東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

Modeling and dynamics of micromechan...

Sahai, Tuhin.

Linked to FindBook

Google Book

Amazon

博客來

Modeling and dynamics of micromechanical oscillators.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Modeling and dynamics of micromechanical oscillators./
Author:	Sahai, Tuhin.
Description:	136 p.
Notes:	Adviser: Alan Zehnder.
Contained By:	Dissertation Abstracts International69-01B.
Subject:	Applied Mechanics. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3295847
ISBN:	9780549423010

Modeling and dynamics of micromechanical oscillators.
Sahai, Tuhin.

Modeling and dynamics of micromechanical oscillators. - 136 p.

Adviser: Alan Zehnder.

Thesis (Ph.D.)--Cornell University, 2008.

Micromechanical oscillators, due to their small mass and low damping, display a rich range of behavior rarely seen in macroscopic structures. Examples include multiple parametric resonances, optically driven limit cycles, entrainment, tunability, super- and sub- harmonic resonances. These devices have potential applications in signal processing, pattern recognition and mass sensing to name a few. This thesis is an attempt to build accurate models for micromechanical oscillators. A first principle (continuum) approach is adopted to model these oscillators (primarily using ideas from continuum mechanics). We use the resulting models to analyze and study the dynamics of these oscillators.

ISBN: 9780549423010Subjects--Topical Terms:

1018410
Applied Mechanics.

Modeling and dynamics of micromechanical oscillators.
LDR:03338nam 2200301 a 45 001 940728
005 20110518
008 110518s2008 ||||||||||||||||| ||eng d
020 $a 9780549423010
035 $a (UMI)AAI3295847
035 $a AAI3295847
040 $a UMI $c UMI
100 1 $a Sahai, Tuhin. $3 1264858
245 1 0 $a Modeling and dynamics of micromechanical oscillators.
300 $a 136 p.
500 $a Adviser: Alan Zehnder.
500 $a Source: Dissertation Abstracts International, Volume: 69-01, Section: B, page: 0402.
502 $a Thesis (Ph.D.)--Cornell University, 2008.
520 $a Micromechanical oscillators, due to their small mass and low damping, display a rich range of behavior rarely seen in macroscopic structures. Examples include multiple parametric resonances, optically driven limit cycles, entrainment, tunability, super- and sub- harmonic resonances. These devices have potential applications in signal processing, pattern recognition and mass sensing to name a few. This thesis is an attempt to build accurate models for micromechanical oscillators. A first principle (continuum) approach is adopted to model these oscillators (primarily using ideas from continuum mechanics). We use the resulting models to analyze and study the dynamics of these oscillators.
520 $a In the first part of this thesis, we report a thermally induced transition in the resonant response of the first translation mode in a prestressed doubly-clamped beam. To understand this transition, the mode of the beam is modeled using an ODE model that captures mechanical and thermal aspects of the problem. Finite element and nonlinear mechanics approaches are used to extract parameters of the model. Perturbative and numerical approaches are then used to analyze the model developed. It is found in this work that the detection mechanism can play a very crucial role in the dynamics of micromechanical oscillators. Since micron-scaled devices have very low mass and damping, the detection mechanism alters the dynamics in profound and sometimes counter-intuitive ways.
520 $a In the second part of the thesis we propose a feasible approach to building coupled micromechanical oscillators. We pick dome oscillators as an example. A model for these oscillators is built by performing a Galerkin projection on the governing von Karman equations. We then perform a bifurcation analysis of the model and study the ability of coupled oscillators to synchronize. This work forms the first steps to analyze the feasibility of making resonant clock networks, data storage devices and neurocomputers.
520 $a Even though we have picked particular examples of oscillators to model and study, the overall approach, numerical and perturbative methods used are more encompassing in their applications. Further, similar micromechanical oscillators are expected to have similar dynamics. The main message we want the reader to take away is that without accurate models of micromechanical oscillators important dynamics may be missed; which can be detrimental for design and usability purposes.
590 $a School code: 0058.
650 4 $a Applied Mechanics. $3 1018410
690 $a 0346
710 2 $a Cornell University. $3 530586
773 0 $t Dissertation Abstracts International $g 69-01B.
790 $a 0058
790 1 0 $a Zehnder, Alan, $e advisor
791 $a Ph.D.
792 $a 2008
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3295847