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研究生:陳炫綜
研究生(外文):Hsuan-Tsung Chen
論文名稱:多變數強韌控制理論在質子交換膜燃料電池上的應用
論文名稱(外文):Multivariable Robust Control of a Proton Exchange Membrane Fuel Cell System
指導教授:顏家鈺顏家鈺引用關係
學位類別:博士
校院名稱:國立臺灣大學
系所名稱:機械工程學研究所
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2009
畢業學年度:97
語文別:中文
論文頁數:101
中文關鍵詞:質子交換膜燃料電池強韌控制系統識別定階控制設計氫氣使用效率單晶片控制器實現
外文關鍵詞:Proton Exchange Membrane Fuel CellRobust controlSystem identificationFixed-order optimizationHydrogen efficiencySystem implementation
相關次數:
  • 被引用被引用:7
  • 點閱點閱:201
  • 評分評分:
  • 下載下載:0
  • 收藏至我的研究室書目清單書目收藏:0
本文係利用強韌控制理論-中央控制與定階強韌控制理論於質子交換膜燃料電池,進行控制器設計,以達到穩定輸出電壓以及降低氫氣消耗的目標,最後將強韌控制器以單晶片系統實現,以控制質子交換膜燃料電池。由系統的觀點來看,燃料電池本身可視為一雙輸入雙輸出的系統,其輸入為空氣與氫氣的流量,輸出為電壓與電流,若是固定輸出負載,則此系統可進一步簡化為雙輸入單輸出的系統,因此我們可藉由控制空氣與氫氣的流量,來控制電壓或電流的輸出量,因為一般的電器用品或是DC/DC轉換器大都需要穩定的電壓供應,因此在本文中以穩定輸出電壓為目標。由於燃料電池本身為非線性且時變的系統,因此本文應用系統識別方法,在各操作點將質子交換膜燃料電池識別為多變數線性系統,而將系統之非模化動態,視為系統不確定性與外部干擾,並利用強韌控制來達到穩定系統與增進效能的目標。我們更進一步針對一般的強韌控制具有階數較高(系統階數加上權重函數的階數)的缺點,引入定階強韌控制理論,希望以較低階的控制器達到預計的設計要求。最後,則是將所設計的多變數強韌控制器實現於單晶片系統上,成功完成系統的縮小化與可攜式的目標。最後實驗結果顯示,所設計之多變數控制器,確實能達到系統穩定、增進性能與系統縮小化的目標。
This paper applies multivariable robust control strategies-central control and fixed-order control to a proton exchange membrane fuel cell (PEMFC) system and implements the designed controllers on a microchip for system miniaturization. From the system point of view, a PEMFC can be modeled as a two-input-two-output system, where the inputs are air and hydrogen flow rates and the outputs are cell voltage and current. By fixing the output resistance, the system can be further reduced to a two-input-single-output system. That is, we can either control the cell voltage or current output by regulating the air and the hydrogen flow rates. Since most electrical equipment requires constant voltage supply, in this thesis we aim to control the cell voltage output. Due to the nonlinear characteristics of this system, multivariable robust controllers were designed to provide robust performance and to reduce the hydrogen consumption of this system. However, for standard robust control design, the order of resulting controllers is constrained by the plants and weighting functions. For hardware implementation, controllers with lower orders are preferable in terms of computing efforts and cost. Therefore, we apply fixed-order robust control algorithms to design controllers with specified orders for a PEMFC, and evaluate efficiency of the system employing these controllers. Furthermore, the designed controllers are implemented on a microchip for system miniaturization. From the experimental results, multivariable robust control is deemed effective in supplying steady power and reducing fuel consumption.
口試委員會審定書 i
誌謝 ii
中文摘要 iii
Abstract iv
目錄 v
圖目錄 vii
表目錄 ix
第一章 序論 1
1.1 研究動機 1
1.2 文獻回顧 3
1.3 各章摘要 6
第二章 燃料電池簡介 7
2.1 燃料電池的歷史 7
2.2 燃料電池工作原理 7
2.3 燃料電池的種類與特性 8
2.4 燃料電池的優缺點與特色 11
第三章 質子交換膜燃料電池數學模型建立 14
3.1 質子交換膜燃料電池的系統架構 14
3.2 質子交換膜燃料電池的自由能與理想電位 16
3.2.1 理想電位與溫度的關係 17
3.2.2 理想電位與氣體壓力的關係 19
3.3 極化現象 20
3.4 燃料電池的動態模型 22
3.4.1 動態模型建立的基本假設 23
3.4.2 陰極氣體擴散模型 23
3.4.3 陰極電化學動力模型 24
3.4.4 電池內阻模型 26
第四章 系統識別 29
4.1 系統識別的原理與方法 29
4.2 部分空間系統識別法 31
4.3 系統識別實驗規劃 34
4.4 系統識別實驗結果 38
第五章 強韌控制理論介紹和設計 40
5.1 範數定義 40
5.1.1 訊號及系統的範數表示 41
5.2 強韌控制結構的一般化 42
5.3 系統不確定性 44
5.4 強韌性概念與分析 48
5.5 標稱系統的選擇 49
5.6 次最佳化 強韌性控制器設計 55
5.7 定階控制器設計 58
5.8 迴路成形設計 62
5.9 控制器的合成 65
第六章 強韌控制器的實驗結果與討論 67
6.1 利用個人電腦實現控制器 67
6.1.1 定電壓質子交換膜燃料電池實驗 68
6.1.2 定電流質子交換膜燃料電池實驗 73
6.2 控制系統性能驗證 75
6.3 利用單晶片實現控制器 83
第七章 結論與未來展望 87
7.1 結論 87
7.2 未來展望 89
參考文獻 91
附錄 95
口試委員問題與回答 98
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