Development And Analysis Of Linear Resonant Scanner With Torsional Mechanism

Large size mirror scanners are needed in several scanning technologies such as, ultra short-throw projector, free-space optical communications and barcode scanner. Several researches on large size mirror in microelectromechanical systems (MEMS) scanner were conducted. For instance, research on micro...

Full description

Saved in:

Bibliographic Details
Main Author:	Koay, Loke Kean
Format:	Thesis
Language:	English
Published:	2013
Subjects:	TJ1-1570 Mechanical engineering and machinery
Online Access:	http://eprints.usm.my/36925/1/KOAY_LOKE_KEAN_24_Pages.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-usm-ep.36925
record_format	uketd_dc
spelling	my-usm-ep.369252019-04-12T05:26:18Z Development And Analysis Of Linear Resonant Scanner With Torsional Mechanism 2013 Koay, Loke Kean TJ1-1570 Mechanical engineering and machinery Large size mirror scanners are needed in several scanning technologies such as, ultra short-throw projector, free-space optical communications and barcode scanner. Several researches on large size mirror in microelectromechanical systems (MEMS) scanner were conducted. For instance, research on micromachined polysilicon microscanners has been performed for barcode scanner. However, the curvature of the microscanners causes image distortion. Furthermore, high operation voltages of the MEMS scanner deter the usage of MEMS scanner in hand-held applications. In this research, a linear resonant scanner consisting of an electronically driven mechanically-resonant torsional spring-mirror system was developed for display applications. The scanner was designed according to the functional components such as compliant structure and actuator. The torsional spring which is the compliant structure was modeled with finite element analysis (FEA) and geometry studies were conducted. The optimized torsional spring with the lowest stress level was selected for the design. The actuator of air core coil (ACC) was used in the scanner; geometry study was used to maximize the magnetic forces of the ACC. The ACC of with minimum length, minimum inner radius and maximum outer radius was used. Besides, experimental analysis and FEA of the scanner showed that resonant frequency, angular displacement and stress level are affected by the magnet position on the suspended plate. After the scanner design, several characteristic studies were conducted. A nonlinear damping model is proven to be able to analyze and predict the free vibration response of the scanner based on experimental results. xxx The damping model is able to accommodate the frequency perturbation which happens when the scanner mounting is changed. The hysterical frequency response on the large scale torsional spring mechanism is first found in this research work. Furthermore, the relationship between scanning angle and driving frequency was employed for extra mechanical gain. The proposed resonant scanner extends the ability of the torsional mechanism scanner for large angular displacement of 87.1o with low voltage input of 5 V. 2013 Thesis http://eprints.usm.my/36925/ http://eprints.usm.my/36925/1/KOAY_LOKE_KEAN_24_Pages.pdf application/pdf en public phd doctoral Universiti Sains Malaysia Pusat Pengajian Kejuruteraan Mekanik
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	TJ1-1570 Mechanical engineering and machinery
spellingShingle	TJ1-1570 Mechanical engineering and machinery Koay, Loke Kean Development And Analysis Of Linear Resonant Scanner With Torsional Mechanism
description	Large size mirror scanners are needed in several scanning technologies such as, ultra short-throw projector, free-space optical communications and barcode scanner. Several researches on large size mirror in microelectromechanical systems (MEMS) scanner were conducted. For instance, research on micromachined polysilicon microscanners has been performed for barcode scanner. However, the curvature of the microscanners causes image distortion. Furthermore, high operation voltages of the MEMS scanner deter the usage of MEMS scanner in hand-held applications. In this research, a linear resonant scanner consisting of an electronically driven mechanically-resonant torsional spring-mirror system was developed for display applications. The scanner was designed according to the functional components such as compliant structure and actuator. The torsional spring which is the compliant structure was modeled with finite element analysis (FEA) and geometry studies were conducted. The optimized torsional spring with the lowest stress level was selected for the design. The actuator of air core coil (ACC) was used in the scanner; geometry study was used to maximize the magnetic forces of the ACC. The ACC of with minimum length, minimum inner radius and maximum outer radius was used. Besides, experimental analysis and FEA of the scanner showed that resonant frequency, angular displacement and stress level are affected by the magnet position on the suspended plate. After the scanner design, several characteristic studies were conducted. A nonlinear damping model is proven to be able to analyze and predict the free vibration response of the scanner based on experimental results. xxx The damping model is able to accommodate the frequency perturbation which happens when the scanner mounting is changed. The hysterical frequency response on the large scale torsional spring mechanism is first found in this research work. Furthermore, the relationship between scanning angle and driving frequency was employed for extra mechanical gain. The proposed resonant scanner extends the ability of the torsional mechanism scanner for large angular displacement of 87.1o with low voltage input of 5 V.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Koay, Loke Kean
author_facet	Koay, Loke Kean
author_sort	Koay, Loke Kean
title	Development And Analysis Of Linear Resonant Scanner With Torsional Mechanism
title_short	Development And Analysis Of Linear Resonant Scanner With Torsional Mechanism
title_full	Development And Analysis Of Linear Resonant Scanner With Torsional Mechanism
title_fullStr	Development And Analysis Of Linear Resonant Scanner With Torsional Mechanism
title_full_unstemmed	Development And Analysis Of Linear Resonant Scanner With Torsional Mechanism
title_sort	development and analysis of linear resonant scanner with torsional mechanism
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Kejuruteraan Mekanik
publishDate	2013
url	http://eprints.usm.my/36925/1/KOAY_LOKE_KEAN_24_Pages.pdf
_version_	1747820651669880832

Development And Analysis Of Linear Resonant Scanner With Torsional Mechanism

Similar Items