JP7039512B2 - 動翼静翼干渉騒音低減システムおよび飛行体 - Google Patents
動翼静翼干渉騒音低減システムおよび飛行体 Download PDFInfo
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- JP7039512B2 JP7039512B2 JP2019044826A JP2019044826A JP7039512B2 JP 7039512 B2 JP7039512 B2 JP 7039512B2 JP 2019044826 A JP2019044826 A JP 2019044826A JP 2019044826 A JP2019044826 A JP 2019044826A JP 7039512 B2 JP7039512 B2 JP 7039512B2
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/04—Antivibration arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/26—Antivibration means not restricted to blade form or construction or to blade-to-blade connections or to the use of particular materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/04—Air intakes for gas-turbine plants or jet-propulsion plants
- F02C7/045—Air intakes for gas-turbine plants or jet-propulsion plants having provisions for noise suppression
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C9/00—Controlling gas-turbine plants; Controlling fuel supply in air- breathing jet-propulsion plants
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
- F04D29/665—Sound attenuation by means of resonance chambers or interference
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- 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
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- 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
- G10K11/1781—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 characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
- G10K11/17813—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 characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the acoustic paths, e.g. estimating, calibrating or testing of transfer functions or cross-terms
- G10K11/17815—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 characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the acoustic paths, e.g. estimating, calibrating or testing of transfer functions or cross-terms between the reference signals and the error signals, i.e. primary path
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- 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
- G10K11/1785—Methods, e.g. algorithms; Devices
- G10K11/17857—Geometric disposition, e.g. placement of microphones
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- 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
- G10K11/1787—General system configurations
- G10K11/17879—General system configurations using both a reference signal and an error signal
- G10K11/17881—General system configurations using both a reference signal and an error signal the reference signal being an acoustic signal, e.g. recorded with a microphone
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D33/00—Arrangements in aircraft of power plant parts or auxiliaries not otherwise provided for
- B64D33/02—Arrangements in aircraft of power plant parts or auxiliaries not otherwise provided for of combustion air intakes
- B64D2033/0206—Arrangements in aircraft of power plant parts or auxiliaries not otherwise provided for of combustion air intakes comprising noise reduction means, e.g. acoustic liners
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D33/00—Arrangements in aircraft of power plant parts or auxiliaries not otherwise provided for
- B64D33/02—Arrangements in aircraft of power plant parts or auxiliaries not otherwise provided for of combustion air intakes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/96—Preventing, counteracting or reducing vibration or noise
- F05D2260/962—Preventing, counteracting or reducing vibration or noise by means of "anti-noise"
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- 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
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/10—Applications
- G10K2210/128—Vehicles
- G10K2210/1281—Aircraft, e.g. spacecraft, airplane or helicopter
Description
減衰レベルattの評価式を
[第1実施形態]
ここで、aは動翼13の長さ(動翼半径)、b=r×aはスピーカ16が設置される円の半径、kは上限波数,j0は球ベッセル関数である。発明者らは、上記式をすべてのkaの範囲に一般化した次式を得た。
設計者は、図4のグラフに基づき、目標とする音響パワー低減量と、Xとの関係を知ることができる。すなわち、動翼音源0次周方向発生ロブモード(m=0)の音響パワー低減量の目標値として、6dBの減衰を図りたいときには、図4の曲線に従いX<1.1とすべきことを読み取れる。同様に、動翼音源0次周方向発生ロブモード(m=0)の音響パワー低減量の目標値として、10dBの減衰を図りたいときには、図4の曲線に従いX<0.8とすべきことを読み取れる。動翼音源0次周方向発生ロブモード(m=0)の音響パワー低減量の目標値として、20dBの減衰を図りたいときには、図4の曲線に従いX<0.5とすべきことを読み取れる。このように、目標となる音響パワーの低減量を定めた結果、rの値を自動的に決定することができ、従来のようにスピーカ16が設置される円の半径を経験に基づき試行錯誤で決定していく作業を省略できる。
[第1実施例]
[第2実施例]
[第2実施形態]
[第3実施例]
[第4実施例]
1以上の評価マイク17は、中心軸12を延長した延長線25上に中心が位置する1つの円上に離散的に配置され、延長線25とダクト15の端面24とが交差する点から見た1以上の評価マイク17の仰角をθaとしたとき、
