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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/42784完整後設資料紀錄
| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 黃光裕 | |
| dc.contributor.author | Yu-Hsiu Lee | en |
| dc.contributor.author | 李宇修 | zh_TW |
| dc.date.accessioned | 2021-06-15T01:23:21Z | - |
| dc.date.available | 2011-07-31 | |
| dc.date.copyright | 2009-07-31 | |
| dc.date.issued | 2009 | |
| dc.date.submitted | 2009-07-23 | |
| dc.identifier.citation | [1] 賴耿陽，“超音波工學理論實務”，復漢出版社，2001
[2] Smith, W.F.,“Foundations of Materials Science and Engineering?,3rd ed., McGraw-Hill, 2004 [3] 美國維基百科相關資料,Paul Langevin, http://en.wikipedia.org/wiki/Paul_Langevin [4] 日本 Tamura 公司相關技術資料,Electronic components, http://www.tamura-ss.co.jp/en/electronics/ceramics.html#06 [5] Grandia, W.A., Fortunko, C.M.,“NDE Applications of Air-Coupled Ultrasonic Transducers”, IEEE Ultrasonics Symposium, 1995, pp. 697-709. [6] Shindel, D.W. et al.,U.S. Patent 5287331, Feb 15, 1994. [7] Ladabaum, B.T. et al.,“ Micromachined Ultrasonic Transducers (MUTs)”, IEEE Ultrasonics Symposium, 1995, pp. 501-504. [8] Naudascher, E. and Rockwell,“Flow-Induced Vibrations: An Engineering Guide”, Taylor and Francis Ltd., 2007. [9] Chen, S.S., and Wambsganns, M.W.,“Parallel flow induced vibration of fuel rods.”, Nuclear Engineering Design, Vol. 18, 1972, p. 253 [10] Aguirre, J.E.,“Flow-induced, in-line vibrations of a circular cylinder.” Dissertation, Imperial College of Science and Technology, London, 1977. [11] Rockwell, D. and Naudascher E.,“Self-sustained oscillations of impinging shear layers.”, Annual Review of Fluid Mechanics, Vol. 11, 1979, p. 67. [12] Fletcher, N.H.,“Excitation mechanisms in woodwind and brass instruments.”Acoustica, vol. 43, 1979, p.63 [13] McCroskey, W.J.,“Some current research in unsteady dynamics. -The 1976 Freeman Scholar Lecture.”ASME Journal Fluids Eng., Vol. 99, 1977, p. 8. 67 [14] Fleeter, S.,“Aeroelasticity research for turbomachine applications.”AIAA dynamics specialist conference, San Diego, California (March 24-25), 1977, pp. 77-437 [15] Dory, J.,U.S. Patent 3089458, May 14, 1963. [16] Vios, M.,U.S. Patent 3385392, May 28, 1968. [17] Raida et al.,U.S. Patent 6016351, Jan. 18, 2000. [18] Dulaney, R.O.,U.S. Patent 2786451, March 26, 1957. [19] Anderson, U.S. Patent 4018291, Apr. 19, 1977. [20] Reynold, O., “On the Theory of Lubrication and Its Application to Mr. Beauchamp Tower’s Experiments, Including an Experimental Determination of the Viscosity of Olive Oil”, Philosophical Trans. R. Soc. London, Vol. 177, 1886, pp.157-234. [21] Licht, L., Fuller, D.D., and Sternlicht, B.,“Self-Excited Vibration of an Air-Lubricated Thrust Bearing.”, Trans. ASME, vol. 80, 1958, p. 411 [22] Pan, C.H.T.,“Spectral Analysis of Gas Bearing Systems for Stability Studies”, Ninth Midwestern Mechanics Conference, University of Wisconsin, Madison, Wis., August, 1965. [23] Chiang, T. and Pan, C.H.T.,“Refined Solution of Pneumatic Hammer Instability of Inherently Compensated Hydrostatic Thrust Gas Bearings”, MTI-69TR23, March, 1969. [24] Blondeel, E., Snoeys, R., and Devrieze, L.,“Dynamic Stability of Externally Pressurized Gas Bearings?, Journal of Lubrication Technology, vol. 102, 1980, pp. 511-518. [25] Fourka, M., Tian, Y., and Bonis, M.,“Prediction of the stability of air thrust bearings by numerical, analytical and experimental methods?,Wear, vol. 198, 1996, pp. 1-6. 68 [26] 十合普一，“氣體軸受設計”，共立出版株式會社，2002。 [27] Dorf, R.C. and Bishop, R.H.,“Modern Control Systems?,10th ed., Prentice Hall, 2007 [28] Fourka, M. and Bonis, M.,“Comparison between externally pressurized gas thrust bearings with different orifice and porous feeding systems?, Wear, vol. 210, 1997, pp. 311-317. [29] Talukder, H.M. and Stowell, T.B.,“Pneumatic hammer in an externally pressurized orfice-compensated air journal bearing?, Tribology International, vol. 36, 2003, pp. 585-591. [30] Boffey, D. A., Duncan, A. E., and Deardent, J. K.,”An experimental investigation of the effect of orifice restrictor sieze on the stiffness of an industrial air lubricated thrust bearing”, Tribology, 1981, pp. | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/42784 | - |
| dc.description.abstract | 傳統高頻振動器多使用壓電效應或磁變形效應的原理。電氣式振動器的熱效應一直是為人詬病的特性。本論文利用氣體自我降溫的特點，以氣體軸承氣壓致振的原理，開發設計小型、高功率輸出、高效率的高頻振動器。設計上使用兩個對向配置的軸向氣體軸承，將其間的致動件來回推擠，利用微小氣膜間隙下氣體可壓縮性所產生的不穩定現象，使致動件產生振動的效果。性能分析透過理論計算與有限元素模擬，對承載力、剛性與激振頻率作出預測；實驗則包含無負載、負載特性的量測，最後透過振動影響參數質量和彈簧負載的調整，提出具體設計改良。實驗成果驗證了氣鎚現象作為氣壓式振動器原理的可行性，系統為一直徑30mm、高31mm 之圓柱體結構，測試頻率最高為5.4kHz，供氣壓力4bar 時質量負載可達1kg，最高有65%的能量轉換效率和66W 的功率輸出，經由設計改良，振動器的性能可獲得進一步的提升。 | zh_TW |
| dc.description.abstract | Most conventional high-frequency vibrators generate the working power based
on the piezoelectric and magnetostrictive effects. After entering the transducing system, the input time-varying electric energy will then be transferred into solid-body vibration; however, the heat dissipated has always been a critical issue of such vibrators. Therefore, the objective of this research was to develop a miniature high-frequency vibrator with high power output and high energy efficiency, which took advantage of the self-cooling property of gas and the pneumatic instability to trigger the vibration motion. Two aerostatic bearings were placed in the opposite configuration with the driven part oscillating back and forth due to the pneumatic hammer phenomenon. Full analysis was done by both theoretical calculation and finite element method. Predictions of load capacity, equivalent stiffness, and excited vibrating frequency were all proved possible and applicable while measurements of the unloading and loading characteristics of the vibrator were carried out by experiments. Besides, parameters including driven mass and spring loading effect were examined to a thorough understanding. In the end, modifications for the designed vibrator were proposed to acquire better system performance. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-15T01:23:21Z (GMT). No. of bitstreams: 1 ntu-98-R96522613-1.pdf: 4214096 bytes, checksum: d2d414b307f327e02123d2b59347a196 (MD5) Previous issue date: 2009 | en |
