影印機掃瞄器光學驅動模組之振動特性分析

Vibration Characteristics Analysis of Driving Apparatus of Optical System for Photocopier Scanner

黃冠霖(Kuan-Lin Huang)

指導教授 ： 陳政順

國立臺北科技大學/機電學院/製造科技研究所/碩士(2010年)

摘要

本文探討影印機掃瞄器光學驅動模組之振動特性分析，使用有限元素分析軟體ANSYS模擬振動模態與求得自然頻率，光學驅動模組主要架構有兩個反射鏡、兩種不同設計彈簧鋼片與鏡架結構，其鏡架結構底部使用磁鐵固定於軌道上。首先進行鏡架結構之模態分析，結果顯示鏡架結構部份模態振型會使反射鏡產生位移。光學驅動模組分析上，由於鏡架結構與反射鏡之間透過彈簧鋼片施加預壓力固定住，分析在不同預壓力等級下，對整體光學驅動模組機構自然頻率與模態振型之差異，藉此探討影響反射鏡角度與位移的因素。建立之分析模型，將可運用於改善光學驅動模組之振動。

關鍵字

有限元素法 ； 振動 ； 光學驅動模組

並列摘要

This study discusses vibration characteristics of driving apparatus of optical system for photocopier scanner. The commercial finite element analysis software is used to analyze the mode shapes and natural frequencies of the driving apparatus selected. Major components of driving apparatus of optical system are two mirrors, two designs of spring steel and frame, and bottom of the frame is fixed on the track by the magnet. The modal analysis about the frame based on FEM is performed and the natural frequencies obtained are in good agreement with the experimental modal analysis. According to the results, some of the mode shapes of frame will make mirror to deform easily. In the analysis of driving apparatus of optical system, because contact spring elements exert the pre-compressive force on the mirrors to fix to the frame, the mass element and spring element are used to replace the original contact elements. And then, the effects of natural frequency and mode shape under the different pre-compressive force are studied. The results show that the natural frequencies of reflective mirror component are higher than those without pre-compressive force and yield stiffer structure.

並列關鍵字

Finite Element Method ； Vibration ； Driving Apparatus of Optical System

參考文獻

[1]王志宏、許裕成、謝政哲，「影像掃描器之振動研究」，第五屆中華民國振動與噪音工程學會學術研討會，新竹，1997，第247-258頁。

[2]褚靜如，皮帶與滑輪的有限元素模擬，碩士論文，國立成功大學機械工程研究所，台南，2005。

[4]L. Kogut and I. Etsion, "Elastic-Plastic Contact Analysis of a Sphere and a Rigid Flat," ASME Journal of Applied Mechanics., vol. 69, 2002, pp. 657-662.

[5]Lin, L. P., and Lin, J. F., 2006, "A New Method for Elastic-Plastic Contact Analysis of a Deformable Sphere and a Rigid Flat," ASME Journal of Tribology, vol. 128, 2006, pp. 221-229.

[6]周楷翔、傅增棣，「物體接觸變形與磨耗之整合分析」，MSC台灣「虛擬產品研發」技術論壇，天母，2005.