ここで、
Claims (7)
- 中心軸回りに回転する複数の動翼と、
前記複数の動翼に対向した複数の静翼と、
前記中心軸上又は前記中心軸を延長した延長線上に中心が位置する1つの円上に離散的に配置され、制御音を発生する複数のスピーカと、
1以上の評価マイクと、
前記評価マイクで取得した信号に基づき、前記複数のスピーカから同相かつ同振幅の前記制御音を発生させる制御部と、
を備え、
減衰レベルattの評価式を
目標の騒音減衰レベルから前記att、前記X、および前記kに基づき、前記rが選択された動翼静翼干渉騒音低減システム。 - 前記Lcは、3個以上である請求項2に記載の動翼静翼干渉騒音低減システム。
- 前記1以上の評価マイクは、前記中心軸を延長した延長線上で前記動翼から所定距離離れた位置に配置される請求項1~3のいずれか1項に記載の動翼静翼干渉騒音低減システム。
- 前記複数の動翼と前記複数の静翼とを取り囲むダクトを備え、
Lmは前記1以上の評価マイクの数、L c は前記スピーカの数、Nは適当な整数であるとしたとき、
前記評価マイクは、前記中心軸を延長した延長線上に中心が位置する1つの円上に離散的に配置され、前記延長線と前記ダクトの端面とが交差する点から見た前記1以上の評価マイクの仰角をθaとしたとき、
ここで、
前記制御部は、前記評価マイクのそれぞれの信号の平均を用いる請求項1に記載の動翼静翼干渉騒音低減システム。 - 請求項1に記載の動翼静翼干渉騒音低減システムを備える飛行体。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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JP2019044826A JP7039512B2 (ja) | 2019-03-12 | 2019-03-12 | 動翼静翼干渉騒音低減システムおよび飛行体 |
GB1912223.3A GB2582189B (en) | 2019-03-12 | 2019-08-27 | System for reducing interference noise of rotor and stator blades, and flight vehicle |
US16/555,596 US11415152B2 (en) | 2019-03-12 | 2019-08-29 | System for reducing interference noise of rotor and stator blades, and flight vehicle |
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JP2019044826A JP7039512B2 (ja) | 2019-03-12 | 2019-03-12 | 動翼静翼干渉騒音低減システムおよび飛行体 |
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JP2020148851A JP2020148851A (ja) | 2020-09-17 |
JP7039512B2 true JP7039512B2 (ja) | 2022-03-22 |
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JP (1) | JP7039512B2 (ja) |
GB (1) | GB2582189B (ja) |
Families Citing this family (3)
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US11151974B1 (en) * | 2020-05-27 | 2021-10-19 | Pony Ai Inc. | Audio control to mask vehicle component noise |
CN113112982B (zh) * | 2021-04-13 | 2022-08-16 | 上海联影医疗科技股份有限公司 | 一种医疗设备、医疗设备的降噪方法及存储介质 |
CN113421537B (zh) * | 2021-06-09 | 2022-05-24 | 南京航空航天大学 | 一种旋翼飞行器的全局主动降噪方法 |
Citations (1)
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JP2009103079A (ja) | 2007-10-24 | 2009-05-14 | Nippon Densan Corp | 送風装置 |
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GB1456018A (en) * | 1972-11-24 | 1976-11-17 | Nat Res Dev | Active control of sound waves |
JPH01159406A (ja) | 1987-12-15 | 1989-06-22 | Mitsui Eng & Shipbuild Co Ltd | プロペラ音の能動消音方法及び装置 |
JPH01128000U (ja) | 1988-02-26 | 1989-08-31 | ||
US5355417A (en) * | 1992-10-21 | 1994-10-11 | The Center For Innovative Technology | Active control of aircraft engine inlet noise using compact sound sources and distributed error sensors |
US5515444A (en) | 1992-10-21 | 1996-05-07 | Virginia Polytechnic Institute And State University | Active control of aircraft engine inlet noise using compact sound sources and distributed error sensors |
US5526432A (en) | 1993-05-21 | 1996-06-11 | Noise Cancellation Technologies, Inc. | Ducted axial fan |
US5420383A (en) * | 1993-10-22 | 1995-05-30 | United Technologies Corporation | Anti-sound arrangement for multi-stage blade cascade |
US5382134A (en) | 1993-11-01 | 1995-01-17 | General Electric Company | Active noise control using noise source having adaptive resonant frequency tuning through stiffness variation |
US5478199A (en) * | 1994-11-28 | 1995-12-26 | General Electric Company | Active low noise fan assembly |
US6201872B1 (en) | 1995-03-12 | 2001-03-13 | Hersh Acoustical Engineering, Inc. | Active control source cancellation and active control Helmholtz resonator absorption of axial fan rotor-stator interaction noise |
JP2003233133A (ja) | 2002-02-12 | 2003-08-22 | Canon Inc | 消音装置およびこれを備えた光学装置 |
JP6645991B2 (ja) | 2017-01-13 | 2020-02-14 | 株式会社東芝 | 動翼騒音低減装置、飛行体及びプログラム |
JP6689241B2 (ja) | 2017-09-15 | 2020-04-28 | 株式会社東芝 | 騒音低減装置、飛行体、発電装置、騒音低減方法及び騒音低減プログラム |
JP6826067B2 (ja) | 2018-03-20 | 2021-02-03 | 株式会社東芝 | 動翼静翼干渉騒音低減システムおよび飛行体 |
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- 2019-03-12 JP JP2019044826A patent/JP7039512B2/ja active Active
- 2019-08-27 GB GB1912223.3A patent/GB2582189B/en active Active
- 2019-08-29 US US16/555,596 patent/US11415152B2/en active Active
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JP2009103079A (ja) | 2007-10-24 | 2009-05-14 | Nippon Densan Corp | 送風装置 |
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US11415152B2 (en) | 2022-08-16 |
GB2582189B (en) | 2021-07-28 |
GB2582189A (en) | 2020-09-16 |
GB201912223D0 (en) | 2019-10-09 |
JP2020148851A (ja) | 2020-09-17 |
US20200291964A1 (en) | 2020-09-17 |
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