Topic
Modeling and simulation
About: Modeling and simulation is a research topic. Over the lifetime, 10273 publications have been published within this topic receiving 111550 citations.
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08 Nov 1996TL;DR: The new methodology integrates three established modeling approaches into one language called Hybrid High-level Nets (HYNETS), which explains basic ideas of the language and illustrates its usefulness with a small example.
Abstract: This paper presents a new methodology for modeling and simulation of hybrid systems which is called Hybrid High-level Nets (HYNETS). The new methodology integrates three established modeling approaches into one language. High-level Petri Nets represent the basic discrete framework, differential algebraic equations (DAEs) are used to describe continuous systems behavior and object-oriented concepts improve the expressiveness and compactness of models. The paper explains basic ideas of the language and illustrates its usefulness with a small example.
50 citations
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04 Mar 2001
TL;DR: In this article, an extended averaged model is developed for a soft-switched bi-directional DC-DC converter for high-power applications, and the proposed technique can be applied to other Bi-DDC power converters with a high-frequency isolation transformer.
Abstract: In this paper, an extended averaged model is developed for a soft-switched bi-directional DC-DC converter for high-power applications. The proposed technique can be applied to other bi-directional DC-DC power converters with a high-frequency isolation transformer. Simulation results of Matlab/Simulink using the proposed average model are compared to those of detailed circuit simulation and experimental results to confirm the validity of this technique.
50 citations
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TL;DR: Time-domain modeling and simulation techniques of the ADPLL are proposed that are well suited for system analysis using high-level programming languages, e.g., Matlab, and enable the development of accurate and time-efficient behavioral models.
Abstract: A new phase-domain all-digital phase-locked loop (ADPLL) for RF wireless applications has recently been proposed and commercially demonstrated. In this brief, we propose time-domain modeling and simulation techniques of the ADPLL that are well suited for system analysis using high-level programming languages, e.g., Matlab. They are based on the event-driven principles inherent in hardware description languages, e.g., VHDL, and enable the development of accurate and time-efficient behavioral models. The proposed techniques are demonstrated and validated through experimental results for a GSM standard.
50 citations
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TL;DR: In this article, a flexible, fast and trustworthy H-formulation finite element model for modeling superconducting magnetic bearings (SMBs) is presented, which can be used for speeding up the development of numerous applications including maglev vehicles, magnetic launchers, flywheel energy storage systems, motor bearings and cosmic microwave background polarimeters.
Abstract: The modeling of superconducting magnetic bearings (SMBs) is of great significance for predicting and optimizing their levitation performance before construction. Although much effort has been made in this area, there still remains some space for improvements. Thus the goal of this work is to report a flexible, fast and trustworthy H-formulation finite element model. First the methodology for modeling and calibrating both bulk-type and stack-type SMBs is summarized. Then its effectiveness for simulating SMBs in 2D, 2D axisymmetric and 3D is evaluated by comparison with measurements. In particular, original solutions to overcome several obstacles are given: clarification of the calibration procedure for stack-type and bulk-type SMBs, details on the experimental protocol to obtain reproducible measurements, validation of the 2D model for a stack-type SMB modeling the tapes' real thickness, implementation of a 2D axisymmetric SMB model, implementation of a 3D SMB model, and extensive validation of the models by comparison with experimental results for field cooling and zero field cooling, for both vertical and lateral movements. The accuracy of the model being having proven, it now has a strong potential for speeding up the development of numerous applications including maglev vehicles, magnetic launchers, flywheel energy storage systems, motor bearings and cosmic microwave background polarimeters.
50 citations
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TL;DR: In this article, a validated 3D computational fluid dynamics model of a single cell proton exchange membrane fuel cell (PEMFC) was used for investigating convergence criteria and convergence data up to 19,000 iterations were collected in order to establish expectations for convergence errors and differences in convergence rates for different boundary conditions.
50 citations