Yazar "Koksal, M" seçeneğine göre listele

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    Charging and discharging of particles on the low-potential electrode under bipolar corona conditions
    (Iop Publishing Ltd, 1998) Aliyev, HZ; Koksal, M; Aksoy, I; Yakinci, ME
    In this work, the process of charging and discharging of aerosol particles on the surface of a low-potential electrode and their behaviour depending on the charge that they have are investigated under bipolar corona conditions. A general expression to characterize the kinetics of charging of these particles is developed so that this expression yields many of the special equations that have been reported in the literature and are valid under certain conditions. It is found that the intensity of the corona discharging field affects both the amount of stable charge on the particle and its charging time; in general, the time constant for discharging and the coefficient of bipolarity determine the amount of stable charge. The obtained results indicate that, under suitable conditions, use of a bipolar corona field can be an alternative technique for cleaning and refining impure aerosol mixtures for desired purposes.
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    Derivation of state and output equations for systems containing switches and a novel definition of a switch using the bond graph model
    (Pergamon-Elsevier Science Ltd, 1997) Demir, Y; Poyraz, M; Koksal, M
    This Study gives a novel switch definition which is at the same time simple and more general. In addition, a formulation giving state and output equations is presented by using the bond graph model of switch-containing systems. The use of a computer program called BONDSO is described and examples of the application are given. Copyright (C) 1997 Published by Elsevier Science Ltd.
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    Robust controller design for TITO processes with coefficient diagram method
    (Ieee, 2003) Hamamci, SE; Koksal, M
    In this paper, Coefficient Diagram Method (CDM) is used to design controller for two-input two-output (TITO) processes. The interaction between the loops are minimized by using the conventional decoupler design method; then, decentralized CDM controllers are designed for the process and decoupler blocks. Several examples are presented to illustrate the effectiveness of the proposed method and compared it with existing ones. It is shown that CDM design is more stable and robust whilst giving the desired time domain performance.
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    Steady state analysis of periodically time-varying networks by new developments in the spectral domain
    (John Wiley & Sons Ltd, 1996) Tohumoglu, G; Koksal, M
    [Abstract Not Available]
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    Theory of high-gradient magnetic filter performance
    (Ieee-Inst Electrical Electronics Engineers Inc, 1999) Abbasov, T; Koksal, M; Herdem, S
    A unique general model for high-gradient magnetic filters is presented. The functional dependence of the filter performance on the system's physical and geometrical parameters is derived. The derived theoretical expression makes it possible to explain both of the two different, apparently opposite, experimental results reported in the literature. The new quality factor does not include the suspension viscosity, but instead depends on the suspension density, which leads to the application of the formula for a larger class of filtration media including liquids, gases, and vapors.
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    Transient analysis of nonuniform lossy transmission lines with frequency dependent parameters
    (Elsevier Science Sa, 1999) Mamis, MS; Koksal, M
    An s-domain method for transient analysis of lossy, frequency dependent nonuniform transmission lines having parameters arbitrary varying with space is presented. Nonuniform line is divided into adequate number of sections which are then assumed uniform. The terminal equation for the nonuniform line is calculated by using the terminal equations of the uniform line sections. By using the boundary conditions, total response in s-domain is obtained. Fast inverse Laplace transform is used for frequency to time domain conversion. In one of the examples, the step response of an open ended nonuniform line is obtained and the results are compared with those obtained by lattice-diagram technique. The effect of number of sections is investigated and it is concluded that for sufficiently large number of sections, the results approach to the analytical solutions which can be obtained only for very special nonuniform lines. In the second example, the method is applied for the calculation of transmission tower lightning surge response. (C) 1999 Elsevier Science S.A. All rights reserved.