An Open-Loop Pole-Zero Placement Method for Active Noise Control Headphones
Active noise control headphones for hearing protection are effective in the low frequency range, and both analog and digital controllers are used widely. Considering the bandwidth of noise reduction, the analog controller is more beneficial due to its shorter delay compared with the digital one. Ana...
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| Veröffentlicht in: | IEEE transactions on control systems technology 2017-07, Vol.25 (4), p.1278-1283 |
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| container_end_page | 1283 |
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| container_title | IEEE transactions on control systems technology |
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| creator | Liang, Keng-Wei Hu, Jwu-Sheng |
| description | Active noise control headphones for hearing protection are effective in the low frequency range, and both analog and digital controllers are used widely. Considering the bandwidth of noise reduction, the analog controller is more beneficial due to its shorter delay compared with the digital one. Analog controllers with fixed circuit structures are preferable for practical implementation. However, fixed-order controllers with low complexity, such as a biquad filter, are difficult to design for a high reduction level. On the other hand, a high order one, getting from the H inf -norm optimization, is costly due to a larger number of circuit components. In this paper, an H 2 -norm optimization method that places the controller's pole-zero locations to meet desired robustness and performance, is proposed. To determine an initial guess with an appropriate order of the controller, a loopshaping method by loop transfer recovery (LTR) is introduced. The experimental results show the effectiveness of the method. |
| doi_str_mv | 10.1109/TCST.2016.2594589 |
| format | Article |
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Considering the bandwidth of noise reduction, the analog controller is more beneficial due to its shorter delay compared with the digital one. Analog controllers with fixed circuit structures are preferable for practical implementation. However, fixed-order controllers with low complexity, such as a biquad filter, are difficult to design for a high reduction level. On the other hand, a high order one, getting from the H inf -norm optimization, is costly due to a larger number of circuit components. In this paper, an H 2 -norm optimization method that places the controller's pole-zero locations to meet desired robustness and performance, is proposed. To determine an initial guess with an appropriate order of the controller, a loopshaping method by loop transfer recovery (LTR) is introduced. 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Considering the bandwidth of noise reduction, the analog controller is more beneficial due to its shorter delay compared with the digital one. Analog controllers with fixed circuit structures are preferable for practical implementation. However, fixed-order controllers with low complexity, such as a biquad filter, are difficult to design for a high reduction level. On the other hand, a high order one, getting from the H inf -norm optimization, is costly due to a larger number of circuit components. In this paper, an H 2 -norm optimization method that places the controller's pole-zero locations to meet desired robustness and performance, is proposed. To determine an initial guess with an appropriate order of the controller, a loopshaping method by loop transfer recovery (LTR) is introduced. The experimental results show the effectiveness of the method.</abstract><pub>IEEE</pub><doi>10.1109/TCST.2016.2594589</doi><tpages>6</tpages><orcidid>https://orcid.org/0000-0002-2949-5591</orcidid></addata></record> |
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| source | IEEE Xplore / Electronic Library Online (IEL) |
| subjects | <italic xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">H inf-norm optimization <italic xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">H ₂-norm optimization Active noise control Bandwidth Circuit stability feedback control Headphones loop transfer recovery Noise reduction Optimization Poles and zeros Sensitivity |
| title | An Open-Loop Pole-Zero Placement Method for Active Noise Control Headphones |
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