Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 31 for “"Transient Simulation"”.
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Methodologies for Transient Simulation of Hybrid Electromagnetic/Circuit Systems with Multiple Time Scales
… methodologies to facilitate the efficient cosimulation of electromagnetic/circuit systems while exploiting the multiple time scales that are often present in the numerical simulation of such systems. Three distinct approaches are presented to expedite such a simulation process, with the …
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The development of a SPICE2 model for transient simulation of the Schottky Transistor
… of such a model for SPICE2 (a circuit simulation computer program) using a new method for model construction. This new method developes a model by approximating the mathematics of the simulation via perturbations and iterations. The model developed by the new method yields a minimum …
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Fast transient simulation of fernandez surge arrester model on a transmission line using ATP
… to analyze its effect to system. When fast front transients, such as from lightning, are to be investigated, the MOV surge arrester behavior representation is significantly different. So, fast front surge arrester is designed because it has dynamic characteristics that are significant for …
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Fast transient simulation of pinceti surge arrester model on a transmission line using ATP Software
… model is proposed to simulate using Alternative Transient Program (ATP) software. Several procedures have been following to calculate Pinceti arrester model parameters so that compatible with 132kV overhead transmission line system. Tested result by simulation is compared with the manufacturer …
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Comprehensive algorithm for eye diagram crossing point detection and eye parameter extraction in transient simulation
This thesis presents a comprehensive algorithm to improve the accuracy of crossing point detection in eye diagrams, a critical component of eye parameter extraction in signal integrity analysis. Current industry tools often fail in edge cases, particularly when dealing with nonlinearities and high …
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Component development for a high fidelity transient simulation of a coal-fired power plant using Flownex SE
… on the grid. Consequently, the need for a fully transient high-fidelity system based model has grown, as this will enable one to study the behaviour of plants under such non-ideal conditions. This report details the development of a feedwater heater, deaerator and turbine component for such a …
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Fast transient simulation of IEEE recommended surge arrester model on a transmission line using alternative transient program (ATP)
… the outcomes of the performance evaluation simulation residual voltage output resulting from lightning arrestors IEEE Recommended model. This simulation uses software Alternative Transient Program - Electromagnetic transients Programmed (ATP-EMTP). This software is very appropriate in …
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Modeling and control of wastegate equipped turbocharged engines
A method of modeling, simulating (transient), and designing controllers for turbocharged engine systems is presented. The method is specific to spark ignition (SI) engines equipped with pneumatic, spring diaphragm, wastegate actuators, with solenoid valve active boost control. The method revolves …
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Numerical and Experimental Analysis of a TurboPiston Pump
… through hand calculations. Furthermore, a transient simulation was performed in CFD using Fluent to provide a better estimate of what will happen in the actual pump while running. Additionally, an experimental rig was designed to investigate the performance of the first generation valve on …
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A comparison of thermal storage models with a solar electric generation system using Trnsys
Two new component types were developed for the transient simulation program TRNSYS with IISiBat that models three different types of sensible thermal storages for analysis with use in a solar electric generating system (SEGS) simulation. One component containing a fully mixed, stratified and a plug …
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Circuit and Modeling Solutions for High-Speed Chip-to-Chip Communication
… degraded signals for the purpose of simulation are also presented and used to verify the proposed equalization and filtering topologies. Specifically, a new technique for modeling high-speed jittery clocks in the frequency domain is presented and shown to reduce transient simulation …
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Análise da aerodispersão de contaminantes em laboratórios de pesquisa com biossegurança
… The analysis were conducted using numerical simulations, with the computational fluid dynamics (CFD) technique. Three benchmarks, related to this class of problems, were used for CFD code validation. This thesis’ modeling assumption was that related contaminants were generated inside a …
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Model-Order Reduction Techniques for Circuits and Interconnects Simulation
… the models. This allows the efficient accurate simulation of frequency-dependent coupled transmission lines characterized by scattering parameters and an optimal reference system. The heterogeneous reduction techniques are woven into a unified method by using network partitioning techniques. …
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DETECTING DELAY ANOMALIES INTRODUCED BY HARDWARE TROJANS USING CHIP AVERAGING AND AN ON-CHIP HIGH RESOLUTION EMBEDDED TEST STRUCTURE
… the process and enhances the effectiveness of a simulation-based golden model. Path delay tests are applied to multiple copies of a 90 nm custom ASIC chip which incorporates two copies of an AES macro as well as a SPICE-level transient simulation model. The AES macros are exact replicas except …
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Characterization, Design, and Modeling of on -Chip Electrostatic Discharge Protection Devices
… models are provided to ensure accurate ac and transient simulation. Improved avalanche multiplication factor equations are used to avoid convergence problems. Key modeling parameters are analyzed and important elements identified for accurate capture of the trigger voltage. Various trigger …
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Experimental and Analytical Investigation of the Transient Thermal Response of Air Cooled Data Centers
<p>This work investigates the transient response of the thermal environment in air cooled data centers through experiments, analytical and computational tools. The key thermal characteristics of the various data center components were extracted from a set of experiments. This includes the …
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Dynamic response of the supercritical C0₂ Brayton recompression cycle to various system transients
… point create complications in control. The Transient SC0₂ Cycles Code (TSCYCO) has been developed as a transient simulation control design and cycle scoping code for the recompression SC0₂ Brayton cycle. It is based off of the SC0₂ Power Systems (SCPS) code, and incorporates many …
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Parameter estimation of a composite load model using a hybrid approach
… load models are needed to ensure meaningful transient simulation results. We investigate the use of a composite load (CLOD) model to represent an aggregate load. Two algorithms for the parameter estimation of the CLOD model are presented and analyzed. The first uses nonlinear optimization and …
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Radio frequency interference (RFI) modeling of complex modules in mobile devices and system-level modeling for transient ESD simulation
… electrostatic discharge (ESD) system-level transient simulation modeling method and discusses its validation using IEC 61000-4-2 ESD pulses on a real-world product. The system model is composed of high current and broadband (up to 3GHz) models of R, L, C, ferrite beads, diodes, and …
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Two-dimensional simulation of quantum well lasers including energy transport
… of semiconductor lasers for both steady and transients has been developed. The simulator is capable of spectral analysis of quantum-well semiconductor lasers, such as gain-spectrum analysis, as well as analysis of the two-dimensional current flow and optical intensity patterns. The simulator …
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