JPH11502032A - 小型音源および分布型誤差センサを用いた航空機エンジン吸入口騒音の能動的抑制 - Google Patents
小型音源および分布型誤差センサを用いた航空機エンジン吸入口騒音の能動的抑制Info
- Publication number
- JPH11502032A JPH11502032A JP8512621A JP51262196A JPH11502032A JP H11502032 A JPH11502032 A JP H11502032A JP 8512621 A JP8512621 A JP 8512621A JP 51262196 A JP51262196 A JP 51262196A JP H11502032 A JPH11502032 A JP H11502032A
- Authority
- JP
- Japan
- Prior art keywords
- sound
- noise
- panel
- engine
- curvature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
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Classifications
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- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
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- G10K11/17879—General system configurations using both a reference signal and an error signal
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- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
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- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
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- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
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- G10K11/1785—Methods, e.g. algorithms; Devices
- G10K11/17857—Geometric disposition, e.g. placement of microphones
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2260/00—Function
- F05B2260/96—Preventing, counteracting or reducing vibration or noise
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- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/10—Applications
- G10K2210/107—Combustion, e.g. burner noise control of jet engines
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- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
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- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
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- G10K2210/129—Vibration, e.g. instead of, or in addition to, acoustic noise
- G10K2210/1291—Anti-Vibration-Control, e.g. reducing vibrations in panels or beams
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- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
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- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/50—Miscellaneous
- G10K2210/511—Narrow band, e.g. implementations for single frequency cancellation
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Exhaust Silencers (AREA)
Abstract
Description
Claims (1)
- 【特許請求の範囲】 1.一次音場を発生する回転を伴うファン及び圧縮機を有する航空機用ガスター ビンエンジンのエンジン吸入口から出る航空機エンジン騒音を小さくする能動的 騒音抑制システムであって、 前記タービンエンジン内で前記ファンの近傍に取り付けられ基準音響信号を発 生するとともに放射音と相関のあるブレード通過周波数および高調波を検出する ブレード通過センサと、 前記一次音場に応答できるように配置され誤差音響信号を発生する分布型誤差 センサと、 前記ファンの前方の前記吸入口の内側表面に円周沿いに整列状態で取り付けら れた圧電駆動パネルのアレーから成る音響駆動手段であって、 (i) 前記内側表面に沿いその表面と合致した形状を備え、各々が内側曲率半径 、外側曲率半径およびその外側曲率半径の画する外側表面を有する複数の圧電駆 動曲面パネルと、 (ii)前記曲面パネルの各々の前記外側表面に取り付けられた一つ以上の表面歪 圧電アクチュエータ手段と を含む音響駆動手段と、 前記基準音響信号および前記誤差音響信号に応答して前記音響駆動手段の駆動 を、前記一次音場と近似的に等しい振幅で逆相の二次音場を発生しそれによって 前記エンジン騒音を実効的に小さくするように前記表面歪圧電アクチュエータ手 段を駆動することによって行う抑制手段と、 前記圧電駆動パネルの共振周波数を同調させる機械的同調手段と を含む能動的騒音抑制システム。 2.前記機械的同調手段が前記圧電駆動パネルの剛性を選択的に変化させる手段 を含む請求項1記載の能動的騒音抑制システム。 3.前記圧電駆動パネルの剛性を選択的に変化させる手段が前記圧電駆動パネル にガス圧力をかける手段を含む請求項2記載の能動的騒音抑制システム。 4.騒音消去のための制御音場を発生する小型音響駆動装置であって、 内側曲率半径および外側曲率半径を有しその外側曲率半径の画する外側表面を 有する曲面パネルと、 前記消去の対象である騒音の中の音の周波数の近傍に基本波周波数をもつよう に前記曲面パネルを同調させる機械的手段と、 前記曲面パネルの前記外側表面のみに取り付けられ、前記曲面パネルに機械的 に結合されてそれに機械的動きを伝える表面歪アクチュエータ手段と、 前記表面歪アクチュエータ手段に結合されその表面歪アクチュエータを駆動し 前記基本波周波数の機械的動きを伝えて前記騒音の中の前記音の消去のための前 記制御音場を発生する電気信号発生手段と を含む小型音響駆動装置。 5.前記機械的同調手段が前記曲面パネルの剛性を選択的に変化させる手段を含 む請求項4記載の小型音響駆動装置。 6.前記曲面パネルの剛性を選択的に変化させる手段が前記曲面パネルにガス圧 力をかける手段を含む請求項5記載の能動的騒音抑制システム。 7.