Modeling And Simulation Research Articles

Mapping RDEVSNL-based Definitions of Constrained Network Models to Routed DEVS Simulation Models

The Routed DEVS (RDEVS) formalism has been introduced recently to provide a reasonable formalization for the simulation of routing processes over Discrete Event System Specification (DEVS) models. Due to its novelty, new software tools are required to improve the Modeling and Simulation (MS) tasks related to the RDEVS formalism. This paper presents the mapping between constrained network models obtained from textual specifications of routing processes and RDEVS simulation models implemented in Java. RDEVSNL context-free grammar (previously defined) is used to support the textual specification of a routing process as a constrained network model. Such grammar is based on a metamodel that defines the syntactical elements. This metamodel is used in this paper as a middleware that allows mapping constrained network model concepts with RDEVS simulation models. From such a constrained network model template, RDEVS Java implementations are obtained. The proposal is part of a work-in-progress intended to develop MS software tools for the RDEVS formalism using well-known abstractions to get the computational models through conceptual mapping. Using these tools, modelers can specify simulation models without needing to codify any routing implementation. The main benefits are i) reduction of implementation times and ii) satisfactory simulation model correctness regarding the RDEVS formalism.

Tools and Techniques for Teaching and Research in Network Design and Simulation

Computer networking is taught for some time at universities. A network is a complex mix of applications, communications protocols and link technologies, traffic flows and routing algorithms. Teaching the networking concept, the network design process is a challenging task, requiring designers to balance user performance expectations with costs and capacities. One of the obvious approaches employed to deal with its complexity is through the use of modelling and simulation techniques. This paper examines three best educational tools that can be used in the Computer Networking course at Cardiff Metropolitan University or any University for educational purpose. The paper demonstrates that a successful teaching programme needs to combine a range of teaching tools to achieve its aims. Analysing various aspects of the course provides evaluation of the overall success of the tools. Many network design and simulation tools have been studied. Based on our research and experiment, the best educational tools were selected that could be used for the purpose of teaching in the area of computer communications networks. The wide area network modelling tool Delite, the network simulator ns-3, the topology generation tool Brite can be used together to teach students the networking concepts. These tools can not only help students to understand computer network principles but also improve their network practical skills. Currently there are various tools available that are created by different companies and groups of researchers in academia and that are intended for use as practical and/or educational tools for network design including security issues. To make this task easy, different users, researchers and companies have developed different network modelling and simulation (MS) tools. Very often, such tools are addressing different issues in the network design process which are complementary to each other. It would be useful for learning and improving the network design process by allowing the use of a variety of tools.

SUPPLIER SELECTION IN AN INDUSTRY OF SHORT LIFECYCLE PRODUCTS USING BAYESIAN NETWORK ANALYSIS

This study presented an innovative Bayesian Network (BN) modelling andsimulation for supplier selection problem of an actual electronic parts manufacturing firm of Pakistan.The list of qualitative and quantitative factors which affect this supplier selection decision wasextracted from a variety of studies in literature. The problem was modelled and solved in respectiveBN software platform using the standard recommended procedure. Results showed that ―Quality‖ and ―Costs‖ were the most crucial factors for the Short Life Cycle(SLP) products industry underinvestigation. The supplier alternative which was strong in these factors, had emerged as the most suitable option. The results were found to be beneficial for other SLP industries of Pakistan too.

Design of HMI Based Digital Electric Bike Using DC/AC Power Converter with Regenerative Feature

The research project introduces an efficient HMI-based digitally controlled electric bike hardware model. Thesystem is designed using power electronics and LCD touch control. A low-cost model with regenerative features increases the acceptance of electric vehicles in Pakistan. The country is facing grave environmental issues and the transport sector has a major role in polluting the environment. Technology also promotes the environment-friendly electric vehicles Industry and reduces the growing pollution problem of the country. Economical transport with feasible milage is an essential need of the current time. Research provides the effective Electric-bike with digital security and improved mileage. A Six-Step DC/AC power converter drives the low consumption BLDC motor. The project analyzed the real-time performance of the electric vehicle on HMI. A regenerative braking system generates power while reducing the speed of a moving electric bike. The modeling andsimulation are performed using Proteus/Multisim simulating software. Results are verified using a hardware test model. The results will be helpful for design commercial advance HMI-based electric bikes in terms of motor requirement, machine behaviour, charging/discharging analysis at a different speed and torque, charging the battery while driving, and their limitations.

