2015 EJRNL PP Hamid M . Sedighi 1.pdf
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Terbatas Irwan Sofiyan
» ITB
Terbatas Irwan Sofiyan
» ITB
A nonlinear frequency-amplitude relation is developed to investigate the vibrational
amplitude effect on the dynamic pull-in instability of double-sided-actuated nano-torsional
switches. The governing equation of a nano-electro-mechanical system pre-deformed by an electric
field contains the quintic nonlinear term. The influences of basic parameters on the pull-in
instability and natural frequency are investigated using a powerful analytical approach called
the homotopy perturbation method. It is demonstrated that two terms in series expansion are
sufficient to produce an acceptable solution. The numerical results obtained have verified the
soundness of the asymptotic procedure. The phase portraits of the double-sided nano-torsionalactuator
exhibit periodic, homoclinic and heteroclinic orbits.