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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 舒貽忠 | zh_TW |
| dc.contributor.advisor | Yi-Chung Shu | en |
| dc.contributor.author | 戴煒宸 | zh_TW |
| dc.contributor.author | Wei-Chen Tai | en |
| dc.date.accessioned | 2024-02-26T16:20:50Z | - |
| dc.date.available | 2024-02-27 | - |
| dc.date.copyright | 2024-02-26 | - |
| dc.date.issued | 2022 | - |
| dc.date.submitted | 2002-01-01 | - |
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Smart Materials and Structures, 18: 025009, 2009. | - |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/91897 | - |
| dc.description.abstract | 本研究主要利用類神經網路(Artificial Neural Network, ANN)以及基於物理信息神經網路(Physics Informed Neural Network, PINN)進行壓電能量擷取振子之參數反算研究。當輸出功率之解析解為已知時，類神經網路可藉由內含壓電參數之解析解與不同電路負載下的實驗數據所構成的損失函數進行訓練。但是絕大部分物理模型的解析解難以取得，因此必須採用基於物理信息神經網路。該神經網路損失函數包含了基於物理模型的微分方程以及實驗所得的時域電壓訊號。研究結果顯示，類神經網路能夠替代人力且大幅降低曲線擬合時間，並識別出機械阻尼比、外力振動大小以及壓電電容值。此外，基於物理信息神經網路在含有雜訊模擬訊號的訓練下，能夠準確的識別出機械阻尼比、外力振動大小以及力電耦合係數，展現了其在有限的實驗數據下的優勢，並將於未來的研究中證實。 | zh_TW |
| dc.description.abstract | The thesis studies the inverse parametric identifications in a piezoelectric energy harvester based on the artificial neural network (ANN) and the physics informed neural network (PINN). The former is suitable when the analytic estimate of power is available in terms of device parameters. Thus, ANN can be trained by assigning the loss functions consisting of the analytic formula of power estimate as well as the experimental data of power against various electric loads. The latter approach is suitable when the formula of power estimate is unavailable. Under this circumstance, the loss functions contain two parts: the first is the model-based differential equations and the second is the experimental data of time waveforms of voltage signals. The results show that the ANN approach is capable of replacing the curve fitting which requires significant labor efforts in identifying mechanical damping ratio, voltage source magnitude and piezoelectric capacitance. In addition, the PINN approach trained on noisy simulated data accurately identifies the parameters of mechanical damping ratio, voltage source magnitude and electromechanical coupling factor. It provides an advantage of extracting limited amount of experimental data and will be demonstrated in the future work. | en |
| dc.description.provenance | Submitted by admin ntu (admin@lib.ntu.edu.tw) on 2024-02-26T16:20:50Z No. of bitstreams: 0 | en |
| dc.description.provenance | Made available in DSpace on 2024-02-26T16:20:50Z (GMT). No. of bitstreams: 0 | en |
| dc.description.tableofcontents | 論文口試委員審定書 i 誌謝 ii 中文摘要 iv ABSTRACT v 目錄 vi 圖目錄 ix 表目錄 xii Chapter 1 導論 1 1.1 研究動機 1 1.2 文獻回顧 3 1.3 論文架構 12 Chapter 2 基於物理信息神經網路介紹 13 2.1 機器學習與神經網路 13 2.1.1 多層感知器(Multilayer Perceptron, MLP) 15 2.1.2 激活函數(Activation Function) 16 2.1.3 損失函數(Loss Function) 18 2.1.4 反向傳播算法(Backpropagation Algorithm) 18 2.2 基於物理信息神經網路 19 2.2.1 熱傳導方程式(Heat Equation) 20 2.2.2 柏格斯方程式(Burgers' Equation) 23 2.2.3 反算問題：以阻尼自由振動方程式為例 26 Chapter 3 壓電效應與理論模型 29 3.1 壓電效應 29 3.1.1 正壓電效應 29 3.1.2 逆壓電效應 30 3.2 壓電懸臂樑之等效電路模型 31 3.3 單軸向往復式激振實驗之輸出功率分析 33 3.4 無因次化壓電統御方程式 35 3.5 無因次化方程式之穩態解析解推導 38 Chapter 4 利用類神經網路輔助壓電參數提取 41 4.1 壓電振子等效參數之曲線擬合方法 41 4.2 類神經網路應用於參數反算 43 4.2.1 神經網路架構實現 43 4.2.2 神經網路輸出結果 45 Chapter 5 基於物理信息神經網路應用於壓電參數反算 49 5.1 基於物理信息神經網路架構實現 49 5.2 基於物理信息神經網路輸出結果 52 Chapter 6 結論與未來展望 59 6.1 結論 59 6.2 未來展望 60 附錄 61 參考文獻 63 | - |
| dc.language.iso | zh_TW | - |
| dc.title | 基於物理信息神經網路進行壓電能量擷取振子之參數反算研究 | zh_TW |
| dc.title | Parameter Identification of a Piezoelectric Harvester Based on Physics Informed Neural Network | en |
| dc.type | Thesis | - |
| dc.date.schoolyear | 110-2 | - |
| dc.description.degree | 碩士 | - |
| dc.contributor.oralexamcommittee | 陳志鴻;林哲宇 | zh_TW |
| dc.contributor.oralexamcommittee | Chih-Hung Chen;Che-Yu Lin | en |
| dc.subject.keyword | 類神經網路,基於物理信息神經網路,參數反算問題,壓電能量擷取振子,振動反算問題, | zh_TW |
| dc.subject.keyword | artificial neural network (ANN),physics informed neural network (PINN),inverse parametric identification,piezoelectric energy harvester,vibration inverse problem, | en |
| dc.relation.page | 70 | - |
| dc.identifier.doi | 10.6342/NTU202200931 | - |
| dc.rights.note | 未授權 | - |
| dc.date.accepted | 2022-07-27 | - |
| dc.contributor.author-college | 工學院 | - |
| dc.contributor.author-dept | 應用力學研究所 | - |
| 顯示於系所單位： | 應用力學研究所 | |
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