騒音消去のための制御音場を発生する小型音響駆動装置であって、 消去すべき前記騒音の中の音の周波数の近傍に基本波周波数をもつように同調 させてあり、内側曲率半径および外側曲率半径を有しその外側曲率半径の画する 外側表面を有する曲面パネルと、 前記曲面パネルの前記外側表面のみに取り付けられ、前記曲面パネルに機械的 に結合されてそれに機械的動きを伝える表面歪アクチュエータ手段と、 前記表面歪アクチュエータ手段に結合されその表面歪アクチュエータ手段を駆 動し前記基本波周波数の機械的動きを伝えて前記騒音の中の前記音の消去のため の前記制御音場を発生させる電気信号発生手段と を含む小型音響駆動装置。 8.制御音場を発生する小型音響駆動装置であって、 内側曲率半径および外側曲率半径を有しその外側曲率半径の画する外側表面を 有する曲面パネルと、 前記曲面パネルの前記外側表面のみに取り付けられ、前記曲面パネルに機械的 に結合されてそれに機械的動きを伝える表面歪アクチュエータ手段と、 前記表面歪アクチュエータ手段に結合されそのアクチュエータ手段を駆動し前 記曲面パネルに機械的動きを伝えて前記制御音場を発生させるとともに、前記ア クチュエータ手段の駆動を前記曲面パネルの共振周波数に近似的に等しい周波数 で行う電気信号発生手段であって、前記曲面パネルに機械的応力をかけその曲面 パネルの共振周波数を変化させるように前記アクチュエータ手段をバイアスさせ る手段をさらに含む電気信号発生手段と を含む小型音響駆動装置。 9.一次音場を発生する回転を伴うファンおよび圧縮機を有する航空機用ガスタ ービンエンジンのエンジン吸入口から出る航空機エンジン騒音を小さくする能動 的騒音抑制システム用であって、前記ファンの前段の吸入口の内側表面に円周沿 いに取り付けられ制御音場を発生する小型音響駆動装置のアレーであって、前記 小型音響駆動装置の各々が、 消去すべき前記航空機騒音の中の音の周波数の近傍に基本波周波数をもつよう に同調させてあり、内側曲率半径および外側曲率半径を有し、外側曲率半径を有 する曲面パネルと、 前記曲面パネルの前記外側表面のみに取り付けられ、前記曲面パネルに機械的 に結合されてそれに機械的動きを伝える表面歪アクチュエータ手段と、 前記表面歪アクチュエータ手段に結合されその表面歪アクチュエータ手段を駆 動し前記基本波周波数の機械的動きを伝えて前記航空機エンジン騒音の中の前記 音の消去のための前記制御音場を発生させる電気信号発生手段と を含む小型音響駆動装置のアレー。 10.一次音場を発生する回転を伴うファンおよび圧縮機を有する航空機用ガス タービンエンジンのエンジン吸入口から出る航空機エンジン騒音を小さくする能 動的騒音抑制システム用であって、前記ファンの前段の吸入口の内側表面に円周 沿いに取り付けられ制御音場を発生する小型音響駆動装置のアレーであって、前 記小型音響駆動装置の各々が、 消去すべき前記航空機騒音の中の音の周波数の近傍に基本波周波数をもつよう に同調させてあり、内側曲率半径および外側曲率半径を有し、外側曲率半径を有 する曲面パネルと、 前記曲面パネルの前記外側表面のみに取り付けられ、前記曲面パネルに機械的 に結合されてそれに機械的動きを伝える表面歪アクチュエータ手段と、 前記表面歪アクチュエータ手段に結合されそのアクチュエータ手段を駆動し前 記曲面パネルに機械的動きを伝えて前記制御音場を発生させるとともに、前記ア クチュエータ手段の駆動を前記曲面パネルの共振周波数に近似的に等しい周波数 で行う電気信号発生手段であって、前記曲面パネルに機械的応力をかけその曲面 パネルの共振周波数を変化させるように前記アクチュエータ手段をバイアスさせ る手段をさらに含む電気信号発生手段と を含む小型音響駆動装置のアレー。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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US08/320,153 | 1994-10-07 | ||
US08/320,153 US5515444A (en) | 1992-10-21 | 1994-10-07 | Active control of aircraft engine inlet noise using compact sound sources and distributed error sensors |
PCT/US1995/012541 WO1996011465A1 (en) | 1994-10-07 | 1995-10-06 | Active control of aircraft engine inlet noise using compact sound sources and distributed error sensors |
Publications (1)
Publication Number | Publication Date |
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JPH11502032A true JPH11502032A (ja) | 1999-02-16 |
Family
ID=23245113
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP8512621A Ceased JPH11502032A (ja) | 1994-10-07 | 1995-10-06 | 小型音源および分布型誤差センサを用いた航空機エンジン吸入口騒音の能動的抑制 |
Country Status (5)
Country | Link |
---|---|
US (1) | US5515444A (ja) |
EP (1) | EP0784845A4 (ja) |
JP (1) | JPH11502032A (ja) |
CA (1) | CA2200296A1 (ja) |
WO (1) | WO1996011465A1 (ja) |
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JP2013177886A (ja) * | 2012-02-06 | 2013-09-09 | General Electric Co <Ge> | 逆回転オープンロータガスタービンエンジンのためのモデルベース制御の方法および装置 |
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US10909962B2 (en) | 2017-09-15 | 2021-02-02 | Kabushiki Kaisha Toshiba | Noise reduction device, flight vehicle, power generation device, and noise reduction method |
US10510332B2 (en) | 2018-03-15 | 2019-12-17 | Kabushiki Kaisha Toshiba | Noise reduction apparatus and jet fan |
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US10559292B2 (en) | 2018-03-20 | 2020-02-11 | Kabushiki Kaisha Toshiba | Rotor blade noise reduction system, flying object and noise reduction system |
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Also Published As
Publication number | Publication date |
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EP0784845A4 (en) | 1999-11-03 |
US5515444A (en) | 1996-05-07 |
WO1996011465A1 (en) | 1996-04-18 |
CA2200296A1 (en) | 1996-04-18 |
EP0784845A1 (en) | 1997-07-23 |
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