| dc.description.tableofcontents | 口試審定書……………………………………………………………………...……..I
誌謝............................................................................................................................... I 中文摘要......................................................................................................................III 英文摘要......................................................................................................................IV 圖目錄........................................................................................................................ VII 表目錄..........................................................................................................................XI 符號表........................................................................................................................ XII 第一章. 緒論............................................................................................................1 1.1. 研究動機與背景........................................................................................1 1.2. 文獻回顧....................................................................................................2 1.2.1. 壓電式振動器................................................................................3 1.2.2. 磁變形振動器................................................................................4 1.2.3. 其他電氣式振動器........................................................................5 1.2.4. 氣壓式和液壓式振動器................................................................5 1.2.5. 高頻振動器之性能指標..............................................................10 1.3. 研究目標與內容簡介..............................................................................11 第二章. 氣致振動原理..........................................................................................12 2.1. 氣鎚現象..................................................................................................12 2.2. 氣鎚振動之理論分析..............................................................................14 2.3. 氣鎚振動器之設計要求..........................................................................18 第三章. 對向式氣鎚振動器之設計開發..............................................................19 3.1. 氣鎚振動器之負載能力與剛性..............................................................19 3.2. 氣鎚振動之激發條件..............................................................................23 3.3 節流器尺寸的影響探討..........................................................................30 3.4 對向式氣鎚振動器之實體化設計..........................................................34 3.3.3 實驗化設計..........................................................36 第四章. 系統性能檢測..........................................................................................41 4.1 無負載特性量測......................................................................................41 4.2 負載特性..................................................................................................52 4.3 振動影響參數之探討..............................................................................54 4.3.1 致動質量效應探討......................................................................54 4.3.2 彈簧負載效應探討......................................................................56 4.3.3 對向式氣鎚振動器之設計改良..................................................60 第五章. 結論與未來展望......................................................................................64 參考文獻......................................................................................................................66 附錄A 流量計特性規格(GFM 37) .......................................................................69 附錄B 光纖位移計特性規格(MTI 2100).............................................................71 附錄C 美商國家儀器PXI 訊號處理器(PXI-1002).............................................73 附錄D Tektronix 多功能示波器(TDS 2002 B) ....................................................74 | |
| dc.language.iso | zh-TW | |
| dc.subject | 氣鎚效應 | zh_TW |
| dc.subject | 振動器 | zh_TW |
| dc.subject | 流體激振 | zh_TW |
| dc.subject | 超音波換能器 | zh_TW |
| dc.subject | 氣靜壓軸承 | zh_TW |
| dc.subject | vibrators | en |
| dc.subject | pneumatic hammer | en |
| dc.subject | aerostatic bearings | en |
| dc.subject | ultrasonic transducers | en |
| dc.subject | flow-induced vibrations | en |
| dc.title | 微型氣壓振動器之設計開發與性能研究 | zh_TW |
| dc.title | Design and Research of a Miniature Pneumatic Vibrator | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 97-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 蔡得民,林沛群 | |
| dc.subject.keyword | 振動器,流體激振,超音波換能器,氣靜壓軸承,氣鎚效應, | zh_TW |
| dc.subject.keyword | vibrators,flow-induced vibrations,ultrasonic transducers,aerostatic bearings,pneumatic hammer, | en |
| dc.relation.page | 75 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2009-07-24 | |
| dc.contributor.author-college | 工學院 | zh_TW |
| dc.contributor.author-dept | 機械工程學研究所 | zh_TW |
| 顯示於系所單位： | 機械工程學系 | |
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