DC 欄位 | 值 | 語言 |
dc.contributor | 張建成 | zh-TW |
dc.contributor | Chu, Chin-Chou;Chang, Chien-Cheng | en |
dc.contributor | 臺灣大學:應用力學研究所 | zh-TW |
dc.contributor.author | 林裕昇 | zh-TW |
dc.contributor.author | Lin, Yu-Sheng | en |
dc.creator | 林裕昇 | zh-TW |
dc.creator | Lin, Yu-Sheng | en |
dc.date | 2009 | en |
dc.date.accessioned | 2010-05-18T04:51:03Z | - |
dc.date.accessioned | 2018-06-29T00:15:46Z | - |
dc.date.available | 2010-05-18T04:51:03Z | - |
dc.date.available | 2018-06-29T00:15:46Z | - |
dc.date.issued | 2009 | - |
dc.identifier.other | U0001-2907200914263100 | en |
dc.identifier.uri | http://ntur.lib.ntu.edu.tw//handle/246246/183531 | - |
dc.description.abstract | 對於薄殼類型之結構的分佈控制,必須要有效的致動和動態析。本研究是估算片段分佈的電-機械性質的壓電薄殼感測器用在環薄殼。由於感測器的訊號是模態決定,所以必須先學習然模態的特性而且特別強調於環向之模態。其次,在分佈片段感測器使用分割的技巧且設計不同的長度,使得藉著模態形變估算訊號。此,全部的輸出訊號總共包含了四個部份:1)環向之振動振幅所造成彎曲應變而感生訊號,2)徑向之振動的振幅所造成曲應變而感生訊號,3)環向之振動的振幅所造成膜應變而感生號,4)徑向之振動的振幅所造成膜應變而感生訊號。膜應變與曲應變主要分別由環向與徑向之自然頻率伴隨而生。所以感測的敏感度可以在分成:1)徑向型態敏感度與2)環向型態敏感。用參數學習(例如:環的半徑、感測器的厚度、環的厚度片段感測器的大小)而引導計算出在自然振動之下,所產生在的壓電片感測器所得之訊號。所有的資料指示著,產生的總訊主要是由環向分量貢獻為較多,而不是徑向分量。次,在環薄殼上包覆致動層,藉著推導致動片之控制效,瞭解在徑向模式時,彎曲控制效應支配整個控制效應,反之環向模式時,膜控制效應會是主要控制效應的主幹。後,使用參數學習(例如:環的半徑、致動器的厚度、環厚度和片段致動器的大小與施加電壓大小)而瞭解這些幾何參影響控制效應之大小。 | zh-TW |
dc.description.abstract | Distributed monitoring is essential to effective actuation andibration control of shell-type structures. In this thesis, electro-mechanicsf the segmented distributed piezoelectric shell sensors applied to ringhells are evaluated. Since sensor signals are modal dependent, naturalodal characteristics, emphasizing the circumferential mode, are studiedirst. Then, with the segmentation technique, distributed segmentedensors with various lengths are designed and their signal generationsesulting from modal strains are evaluated.he total output signal includes four components: 1) a bending strainnduced signal by the circumferential oscillatory amplitude, 2) a bendingtrain induced signal by the transverse oscillatory amplitude, 3) aembrane strain induced signal by the circumferential oscillatorymplitude and 4) a membrane strain induced signal by the transversescillatory amplitude respectively at the transverse and circumferentialomponent frequencies. Furthermore, the sensor sensitivities are dividednto: 1) the transverse modal sensitivity and 2) the circumferential modalensitivity.arametric studies (e.g., ring radius, sensor thickness, ring thicknessnd sensor segment length) are conducted to evaluate the spatial signalistributions and component signal generations of segmented ring sensors.ll data indicate that ring’s circumferential, not transverse, componentode dominates the total signal generation.hen, distributed control actions induced by electrostrictive actuatoregments are evaluated the total effect can be divided into twoicroscopic control actions: the circumferential membrane and bendingontrol actions. The bending control action in total control action is majorontribution at the transverse mode. The membrane control action in totalIontrol actions is major contribution at the circumferential mode.inally, parametric studies (e.g., ring radius, actuator thickness, ringhickness, actuator segment length and applied voltage) are conducted tovaluate control effect. | en |
dc.description.tableofcontents | 目錄試委員審定書........................................................................................ I謝............................................................................................................II要.......................................................................................................... IIIBSTRACT..............................................................................................V錄.........................................................................................................VII目錄...................................................................................................... IX目錄................................................................................................... XIV1 章 序論..............................................................................................1.1 引言..................................................................................................1.2 介紹..................................................................................................4.3 研究範圍..........................................................................................52 章 環之結構與震動分析理論..........................................................7.1 樂夫(LOVE)方程式..........................................................................7.2 深薄殼方程式................................................................................14.2.1 膜作用力(Membrane Forces).................................................15.2.2 彎曲力距(Bending Moments)................................................16.3 環薄殼運動方程式........................................................................16.4 環薄殼之自然振動分析................................................................183 章 環之感測器................................................................................21.1 感測器之輸出訊號........................................................................21.2 感測器之分割技術........................................................................24.3 感測器之敏感度............................................................................274 章 環之致動器................................................................................29.1 分佈電滯性致動片之控制力........................................................30.2 分佈致動器控制效應....................................................................32.3 環薄殼之致動器............................................................................36.4 致動器之效應................................................................................395 章 結果與討論................................................................................42.1 自然頻率與振幅比........................................................................45.2 模態型式........................................................................................48.3 環之壓電片感測器的輸出訊號....................................................57.4 敏感度分析....................................................................................72.5 環之電滯性致動器控制效應........................................................826 章 總結..........................................................................................102 | en |
dc.format | application/pdf | en |
dc.format.extent | 1918392 bytes | - |
dc.format.mimetype | application/pdf | - |
dc.language | zh-TW | en |
dc.language.iso | en_US | - |
dc.subject | 環向模態 | zh-TW |
dc.subject | 徑向模態 | zh-TW |
dc.subject | 分割技巧 | zh-TW |
dc.subject | 彎曲應變感生訊號 | zh-TW |
dc.subject | 膜應變感生訊號 | zh-TW |
dc.subject | 感測器敏感度總產生訊號 | zh-TW |
dc.subject | 彎曲控制效應 | zh-TW |
dc.subject | 膜控制效應 | zh-TW |
dc.subject | Circumferential modal | en |
dc.subject | transverse modal | en |
dc.subject | segmentation technique | en |
dc.subject | bending strain induced signal | en |
dc.subject | membrane strain induced signal | en |
dc.subject | sensor sensitivity | en |
dc.subject | total signal generation | en |
dc.subject | bending control action | en |
dc.subject | membrane control action | en |
dc.title | 片段環感測器之模態敏感度的空間訊號分佈及片段環動器的控制效應 | zh-TW |
dc.title | Modal sensitivities, spatial signal distribution andverage of segmented ring sensors and control effect ofegmented ring actuators | en |
dc.type | thesis | en |
dc.identifier.uri.fulltext | http://ntur.lib.ntu.edu.tw/bitstream/246246/183531/1/ntu-98-R95543031-1.pdf | - |
item.languageiso639-1 | en_US | - |
item.fulltext | with fulltext | - |
item.grantfulltext | open | - |
item.openairetype | thesis | - |
item.openairecristype | http://purl.org/coar/resource_type/c_46ec | - |
item.cerifentitytype | Publications | - |
顯示於: | 應用力學研究所
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