Three-Phase Fault Analysis on Transmission Line in Matlab Simulink

Now-a-days the demand of electricity or power areincreases day by day this results to transmits more power byIncreasing the transmission line capacity from one place to theother place. But during the transmission some faults areoccurred in the system, such as L-L fault (line to line), 1L-Gfault (single line to ground) and 2L-G fault (double line toground). These faults affect the power system equipmentswhich are connected to it. The main aim of this paper is tostudy or analysis of faults and also identifies the effect of thefault in transmission line along with bus system which isconnected to transmission line. Mainly the major faults in longtransmission lines is (L-G) single line to ground fault which areharmful to the electrical equipment. A proposed model intransmission line is simulated in MATLAB software to analysisand identified the faults. Fault block was taken from the sim-power system block library. The whole modeling andsimulation of different operating and different conditions offault on transmission line, their faults are L-G fault, 2L-Gfault, 3L-G fault and three line short circuit of the proposedwork is presented in this paper.

Modeling and simulation of temperature nano-probes for nano-devices with variable powers

Modeling and simulation of temperature nano-probes for nano-devices with variable powers

Modeling and Simulation of 4-Axis Dedicated Robot for CNC Lathe

Modeling and Simulation of 4-Axis Dedicated Robot for CNC Lathe

Modeling and simulation of forces applied to the horizontal axis wind turbine rotors by the vortex method coupled with the method of the blade element

This work focuses on the study of the forces applied to the rotors of horizontal axis wind turbines. The aerodynamics of a wind turbine is regulated by the flow around the rotor, where the prediction of air loads on the rotor blades in various operational conditions and its relationship with the structural dynamics of the rotor is crucial for design purposes. One of the most important challenges in the aerodynamics of wind turbines therefore to accurately predict the forces on the blade when the blade and the wake are modeled by different approaches such as the theory of the blade element (BEM) the vortex method and CFD method which involves solving the Navier-Stokes equations. In our article, the model is used for modeling and simulate the forces applied to the rotors of wind turbines horizontal axis use the application of the method of the blade element for modeling the rotor and the vortex method of free wake modeling in order to develop a model of the rotor, which can be used to study wind farms. This model is intended to speed up the calculation, guaranteeing a good representation of aerodynamic loads exerted by the flow of wind.

Modeling and Simulation of LEACH Protocol to Analyze DEVS Kernel-models in Sensor Networks

Modeling and Simulation of LEACH Protocol to Analyze DEVS Kernel-models in Sensor Networks

Situational Awareness of COVID Pandemie data using Virtual Reality

Situational awareness provides the decision making capability to identify, process, and comprehend big data. In our approach, situational awareness is achieved by integrating and analyzing multiple aspects of data using stacked bar graphs and geographic representations of the data. We provide a data visualization tool to represent COVID pandemic data on top of the geographical information. The combination of geospatial and temporal data provides the information needed to conduct situational analysis for the COVTD-19 pandemic. By providing interactivity, geographical maps can be viewed from different perspectives and offer insight into the dynamical aspects of the COVTD-19 pandemic for the fifty states in the USA. We have overlaid dynamic information on top of a geographical representation in an intuitive way for decision making. We describe how modeling and simulation of data increase situational awareness, especially when coupled with immersive virtual reality interaction. This paper presents an immersive virtual reality (VR environment and mobile environment for data visualization using Oculus Rift head-mounted display and smartphones. This work combines neural network predictions with human-centric situational awareness and data analytics to provide accurate, timely, and scientific strategies in combatting and mitigating the spread of the coronavirus pandemic. Testing and evaluation of the data visualization tool have been done with realtime feed of COVID pandemic data set for immersive environment, non-immersive environment, and mobile environment.

