In this paper, the structural behavior of a micro-electromechanical system (MEMS)\ncomposed of two electrically coupled parallel clamped-clamped microbeams is investigated. An Euler\nBernoulli beam model is considered along with the nonlinear electric actuating force to get the\nequation of motion governing the structural behavior of the actuator. A reduced-order modeling\n(ROM) based on the Galerkin expansion technique, while assuming linear undamped mode shapes\nof a straight fixed-fixed beam as the basis functions, is assumed as a discretization technique of the\nequations of motion in this investigation. The results showed that the double-microbeam MEMS\nactuator configuration requires a lower actuation voltage and a lower switching time as compared to\nthe single microbeam actuator. Then, the effects of both microbeams air gap depths were investigated.\nFinally, the eigenvalue problem was investigated to get the variation of the fundamental natural\nfrequencies of the coupled parallel microbeams with the applied actuating DC load.
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