Journal of Applied Nonlinear Dynamics
Existence and Stability of Periodic Solutions of a Shifted CombDrive Finger Actuator
Journal of Applied Nonlinear Dynamics 11(1) (2022) 247269  DOI:10.5890/JAND.2022.03.015
Andr 'es Rivera , Jeremy J. Thibodeaux, Johan S. S 'anchez
Department of Natural Sciences and Mathematics, Pontificia Universidad Javeriana Cali,
760031, CaliColombia
Department of Mathematical Sciences, University of the Virgin Islands
Department of Mathematics and Computer Science, Loyola University New Orleans, New Orleans, LA, USA
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Abstract
The purpose of this article is to analytically prove the exis\tence and linear stability of three $\hat{T}$periodic solutions (two strictly positive and one strictly negative) for a combdrive actuator where the moveable finger is initially shifted a small distance $u>0$ from the center of the two fixed ones. Here we assume a damping force that is proportional to the velocity and an $AC$$DC$ driving voltage $\hat{V}(\tau)>0$ with period $\hat{T}>0$. Under appropriate conditions over $\hat{V}_{\min}:=\min \hat{V}(\tau)$ and $\hat{V}_{\max}:=\max V(\tau)$, one of these solutions will be elliptic and the other two are hyperbolic. The basic tools for proving our results are the Lower and Upper Solution Method, Degree Theory and the LyapunovZukovskii stability criterion for Hill's equation. Some numerical examples are provided to illustrate the results.
Acknowledgments
The authors A. Rivera and J. S. S\'anchez have been financially su\pported by Convocatoria Interna project (2019) No.\,1551. The author J. Thibo\deaux has been financially supported by a grant from the Fulbright U.S. Scholar program.
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