MODELING AND SIMULATION OF DYNAMIC SYSTEMS PDF
PDF | The bond graph notation is defined and its underlying port-concept is explained. 3 Modeling and simulation of dynamic behavior of physical systems. Welcome to this NPTEL course on Modelling and Simulation of Dynamic systems . I am. Pushparaj Mani Pathak – Associate Professor in Mechanical and. MODELING AND SIMULATION OF DYNAMIC SYSTEMS. Inge Troch and Felix Breitenecker. Vienna University of Technology, Austria. Keywords: System.
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Modeling of dynamic systems / Lennart Ljung, Torkel Glad. p. cm. .. limitation in models and simulations: It is hazardous to use a model outside the area. Cable Hoist Example (PDF 1) (PDF 2). Bond Graph Primitives (PDF - MB). DCPMM Basics (PDF). Block Diagrams and Bond Graphs (PDF). Pump Model. Institute for Dynamic Systems and Control. ETH Zurich, Switzerland Definitions: Modeling and Analysis of Dynamic Systems. Dynamic Systems simulation. 3.
Their design requires the development of multiphysical simulation models and using them the model based control design. Both these areas are in rapid development.
This contribution presents the following material: the concept of mechatronical system, the methods for development of simulation models of multiphysical systems, the methods of model based control design and examples of mechatronical applications in vehicles.
This is a preview of subscription content, log in to check access. Preview Unable to display preview. Download preview PDF. Bibliography ACSL. Google Scholar M. Numerical methods in the simulation of vehicle-guideway interaction. Buikis, R. Ciegis, and A. Springer-Verlag, Berlin Heidelberg, Arnold, A. Carrarini, A. Heckmann and G. Simulation techniques for multidisciplinary problems in vehicle system dynamics. Valasek ed.
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Dynamic Systems Biology Modeling and Simulation
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An example of the latter would be Barnard College 's Reacting to the Past series of historical educational games. This is also called a Social media stresstest.
In recent years, there has been increasing use of social simulations for staff training in aid and development agencies. The Carana simulation, for example, was first developed by the United Nations Development Programme , and is now used in a very revised form by the World Bank for training staff to deal with fragile and conflict-affected countries.
Specifically, virtual firearms ranges have become the norm in most military training processes and there is a significant amount of data to suggest this is a useful tool for armed professionals. Virtual simulations allow users to interact with a virtual world. Virtual worlds operate on platforms of integrated software and hardware components.
In this manner, the system can accept input from the user e. There is a wide variety of input hardware available to accept user input for virtual simulations.
The following list briefly describes several of them: Body tracking: The motion capture method is often used to record the user's movements and translate the captured data into inputs for the virtual simulation. For example, if a user physically turns their head, the motion would be captured by the simulation hardware in some way and translated to a corresponding shift in view within the simulation. The systems may have sensors incorporated inside them to sense movements of different body parts e.
Alternatively, these systems may have exterior tracking devices or marks that can be detected by external ultrasound, optical receivers or electromagnetic sensors.
Internal inertial sensors are also available on some systems. The units may transmit data either wirelessly or through cables.
Eye trackers can also be used to detect eye movements so that the system can determine precisely where a user is looking at any given instant. Physical controllers: Physical controllers provide input to the simulation only through direct manipulation by the user. In virtual simulations, tactile feedback from physical controllers is highly desirable in a number of simulation environments.
High fidelity instrumentation such as instrument panels in virtual aircraft cockpits provides users with actual controls to raise the level of immersion. For example, pilots can use the actual global positioning system controls from the real device in a simulated cockpit to help them practice procedures with the actual device in the context of the integrated cockpit system.
Voice interaction presumably increases the level of immersion for the user. Users may use headsets with boom microphones, lapel microphones or the room may be equipped with strategically located microphones. Current research into user input systems[ edit ] Research in future input systems holds a great deal of promise for virtual simulations. Systems such as brain—computer interfaces BCIs offer the ability to further increase the level of immersion for virtual simulation users. Using the BCI, the authors found that subjects were able to freely navigate the virtual environment with relatively minimal effort.
It is possible that these types of systems will become standard input modalities in future virtual simulation systems. Virtual simulation output hardware[ edit ] There is a wide variety of output hardware available to deliver a stimulus to users in virtual simulations. The following list briefly describes several of them: Visual display: Visual displays provide the visual stimulus to the user.
Stationary displays can vary from a conventional desktop display to degree wrap-around screens to stereo three-dimensional screens. Wrap around screens is typically utilized in what is known as a cave automatic virtual environment CAVE. Stereo three-dimensional screens produce three-dimensional images either with or without special glasses—depending on the design.
Head-mounted displays HMDs have small displays that are mounted on headgear worn by the user. These systems are connected directly into the virtual simulation to provide the user with a more immersive experience. Weight, update rates and field of view are some of the key variables that differentiate HMDs.
Naturally, heavier HMDs are undesirable as they cause fatigue over time. If the update rate is too slow, the system is unable to update the displays fast enough to correspond with a quick head turn by the user. Slower update rates tend to cause simulation sickness and disrupt the sense of immersion. Field of view or the angular extent of the world that is seen at a given moment field of view can vary from system to system and has been found to affect the user's sense of immersion.
