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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 黃鼎偉(Ding-Wei Huang) | |
dc.contributor.author | Tzu-Yun Lin | en |
dc.contributor.author | 林子耘 | zh_TW |
dc.date.accessioned | 2021-06-16T10:32:56Z | - |
dc.date.available | 2020-08-14 | |
dc.date.copyright | 2013-08-20 | |
dc.date.issued | 2013 | |
dc.date.submitted | 2013-08-14 | |
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dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/60848 | - |
dc.description.abstract | 本篇論文是利用太陽光頻譜配對的的觀點(Spectrum Matching Strategy)來最佳化動態混色的 LED 智慧照明系統,將以往需要非 線性最佳化的參數如演色性、色溫等,利用頻譜配對觀點轉換為 線性最小平方估計的問題。本論文中討論了四種演算法,梯度遞 減法(Gradient Method)、遞迴式奇異值分解法 (Recursive Singular Value Decomposition, RSVD)、非負最小平方估計法 (Non-negative Least Squares, NNLS) 以及自適應直接搜尋法 (Mesh Adaptive Direct Search, MADS),來求最小平方估計的解。其中梯度遞減法是最直觀地解決最 小平方估計的方法,然而很容易被限制在局部最小值,而遞迴式奇異 值分解法具有節省空間及時間的效果,然而無法有效解決非負解的問 題。約束最佳化模式搜尋法結果最為精準,可以達到平均演色性 97 以 上,色溫及照度幾乎零誤差的發光表現,然而約束最佳化模式搜尋法 需要大量的時間空間,並且很難實現於一般嵌入式系統。比較之間的 準確度與好壞度並且衡量各個演算法的需求時間和空間,再加上色溫 修正和有效的系統設計,最後選擇利用非負最小平方估計法為最適合 使用於動態混色 LED 照明系統,並且以 Kim、Sra 和 Dhillon 所提出的 新型投影式類牛頓法實現,可以在節省時間和空間的條件下得到相對 最佳解。本篇論文提出的所有方法及結果都模擬於 MATLAB 平台。未 來希望能將本論文方法實現於嵌入式系統,除了繼續最佳化演算法的 時間空間利用之外,也希望能開發出獨特的人機介面,以達到真正的 智慧照明。 | zh_TW |
dc.description.abstract | This thesis presents a first-of-its-kind approach and simulation of multi-chromatic LED-based dynamic lighting system that the lighting performance can be optimized by itself to less than 5% error. In this work, though the parameters we want to optimize should be calculated nonlinearly, the control of the different LEDs is formulated as a linear optimization problem via the spectrum matching strategy, which is a new way to think how to optimize a dynamic lighting system. Instead of optimizing each parameter directly, here we provide a much more time-saving and space-saving way to optimize the color rendering index, correlated color temperature and luminous flux. Consequently the lighting system can dynamically optimize the light output for greater controllability, higher color quality and luminous flux. The algorithm is also chosen from lots of studies from machine learning, computer science to numerical recipe and implemented into MATLAB to simulate the entire system. In summary, this thesis provides the foundation for future research in the areas of the spectral mixture lighting system model, efficient lighting control, dynamic utility regulation and optimization. | en |
dc.description.provenance | Made available in DSpace on 2021-06-16T10:32:56Z (GMT). No. of bitstreams: 1 ntu-102-R00941034-1.pdf: 2203490 bytes, checksum: 4232f36cd454b4008fa0c03e599a7e7c (MD5) Previous issue date: 2013 | en |
dc.description.tableofcontents | Chap 1 Introduction 1
1.1 Motivation.................................. 1 1.2 Contribution............................... 2 Chap 2 Dynamic Lighting System 3 2.1 Solid State Lighting..................... 3 2.2 White Light using LEDs ............... 4 2.3 Smart Lighting ............................ 8 2.4 Spectrally TunableLighting .......... 9 2.5 Dynamic Lighting......................... 11 Chap 3 System Modeling 13 3.1 Problem Definition....................... 13 3.1.1 Spectrum Matching Strategy(SMS)................ 13 3.1.2 Mathematical Model ........................ 15 3.1.3 Overdetermined System ...................... 16 3.2 Optimization Approaches.......................... 18 3.2.1 Gradient DescentMethod ..................... 19 3.2.2 Singular Value Decomposition(SVD) ......................21 3.2.3 Mesh Adaptive Direct Search Algorithm (MADS) . . . . . . . . 23 3.2.4 Non-negative Least Squares Problem (NNLS) . . . . . . . . . . . 24 3.3 Simulation Background........................... 25 3.3.1 Environment............................. 25 3.3.2 CIE 1931 XYZ ColorSpace .................... 26 3.3.3 CIE 1976(L∗u∗v∗) Color Space ................. 28 3.3.4 CIE 1964(U∗V∗W∗) Color Space................ 29 3.3.5 Color Rendering Index(CRI) ................... 30 3.3.6 LED Model............................. 31 3.3.7 Generating Daylight Spectrum................... 32 Chap 4 Observations and Analysis 33 4.1 Simulation of Ideal Cases.......................... 33 4.2 Simulation of Practical Cases........................ 39 4.2.1 Observations ............................ 39 4.2.2 GeneralPerformance........................ 44 4.2.3 PowerCoefficient ......................... 45 4.2.4 ColorTemperature ......................... 48 4.3 ColorTemperatureCorrection ....................... 49 4.3.1 Color temperature correction formula ................ 49 4.3.2 Observations with CCT correction................. 51 4.3.3 Comparison with Conventional XYZ mixture method ....... 59 4.4 SystemModification ............................ 63 4.4.1 Controllable Luminous Flux of the System (CLS) ....... 63 4.4.2 PruningProcess........................... 64 4.4.3 Comparison............................. 65 4.4.4 Summary.............................. 70 5 Conclusions 71 5.1 Overview of Performance.......................... 71 5.2 FutureWork................................. 73 References 74 | |
dc.language.iso | en | |
dc.title | 智慧型動態日光模擬照明系統 | zh_TW |
dc.title | Smart Lighting and Dynamic Daylight Simulation | en |
dc.type | Thesis | |
dc.date.schoolyear | 101-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 李允立(Yun-Li Li),陳正言(Cheng-Yen Chen),林晃嚴(Hoang-Yan Lin) | |
dc.subject.keyword | 發光二極體,混色照明,演色性,色溫, | zh_TW |
dc.subject.keyword | LED,Smart lighting,Color rendering index,Correlated color temperature, | en |
dc.relation.page | 77 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2013-08-14 | |
dc.contributor.author-college | 電機資訊學院 | zh_TW |
dc.contributor.author-dept | 光電工程學研究所 | zh_TW |
顯示於系所單位: | 光電工程學研究所 |
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