Nayfeh A.H. – TechConnect Briefs

Tuning of a MEMS RF Filter

Hammad B.K., Abdel-Rahman E.M., Nayfeh A.H., Virginia Polytechnic Institute and State University, US

We present an analytical model and use it to find closed-form expressions describing the response of a tunable MEMS RF filter. The filter is made of two identical clamped-clamped micro-beams suspended over input and output [...]

Dynamic Simulations of a Novel RF MEMS Switch

Younis M.I., Abdel-Rahman E.M., Nayfeh A.H., Virginia Tech, US

We present a dynamic analysis of a novel RF MEMS switch utilizing the dynamic pull-in phenomenon. We study this phenomenon and present guidelines about its mechanism. We propose to utilize this phenomenon to design a [...]

A Model for Thermoelastic Damping in Microplates

Nayfeh A.H., Younis M.I., Virginia Tech, US

We present a model and analytical expressions for the quality factors of microplates due to thermoelastic damping. We solve the heat equation for the thermal current across the thickness of a microplate, and hence decouple [...]

Microplate Modeling under Coupled Structural-Fluidic-Electrostatic Forces

Younis M.I., Nayfeh A.H., Virginia Tech, US

We present a model for the dynamic behavior of microplates under the coupled effects of squeeze-film damping, electrostatic actuation, and mechanical forces. The model simulates the dynamics of microplates and predicts their quality factors under [...]

Dynamic Simulation of an Electrostatically Actuated Impact Microactuator

Zhao X., Dankowicz H., Reddy C.K., Nayfeh A.H., Virginia Tech, US

We study the dynamics of an electrostatically driven impact microactuator reported by Mita and associates. The microactuator is modeled as a two-degree-of-freedom rigid multibody system. The impact phenomenon is described by a simple impact law [...]

Superharmonic Resonance of an Electrically Actuated Resonant Microsensor

Abdel-Rahman E.M., Nayfeh A.H., Virginia Polytechnic Institute and State University, US

We investigate the response of a microbeam-based resonant sensor to a superharmonic electric actuation. The model incorporates the nonlinearities associated with moderately large displacements and electric forces. The method of multiple scales is used to [...]

Superharmonic Resonance of an Electrically Actuated Resonant Microsensor

Abdel-Rahman E.M., Nayfeh A.H., Virginia Polytechnic Institute and State University, US

We investigate the response of a microbeam-based resonant sensor to a superharmonic electric actuation. The model incorporates the nonlinearities associated with moderately large displacements and electric forces. The method of multiple scales is used to [...]