Flexural strength of concrete-galvalume composite beam under elevated temperatures

In this paper, the elevated temperature on a concrete-galvalume composite beam's flexural strength based on the numerical and experimental methods is investigated. The strategy is to perform modeling and simulation of the flexural test based on finite element method (FEM) at room temperature and validate its results by using experiments at the same temperature. With material constants and boundary conditions set-up provided from the validation, we model and simulate the same flexural tests for the composite at higher temperatures. The study concludes that the flexural strength of the beam decreases at higher temperature. Additionally, it was shown that cracking moments is very sensitive to the temperature fluctuation and the failure modes are sensitive with respect to the elevated temperature.

Modeling and Simulation as a Service

Modeling and Simulation as a Service

Modeling and Simulation of Pneumatic Soft Actuator with Multiple Chambers

Modeling and Simulation of Pneumatic Soft Actuator with Multiple Chambers

Modeling and simulation of a multi-pole multi-layer magnetorheological brake

Modeling and simulation of a multi-pole multi-layer magnetorheological brake

On the Modeling and Simulation with Uncertainty of Human/Society and Systems/Services supporting Society5.0

On the Modeling and Simulation with Uncertainty of Human/Society and Systems/Services supporting Society5.0

Biomass Combined Heat and Power Generation for Anticosti Island: A Case Study

Combined heat and power (CHP) plants (co-generation plants) using biomass as fuel, can be an interesting alternative to the predominant electrical heating in Canada. The biomass-fueled boiler provides heat for the steam cycle which in turn generates electricity from the generator connected to the steam turbine. In addition, heat from the process is supplied to a district heating system. The heat can be extracted from the system in a number of ways, by using a back-pressure steam turbine, an extraction steam turbine or by extracting heat directly from the boiler. The objective of the paper is the design, modeling and simulation of such CHP plant. The plant should be sized for providing electric-ity and heat for the Anticosti Island community in Quebec.

모델링 및 시뮬레이션 기법을 이용한 적외선 영상 생성 연구

모델링 및 시뮬레이션 기법을 이용한 적외선 영상 생성 연구

CFD Modelling and Simulation of a VOC Removal Silo

The removal of volatile organic compounds (VOC) is an environmentally challenging problem. The organic compounds are widely used in automotive, plastic, and other industries. The systems containing VOC are multiphase by nature, often with solid, liquid, and gas phases.The different devices and processes can be used for the separation task, for example, scrubbing. However, the simplest way to treat a system with VOC is a counter current gas contact, where the flowing gas purifies the product. This operation can be completed in columns, where the solid particles are discharging, and the gas is fed at the bottom of the column to ensure the proper phase contact and residence time.In our previous work, the modelling and optimisation of a laboratory scale silo were performed [1]. After the mesh independence study, the measured residence times were compared to the simulated ones, and a validated model was created. Then we optimized the inner construction of the vessel by placing inserts serves the optimal discharge (mass flow) of the silo.In this study, we extend the capabilities of the model by the inclusion of the counter-current gas stream. Multiscale and multidimensional models are implemented to calculate the interparticle removal and surface reactions. The model with different spatial dimensions was compared to each other by the mean of information transfer, and content as well. The modelling approaches are compared to each other based for further use. In the case of pseudo-2D devices, where the changes in one of the spatial dimensions is neglectable there is no need to implement 3D simulations, it is enough to create a proper 2D model.

Dynamic What-if Modeling Simulation

Dynamic modeling and simulation will be used to provide an understanding of the interactions between various complex systems. This dynamic model is based on an enterprise architecture framework whereby complex, dynamic and non-linear interactions, particularly those involving the human, can be understood and analyzed. Our modeling approach will include a synthesis of top-down and bottom-up strategies. The top-down portion will analyze high-level, mandated guidance and trace its tenants down to individually identifiable activities at the worker-level. We will then model these activities through the provision of a discrete event task model emphasizing research-based human performance and cognitive workload principles (bottom-up). These principles are based on accepted theories of the interaction between cognitive workload and human error. Synthesizing these two approaches will demonstrate both the impact and effect of high-level mandated activities and aid analysts in their understanding of how, why and when these impacts help or possibly hinder humans at the worker level. Benefits of using this model, namely the ability to predict what if scenarios in real time will be discussed. The model will be tested across multiple domains to demonstrate the potential modeling approach and its application in future hazard analyses.

FT Modelling and Simulation (1)

FT Modelling and Simulation (1)