博碩士論文 etd-0829112-113245 詳細資訊


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姓名 吳亭佑 (Ting-Yu Wu) 電子郵件信箱 m983010004@student.nsysu.edu.tw
畢業系所 電機工程學系研究所(Electrical Engineering)
畢業學位 碩士(Master) 畢業時期 101學年第1學期
論文名稱(中) 固定階數最佳化主動式噪音控制耳機設計
論文名稱(英) Fixed-Order Optimal Controller Design of an ANC Headphone
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    摘要(中) 本論文以回授方式來設計主動式噪音消除(Active Noise Cancellation, ANC)耳機。主動式噪音控制耳機的架構為類比控制器、音頻功率放大器、耳機喇叭、微型麥克風和麥克風放大器所組成的回授迴路。控制器設計引用R. Nagamune和A. Blomqvist於2005年提出的階數限制的靈敏度函數塑型法。和傳統的H2/H∞的最佳化方法相比,這個方法的好處為免去了選取解析的權重函數和以低階控制器的實現時的要做的控制器降階等步驟。本論文設計出以五階的控制器控制的ANC耳機,實測結果顯示它最大的消噪在200Hz附近達到了19.7dB,在控制頻帶107Hz到523Hz的噪音消除能力可以達到10dB以上。而且在控制頻帶外噪音的增長不超過4.26dB。
    摘要(英) This thesis presents a feedback design for an active noise cancellation (ANC) headphone. The designed ANC headphone consists of an analog controller, an audio power amplifier, a headphone speaker, a mini microphone, and a microphone amplifier, which constitute a feedback loop. The controller design follows the method of feedback sensitivity shaping with degree constraint introduced by R. Nagamune and A. Blomqvist in 2005. The advantage of this method is that it eliminates the needs for choosing an analytic weighting function and performing model reduction to yield a lower-order controller, as commonly required in conventional H2/H∞ optimizations. A fifth-order analog controller for the ANC headphone is designed. The experimental result shows a maximum acoustic noise reduction of 19.7 dB near 200 Hz and an overall noise reduction of more than 10 dB in the control frequency band from 107 Hz to 523 Hz. Moreover, the out-of-band noise amplification is limited to a barely noticeable level of 4.26 dB.
    關鍵字(中)
  • 主動式噪音消除耳機
  • 回授控制
  • 靈敏度函數塑型
  • 最佳控制
  • 固定階數控制器
  • 關鍵字(英)
  • fixed-order controller design
  • optimal control
  • sensitivity shaping
  • feedback control
  • active noise cancellation headphone
  • 論文目次 論文審定書 i
    誌謝 ii
    中文摘要 iii
    英文摘要 iii
    第一章 主動式噪音控制耳機簡介 1
    1.1 組成與原理 1
    1.2 控制器設計 3
    1.3 研究目標 5
    第二章 階數限制的靈敏度函數塑型法 6
    2.1 階數限制的靈敏度函數塑型法簡介 6
    2.2 設計流程 11
    第三章 ANC耳機的設計 13
    3.1 功率放大器與麥克風接收電路 13
    3.2 系統鑑別 15
    3.3 控制器設計 18
    3.4 模擬結果 20
    第四章 耳機控制器實作電路與性能量測結果 23
    4.1 控制器的實現 23
    4.2 性能量測 29
    4.3 與其他設計法的比較 31
    第五章 結論 32
    參考文獻 33
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    [10] A. Blomqvist and R. Nagamune, Matlab interface “Sshaper”. The MATLAB code is available at http://www.math.kth.se/~andersb/software.html.
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    [19] J. F. Abbott, “Acoustical design criteria for active noise control systems,” IEEE International Conference on Acoustics, Speech, and Signal Processing, vol. 5, pp. 630-633, 1993.
    [20] S. H. Yu and J. S. Hu, “Controller design for active noise cancellation headphones using experimental raw data,” IEEE/ASME Transactions on Mechatronics, vol. 6, no. 4, pp. 483-490, 2001.
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    口試委員
  • 高崇堯 - 召集委員
  • 彭昭暐 - 委員
  • 邱日清 - 委員
  • 余祥華 - 指導教授
  • 口試日期 2012-08-09 繳交日期 2012-08-29

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