and Kuntze, Daniel}}, booktitle = {{Proceedings of the conference on Simulation and Visualization (SimViS 2005), Magedeburg (Germany)}}, pages = {{115--126}}, publisher = {{SCS European Publishing House}}, title = {{{d³FACT insight: A motion planning algorithm for material flow simulations in virtual environments}}}, volume = {{1}}, year = {{2005}}, } @inproceedings{18364, abstract = {{The visualisation of manufacturing-processes assists the user in understanding and analysis. Typically he can move free and unguided in a virtual environment which visualizes the entire process. Thus knowledge and conclusions are to some extend acquired on a random base. This article describes the development of a tool, which enables the user to interactively improve significant production processes in the simulation. He moves in a virtual 3D-environment (walkthrough system) and is able to acquire automatically calculated indications for significant processes. At the same time the simulation considers significant objects in a more detailed way. If the viewer is interested in a significant process, he is automatically guided to the relevant location where he can examine the critical situation by modification of the simulation model.}}, author = {{Mueck, Bengt and Dangelmaier, Wilhelm and Laroque, Christoph and Fischer, Matthias and Kortenjan, Michael}}, booktitle = {{Simulation and Visualisation 2004}}, pages = {{73--83}}, publisher = {{SCS European Publishing House}}, title = {{{Guidance of Users in Interactive 3D-Visualisations of Material Flow Simulations}}}, year = {{2004}}, } @inproceedings{17423, author = {{Mueck, Bengt and Dangelmaier, Wilhelm and Fischer, Matthias}}, booktitle = {{15th European Simulation Symposium (ESS 2003)}}, pages = {{367--371}}, publisher = {{SCS - Europe}}, title = {{{Components for the Active Support of the Analysis of Material Flow Simulations in a Virtual Environment}}}, year = {{2003}}, } @inproceedings{18372, abstract = {{Simulation und Visualisierung sind anerkannte Mittel zum Verstehen und Analysieren von Fertigungsprozessen. In Visualisierungen von Fertigungsprozessen können Betrachter frei und ungeleitet umherwandern. Erkenntnisse werden so aber eher zufällig erworben. Dieser Artikel skizziert ein System und Methoden, die den Betrachter unterstützen auf auffällige/signifikante Prozesse/ Punkte in Materialflusssimulationen aufmerksam zu werden und diese zu entschärfen. Es wird der Entwurf eines Werkzeugs beschrieben, dass den Betrachter einer Simulation die Möglichkeit bietet, signifikante Produktionsprozesse interaktiv zu verbessern. Der Benutzer wird sich in einer virtuellen 3D-Umgebung (Walkthrough-System) bewegen können und automatisch ermittelte Indizien für signifikante Abläufe erhalten. Zugleich soll die Simulation signifikante Objekte genauer simulieren. Bekundet der Benutzer Interesse an einem signifikanten Prozess, wird er automatisch zu dem jeweiligen Ort geführt werden und dort durch Eingriffe in die Simulation die kritische Situation experimentell untersuchen können. Da der kritische Moment in der Vergangenheit liegt und somit vom Betrachter schon verpasst ist, wird es dem Betrachter möglich sein, die Simulation auf einen Zeitpunkt vor dem Eintreten zurück zu setzen. Die virtuelle Szene (3D-Grafik-Modelle) einer typischen dynamischen Simulationsumgebung ist in der Regel zu komplex, um sie in Echtzeit in einem Walkthrough-System zu visualisieren und darzustellen. Typischerweise werden Approximationsverfahren eingesetzt, um die Komplexität zu reduzieren und ein flüssiges Navigieren des Betrachters zu erlauben. Durch spezifische Simulations-Anforderungen ist bekannt, an welchen Objekten des Simulationsmodells Probleme auftreten; sie sind für den Betrachter wichtig. Die zugehörigen virtuellen 3D-Repräsentanten, können von den Approximationsalgorithmen mit einer besonders hohen Darstellungsqualität dargestellt werden und die übrigen Teile der virtuellen Szene entsprechend vernachlässigt werden. Solche Approximationsalgorithmen und Datenstrukturen nutzen die spezifischen Eigenschaften virtueller Simulationsumgebungen aus, um eine hohe Darstellungsqualität und Darstellungsperformance zu erreichen. }}, author = {{Dangelmaier, Wilhelm and Franke, Werner and Mueck, Bengt and Fischer, Matthias}}, booktitle = {{2. Paderborner Workshop Augmented & Virtual Reality in der Produktentstehung}}, pages = {{141--151}}, title = {{{Komponenten zur aktiven Unterstützung der Analyse von Materialflusssimulationen in virtuellen Umgebungen}}}, volume = {{123}}, year = {{2003}}, } @inproceedings{18369, abstract = {{Visualising is a method used to help experiencing and understanding causal cohesions in simulation processes. For this purpose, tools for visualising are already implemented in prevalent simulation systems. The user creates his simulation model and generates a 3-dimensional (2,5-dimensional) visualising by means of the simulation system. This helps examining the process which makes it easier for the viewer to “understand” it. Simulation tools usually only provide the opportunity for a unidirectional visualising. In a 3-dimensional surrounding the viewer can not implement an interaction with the simulation while the system is running. Though an interaction during the simulation run enables the user to gain a better understanding of causal cohesions. Solutions via HLA are sophisticated and therefore rather suited for extensive projects. We present a distributed system consisting of a commercial manufacturing simulation tool, a coupling module and a walkthrough system. The distributed system in conjunctions with the coupling module guarantees generality and a wide field of applications of the walkthrough system. Further it guarantees flexibility and selection of the specialized graphics hardware for the walkthrough system. A further contribution of this paper is the solution of the time synchronisation problem caused by simulation tool and walkthrough system. }}, author = {{Mueck, Bengt and Dangelmaier, Wilhelm and Fischer, Matthias and Klemisch, Wolfram}}, booktitle = {{Simulation und Visualisierung}}, pages = {{71--84}}, publisher = {{SCS European Publishing House}}, title = {{{Bi-directional Coupling of Simulation Tools with a Walkthrough-System}}}, year = {{2002}}, } @book{23943, author = {{Dangelmaier, Wilhelm}}, publisher = {{Verlagsschriftenreihe des Heinz Nixdorf Instituts, Paderborn}}, title = {{{KOMNET - Kommunikationsplattform für kmU-Netzwerke}}}, volume = {{41}}, year = {{1998}}, }