Battery maintainers are widely used in marine and ground vehicles whose batteries have cycles of operation involving long periods of non-active life. Durability of such batteries, without proper maintenance, does not ...
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ISBN:
(纸本)1880843234
Battery maintainers are widely used in marine and ground vehicles whose batteries have cycles of operation involving long periods of non-active life. Durability of such batteries, without proper maintenance, does not exceed one year. Extension of the battery life-time requires very thorough monitoring and periodic, preferably automatic recharging to replenish lost charge due to battery self-discharge and external loads. Due to complex technical and environmental conditions, the battery chargers/maintainers must satisfy very strict requirements that complicates processes of design. During the designing phases of battery maintainers, very thorough modelling and simulations are very important. It is necessary to include variable charging strategies, environmental issues, and the character of charged batteries. The paper discusses modelling and simulation of two major generic types of battery chargers/maintainers. One type supplies the battery with constant current, another operates under constant charging voltage conditions. In both cases, the battery voltage and temperature must be monitored to define the best conditions for evaluation of the end of charging phase. In the paper, the results of simulations for the above battery maintainers are presented. Analog and digital control of charger/maintainer structures are presented.
The coating of surfaces by plasma spraying is an important manufacturing process with many industrial applications. In the last several decades, numerical modeling of plasma spraying processes has met with considerabl...
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The simulation and modeling of complex physical systems often involves many components because (i) the physical system itself has components of differing natures, (ii) parallel computing strategies require many (somew...
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The simulation and modeling of complex physical systems often involves many components because (i) the physical system itself has components of differing natures, (ii) parallel computing strategies require many (somewhat independent) components, and (iii) existing simulation software applies only to simpler geometrical shapes and physical situations. We discuss how agent based networks are applied to such multicomponent applications. The network agents are used to (a) control the execution of existing solvers on subcomponents, (b) mediate between sub-components, and (c) coordinate the execution of the ensemble. This paper focuses on partial differential equation (PDE) models as an instance of the approach and describes the implementation of networks using the PELLPACK problem solving environment for PDEs and the Bond system for agent based computing. Copyright (C) 2000 John Wiley & Sons, Ltd.
This book includes a selection of papers from the 8th International Conference on simulation and modeling Methodologies, Technologies and Applications (SIMULTECH 2018), held in Porto, Portugal, from July 29 to 31, 201...
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ISBN:
(数字)9783030359447
ISBN:
(纸本)9783030359430
This book includes a selection of papers from the 8th International Conference on simulation and modeling Methodologies, Technologies and Applications (SIMULTECH 2018), held in Porto, Portugal, from July 29 to 31, 2018. Presenting new and innovative solutions, the book features extended and revised versions of the very best conference papers as well as the latest research in the field.
This book highlights a set of selected, revised and extended papers from the 7th International Conference on simulation and modeling Methodologies, Technologies and Applications (SIMULTECH 2017), held in Madrid, Spain...
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ISBN:
(数字)9783030014704
ISBN:
(纸本)9783030014698
This book highlights a set of selected, revised and extended papers from the 7th International Conference on simulation and modeling Methodologies, Technologies and Applications (SIMULTECH 2017), held in Madrid, Spain, on July 26 to 28, 2017. The conference brought together researchers, engineers and practitioners whose work involves methodologies in and applications of modeling and simulation. The papers showcased here represent the very best papers from the Conference, and report on a broad range of new and innovative solutions.
A dense plasma focus (DPF) is a pulsed-power machine that electromagnetically accelerates and cylindrically compresses a shocked plasma in a Z-pinch. The pinch results in a brief (similar to 100ns) pulse of X-rays, an...
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A dense plasma focus (DPF) is a pulsed-power machine that electromagnetically accelerates and cylindrically compresses a shocked plasma in a Z-pinch. The pinch results in a brief (similar to 100ns) pulse of X-rays, and, for some working gases, also a pulse of neutrons. A great deal of experimental research has been done into the physics of DPF reactions, and there exist mathematical models describing its behavior during the different time phases of the reaction. Two of the phases, known as the inverse pinch and the rundown, are approximately governed by magnetohydrodynamics, and there are a number of well-established codes for simulating these phases in two dimensions or in three dimensions under the assumption of axial symmetry. There has been little success, however, in developing fully three-dimensional simulations. In this work we present three-dimensional simulations of DPF reactions and demonstrate that three-dimensional simulations predict qualitatively and quantitatively different behavior than their two-dimensional counterparts. One of the most important quantities to predict is the time duration between the formation of the gas shock and Z-pinch, and the three-dimensional simulations more faithfully represent experimental results for this time duration and are essential for accurate prediction of future experiments.
A novel vector control system of the split double-rotor motor based on indirect vector control principle has been proposed. The mathematic models of the primary machine and the secondary machine are set up respectivel...
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ISBN:
(纸本)9783037852163
A novel vector control system of the split double-rotor motor based on indirect vector control principle has been proposed. The mathematic models of the primary machine and the secondary machine are set up respectively. Through the coupling of the two models, the system model of the split double-rotor motor is build. Matlab software is used for the simulation and analysis of this indirect vector control system. According to the simulation results, the validity of system model is proved with nicer static and dynamic capability, and without steady-state error in stable state. These are important to analyze and design the double-rotor motor. Furthermore, the results provide the basis for simulation and apply of double-rotor motor in HEV.
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