Aural display: Several different types of audio systems exist to help the user hear and localize sounds spatially.
Special software can be used to produce 3D audio effects 3D audio to create the illusion that sound sources are placed within a defined three-dimensional space around the user. Stationary conventional speaker systems may be used to provide dual or multi-channel surround sound. However, external speakers are not as effective as headphones in producing 3D audio effects. They also have the added advantages of masking real-world noise and facilitate more effective 3D audio sound effects.
This type of output is sometimes referred to as force feedback. End effector displays can respond to users inputs with resistance and force. They often manifest as motion bases for virtual vehicle simulation such as driving simulators or flight simulators. Motion bases are fixed in place but use actuators to move the simulator in ways that can produce the sensations pitching, yawing or rolling. The simulators can also move in such a way as to produce a sense of acceleration on all axes e.
Clinical healthcare simulators[ edit ] Main article: Medical simulation Medical simulators are increasingly being developed and deployed to teach therapeutic and diagnostic procedures as well as medical concepts and decision making to personnel in the health professions. Simulators have been developed for training procedures ranging from the basics such as blood draw, to laparoscopic surgery  and trauma care.
They are also important to help on prototyping new devices  for biomedical engineering problems. Currently, simulators are applied to research and develop tools for new therapies,  treatments  and early diagnosis  in medicine.
Dynamic Systems Biology Modeling and Simulation
Many medical simulators involve a computer connected to a plastic simulation of the relevant anatomy. In other simulations, visual components of the procedure are reproduced by computer graphics techniques, while touch-based components are reproduced by haptic feedback devices combined with physical simulation routines computed in response to the user's actions.
Some medical simulations are developed to be widely distributed such as web-enabled simulations  and procedural simulations  that can be viewed via standard web browsers and can be interacted with using standard computer interfaces, such as the keyboard and mouse.
Another important medical application of a simulator—although, perhaps, denoting a slightly different meaning of simulator—is the use of a placebo drug, a formulation that simulates the active drug in trials of drug efficacy see Placebo origins of technical term. Improving patient safety[ edit ] Patient safety is a concern in the medical industry.
Patients have been known to suffer injuries and even death due to management error, and lack of using best standards of care and training. According to Building a National Agenda for Simulation-Based Medical Education Eder-Van Hook, Jackie, , "a health care provider's ability to react prudently in an unexpected situation is one of the most critical factors in creating a positive outcome in medical emergency, regardless of whether it occurs on the battlefield, freeway, or hospital emergency room.
Simulation is being used to study patient safety, as well as train medical professionals. Groves et al. There is also good evidence that procedural simulation improves actual operational performance in clinical settings. One study found that just in time training improved the transition to the bedside. The conclusion as reported in Nishisaki work, was that the simulation training improved resident participation in real cases; but did not sacrifice the quality of service.
It could be therefore hypothesized that by increasing the number of highly trained residents through the use of simulation training, that the simulation training does, in fact, increase patient safety. History of simulation in healthcare[ edit ] The first medical simulators were simple models of human patients. Models have been found in many cultures and continents. These models have been used in some cultures e. Models are used today to help students learn the anatomy of the musculoskeletal system and organ systems.
The famous "Harvey" mannequin was developed at the University of Miami and is able to recreate many of the physical findings of the cardiology examination, including palpation , auscultation , and electrocardiography. Computer simulations have the advantage of allowing a student to make judgments, and also to make errors.
The process of iterative learning through assessment, evaluation, decision making, and error correction creates a much stronger learning environment than passive instruction. These "lifelike" simulations are expensive, and lack reproducibility. A fully functional "3Di" simulator would be the most specific tool available for teaching and measurement of clinical skills. Gaming platforms have been applied to create these virtual medical environments to create an interactive method for learning and application of information in a clinical context.
Using sensors and transducers symptomatic effects can be delivered to a participant allowing them to experience the patients disease state.
Such a simulator meets the goals of an objective and standardized examination for clinical competence.
Although modern simulation is thought to have its roots in training and the military, in the 20th century it also became a conduit for enterprises which were more hedonistic in nature.
History of visual simulation in film and games[ edit ] Early history s and s [ edit ] The first simulation game may have been created as early as by Thomas T.In such simulations, the model behaviour will change each simulation according to the set of initial parameters assumed for the environment.
Constructive simulation is often referred to as "wargaming" since it bears some resemblance to table-top war games in which players command armies of soldiers and equipment that move around a board.
Modeling, Simulation, and Control. These "lifelike" simulations are expensive, and lack reproducibility. Currently they are graduate students in the Dept. Magdolen and O. CrossRef Google Scholar M. Prevalent approaches to solving complex problems often involve decomposing them into component parts and analyzing some subset individually to identify candidate interventions.
Modeling and simulation of dynamic systems woods pdf File size: Nor does it make sense to randomly pull strategies from a grab bag of evidence-based policies and interventions.
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