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نمایش تعداد 1-10 از 62

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    CLOSED FORM SOLUTIONS FOR ELECTROSTATICALLY ACTUATED MICROMIRRORS CONSIDERING THE BENDING EFFECT 

    نوع: Conference Paper
    نویسنده : حمید معین فرد; M. Taghi Ahmadian; H. Moeenfard; Hamid Moeenfard
    سال: 2011
    خلاصه:

    In the current paper, analytical solutions are presented

    for the nonlinear problem of electrostatically actuated

    torsional micromirrors considering the bending of the

    torsional beams. Energy method is used for finding the...

    A coupled two degree of freedom pull-in model for micromirrors under capillary force 

    نوع: Journal Paper
    نویسنده : Ali Darvishian; حمید معین فرد; Mohammad Taghi Ahmadian; Hassan Zohoor; Hamid Moeenfard
    سال: 2012
    خلاصه:

    The current paper presents a two degree of freedom model for the problem of micromirrors under capillary force. The principal of minimum potential energy is employed for finding the equilibrium equations governing the deflection and the rotation...

    Analytical modeling of bending effect on the torsional response of electrostatically actuated micromirrors 

    نوع: Journal Paper
    نویسنده : حمید معین فرد; Mohammad Taghi Ahmadian; Hamid Moeenfard
    سال: 2012
    خلاصه:

    This paper presents analytical solutions for the nonlinear problem of electrostatically actuated torsional micromirrors considering the bending of the torsional beams. First the energy method is used for finding the equilibrium equations...

    Entropy generation analysis of squeeze film air damping in torsional micromirrors 

    نوع: Journal Paper
    نویسنده : ایمان زینلی فامیله; جواد ابوالفضلی اصفهانی; حمید معین فرد; Iman Zeynali; Javad Abolfazli Esfahani; Hamid Moeenfard
    سال: 2015
    خلاصه:

    In the present study, the entropy generation analysis of a torsional micromirror is investigated. Using dynamic mesh method, the governing equations are solved numerically. For three different cases, the geometrical...

    COUPLED BENDING AND TORSION EFFECTS ON THE SQUEEZED FILM AIR DAMPING IN TORSIONAL MICROMIRRORS 

    نوع: Conference Paper
    نویسنده : حمید معین فرد; F. Kaji; M. Taghi Ahmadian; Hamid Moeenfard
    سال: 2012
    خلاصه:

    The current paper presents an analytical model for the problem

    of squeezed film damping in micromirrors considering the

    bending of the supporting torsion microbeams. At the first the

    nonlinear Reynolds equation governing...

    CLOSED FORM SOLUTIONS FOR THE STATICAL BEHAVIOR OF MICROMIRRORS UNDER CAPILLARY FORCES 

    نوع: Conference Paper
    نویسنده : حمید معین فرد; A. Darvishian; M. Taghi Ahmadian; Hamid Moeenfard
    سال: 2011
    خلاصه:

    In this paper, the static behavior of micromirrors under

    the effect of capillary forces is studied. First the

    equation governing the static behavior of micromirrors

    is obtained using both Newton method and minimum...

    BEYOND PULL-IN STABILIZATION OF DUAL AXIS MICROMIRRORS USING FUZZY CONTROLLERS 

    نوع: Conference Paper
    نویسنده : حمید معین فرد; M. Taghi Ahmadian; A. Soroush; A. Alasty; Hamid Moeenfard
    سال: 2010
    خلاصه:

    Dual axis micromirrors are actuated using strongly nonlinear

    electrostatic actuation and their operating range suffers from

    the pull-in problem. So investigation of their dynamics and

    control issues has become a challenge...

    A Coupled Two Degree of Freedom Model for Nano/Micromirrors under van der Waals Force 

    نوع: Conference Paper
    نویسنده : حمید معین فرد; A. Darvishian; M. Taghi Ahmadian; Hamid Moeenfard
    سال: 2012
    خلاصه:

    The current paper presents a two degree of freedom

    model for the problem of nano/micromirrors under the

    effect of vdW force. Energy method, the principal of

    minimum potential energy is employed for finding the...

    CLOSED FORM SOLUTIONS FOR THE PROBLEM OF STATICAL BEHAVIOR OF NANO/MICROMIRRORS UNDER THE EFFECT OF CAPILLARY FORCE AND VAN DER WAALS FORCE 

    نوع: Conference Paper
    نویسنده : A. Darvishian; حمید معین فرد; H. Zohoor; M. Taghi Ahmadian; Hamid Moeenfard
    سال: 2011
    خلاصه:



    Micro/Nano mirrors under the combined effect of

    capillary force and casimir force is obtained using the

    newtons first law of motion. The dependence of the

    critical tilting angle on the physical and geometrical

    parameters of the nano/micromirror...

    ANALYTICAL SOLUTIONS FOR THE STATIC INSTABILITY OF MICRO/NANO MIRRORS UNDER THE COMBINED EFFECT OF CAPILLARY FORCE AND CASIMIR FORCE 

    نوع: Conference Paper
    نویسنده : حمید معین فرد; A. Darvishian; M. Taghi Ahmadian; Hamid Moeenfard
    سال: 2011
    خلاصه:



    Micro/Nano mirrors under the combined effect of

    capillary force and casimir force is obtained. The

    dependency of the critical tilting angle on the physical

    and geometrical parameters of the nano/micromirror and

    its supporting torsional...

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