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71.
Viktor Berbyuk 《Multibody System Dynamics》2007,18(2):203-216
The paper addresses mechatronic issue of multibody systems comprising giant magnetostrictive material based transducers (sensors
and/or actuators). Interaction between dynamics and control in multibody system with smart material based transducers makes
it possible to change system properties and functionality substantially as a response to applied electric, magnetic or temperature
fields. To use this interaction in an optimal way, the proper mathematical models of controlled electro-magneto-elastic multibody
systems need to be developed. In the paper, a general mathematical model of multibody systems with magnetostrictive transducers
is presented. The model consists of the constitutive equations of magnetoelastic behavior of transducers, standard formulae
of electromagnetism for induced voltage and current in the pick-up coil due to variation of magnetic field intensity, and
finally, the equations of motion of multibody system itself. The last one can be derived using one of the well-known multibody
dynamics formalisms. General model has been developed in detail for linearized dynamics of magnetostrictive transducers and
implemented virtually for two practically important cases of interaction of hosting multibody system with transducers, namely
for systems with displacement driven transducers and for systems with force driven transducers. Physical prototype of magnetostrictive
transducer and test rig (hosting multibody system) have been built and used successfully for verification of developed models. 相似文献
72.
Ivanov V. V. Efimov A. A. Mylnikov D. A. Lizunova A. A. Bagazeev A. V. Beketov I. V. Shcherbinin S. V. 《Technical Physics Letters》2016,42(8):876-878
Technical Physics Letters - We describe a method of obtaining aerosol nanoparticles in a repetitive spark discharge generator with 12 interelectrode gaps between tin electrodes, which operates at a... 相似文献
73.
Ji?í Jeništa Hidemasa Takana Hideya Nishiyama Milada Bartlová Vladimír Aubrecht Petr K?enek Viktor Sember Alan Mašláni 《Computer Physics Communications》2011,182(9):1776-1783
The paper presents numerical simulations of the discharge and the near-outlet regions of the hybrid-stabilized argon–water electric arc. Two different numerical methods for solving the set of conservative equations for the continuity, momentum and energy have been applied. The major difference between the results using the two methods occurs in the temperature distribution in arc fringes within the discharge chamber. This fact influences the potential drop, overpressure, reabsorption of radiation and arc efficiency. It is shown that the radial profiles of temperature at the exit nozzle are less influenced by different temperature distribution within the discharge chamber. Comparison with chosen experimental temperature profiles shows very good agreement. 相似文献
74.
A. S. Zharkov M. G. Potapov V. P. Lushev Yu. A. Galonko A. A. Pavlenko Yu. B. Zharinov Yu. N. Deryabin V. G. Efimov 《Combustion, Explosion, and Shock Waves》2000,36(1):72-75
A facility designed to determine the current burning rate of high-energy composite materials is described. Methodical aspects
of processing the measured information are considered. Results on the effect of humidity of the samples on their burning rate
are presented.
Translated fromFizika Goreniya i Vzryva, Vol. 36, No. 1, pp. 79–82, January–February, 2000. 相似文献
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78.
Svetlana Nikolić Ljiljana Mojović Marica Rakin Dušanka Pejin Viktor Nedović 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》2009,84(4):497-503
BACKGROUND: Bioethanol produced from renewable biomass, such as corn meal, is a biofuel that is both renewable and environmentally friendly. Significant scientific and technological investments will be needed to achieve substitution of conventional fossil fuels with alternative fuels. The ethanol fermentation of enzymatically obtained corn meal hydrolyzates by free and immobilized cells of Saccharomyces cerevisiae var. ellipsoideus yeast in a batch system was studied. The initial glucose and inoculum concentration and the time required for the efficient ethanol production were optimized taking into account parameters such as ethanol concentration, ethanol yield, percentage of the theoretical yield of ethanol and volumetric productivity in both immobilized and free cell systems. RESULTS: The yeast cells were immobilized in Ca–alginate by an electrostatic droplet generation method. An optimal initial inoculum concentration of 2% (v/v) and optimal fermentation time of 38 h for both immobilized and free yeasts were determined. An optimal initial glucose concentration of 150 g L?1 for free system was achieved. At the initial glucose concentration of 176 g L no substrate or product inhibition were achieved with immobilized yeast. CONCLUSION: By immobilization of the yeast into Ca–alginate using the method of electrostatic droplet generation a superior system was realized, which exhibited lower substrate inhibition and higher tolerance to ethanol. The cells of S. cerevisiae var. ellipsoideus yeast entrapped in Ca–alginate showed good physical and chemical stability, and no substrate and product diffusion restrictions were noticed. Copyright © 2008 Society of Chemical Industry 相似文献
79.
Pejman Kazempoor Viktor DorerAndreas Weber 《International Journal of Hydrogen Energy》2011,36(20):13241-13249
This study presents the final results of a series of modelling steps which are undertaken for the performance assessment of the building cogeneration and polygeneration systems using solid oxide fuel cell (SOFC). Based on earlier work, generic SOFC cell stack and system models were developed and employed to analyze different SOFC systems configurations for optimal efficiencies, this SOFC system model is used to derive performance input data for transient whole-building and energy system simulation tools which contain simpler SOFC system models. These steps are shortly summarized here. Then the final step, the evaluation of building integrated co- and polygeneration SOFC systems in terms of primary energy demand and CO2 emissions, employing such tools, is presented here for a polygeneration system with typical heating and cooling loads, and electricity demand profiles, for different SOFC systems, including a comparison to current standard technologies. 相似文献
80.
A. L. Reznik V. M. Efimov A. A. Solov’ev A. V. Torgov 《Optoelectronics, Instrumentation and Data Processing》2011,47(6):533-536
The notion of the Catalan numerical sequence is extended. Problems leading to generalized Catalan numbers are formulated and
solved. 相似文献