JP5713958B2 - 能動型騒音制御装置 - Google Patents
能動型騒音制御装置 Download PDFInfo
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- JP5713958B2 JP5713958B2 JP2012116321A JP2012116321A JP5713958B2 JP 5713958 B2 JP5713958 B2 JP 5713958B2 JP 2012116321 A JP2012116321 A JP 2012116321A JP 2012116321 A JP2012116321 A JP 2012116321A JP 5713958 B2 JP5713958 B2 JP 5713958B2
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- 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
- G10K11/17853—Methods, e.g. algorithms; Devices of the filter
- G10K11/17854—Methods, e.g. algorithms; Devices of the filter the filter being an adaptive filter
-
- 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
-
- 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
- G10K11/1783—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 handling or detecting of non-standard events or conditions, e.g. changing operating modes under specific operating conditions
- G10K11/17833—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 handling or detecting of non-standard events or conditions, e.g. changing operating modes under specific operating conditions by using a self-diagnostic function or a malfunction prevention function, e.g. detecting abnormal output levels
-
- 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
- G10K11/17883—General system configurations using both a reference signal and an error signal the reference signal being derived from a machine operating condition, e.g. engine RPM or vehicle speed
-
- 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
- G10K2210/121—Rotating machines, e.g. engines, turbines, motors; Periodic or quasi-periodic signals in general
-
- 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
- G10K2210/1282—Automobiles
- G10K2210/12821—Rolling noise; Wind and body 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
- G10K2210/30—Means
- G10K2210/301—Computational
- G10K2210/3039—Nonlinear, e.g. clipping, numerical truncation, thresholding or variable input and output gain
-
- 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
- G10K2210/50—Miscellaneous
- G10K2210/503—Diagnostics; Stability; Alarms; Failsafe
-
- 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
- G10K2210/50—Miscellaneous
- G10K2210/511—Narrow band, e.g. implementations for single frequency cancellation
Description
図3に示す全体フローチャートが、振幅抑制部50及び第1〜第4能動型騒音制御部11〜14により、一定周期の割り込みで実行される。
図4は、振幅抑制部50により実行されるステップS4のミキサ20の出力レンジDRの第1実施例に係る割当・調整処理の詳細なフローチャートを示している。
A1=G1×{√(Rw1)2+(Iw1)2} …(1)
DRr←DRr−A1 …(2)
A3=G3×{√(Rw3)2+(Iw3)2} …(3)
(DRr−A3)>0 …(4)
DRr←(DRr−A3) …(5)
A2={√(Rw2)2+(Iw2)2} …(6)
DRr−A2>0 …(7)
DRr←(DRr−A2) …(8)
A4={√(Rw4)2+(Iw4)2} …(9)
DRr−A4>0 …(10)
図7及び図8は、振幅抑制部50により実行されるステップS4のミキサ20の出力レンジDRの第2実施例に係る割当・調整処理の詳細なフローチャートを示している。なお、この第2実施例の動作説明に際し、第1実施例の動作と同じあるいは類推される動作については、煩雑さを回避するために省略乃至簡単に説明する。
A1rq=K1×G1×{√(Rw1)2+(Iw1)2} …(11)
A1←A1+ΔDR …(12)
A1←A1−ΔDR …(13)
DRr←DRr−A1 …(14)
A3rq=K3×G3×{√(Rw3)2+(Iw3)2} …(15)
A3←A3+ΔDR …(16)
A3←A3−ΔDR …(17)
DRr←DRr−A3 …(18)
A2rq=K2×{√(Rw2)2+(Iw2)2} …(19)
A2←A2+ΔDR …(20)
A2←A2−ΔDR …(21)
DRr←DRr−A2 …(22)
A4rq=K4×{√(Rw4)2+(Iw4)2} …(23)
A4←A4+ΔDR …(24)
A4←A4−ΔDR …(25)
DRr←DRr−A4 …(26)
上述した第1実施例及び第2実施例を含む実施形態の構成及び作用効果について、理解の便宜のために、図9に示す、優先順位1のロードノイズ1を消音する第1能動型騒音制御部11と、優先順位3(この図9例では、優先順位2)のエンジンこもり音1を消音する第2能動型騒音制御部12との2つの能動型騒音制御部を備える能動型騒音制御装置100を例として説明する。
12…第2能動型騒音制御部 13…第3能動型騒音制御部
14…第4能動型騒音制御部
16…マイクロフォン(誤差信号検出器) 18…車室内空間
20…ミキサ(加算器) 28…スピーカ(相殺音出力部)
31〜34…第1〜第4適応フィルタ 50…振幅抑制部
101、103…適応ノッチフィルタ 111、113…模擬伝達特性部
Claims (6)
- 第1の騒音事象に対する第1相殺信号を生成する第1能動型騒音制御部と、
前記第1の騒音事象とは異なる第2の騒音事象に対する第2相殺信号を生成する第2能動型騒音制御部と、
前記第1相殺信号と前記第2相殺信号とを混合して混合相殺信号を生成するミキサと、
前記混合相殺信号に基づく相殺音を出力する相殺音出力部と、
からなる能動型騒音制御装置であって、
さらに、前記第1相殺信号の振幅に応じて前記第2相殺信号の振幅を抑制する振幅抑制部を備える
ことを特徴とする能動型騒音制御装置。 - 請求項1記載の能動型騒音制御装置において、
前記振幅抑制部は、
前記第1相殺信号の振幅と前記第2相殺信号の振幅の和が、前記ミキサで許容される最大出力振幅を上回る場合に、前記第2相殺信号の振幅を、前記ミキサで許容される前記最大出力振幅から前記第1相殺信号の振幅を引いた差に設定する
ことを特徴とする能動型騒音制御装置。 - 請求項1記載の能動型騒音制御装置において、
前記振幅抑制部は、
前記第1相殺信号の振幅と前記第2相殺信号の振幅の和が、前記ミキサで許容される最大振幅を上回る場合に、前記第2相殺信号の振幅がゼロ値になるように設定する
ことを特徴とする能動型騒音制御装置。 - 請求項1〜3のいずれか1項に記載の能動型騒音制御装置において、
前記第1能動型騒音制御部及び前記第2能動型騒音制御部は、それぞれ適応ノッチフィルタを備え、前記適応ノッチフィルタのそれぞれのフィルタ係数に基づき前記第1相殺信号の振幅及び前記第2相殺信号の振幅を算出する
ことを特徴とする能動型騒音制御装置。 - 請求項1〜4のいずれか1項に記載の能動型騒音制御装置において、
前記第1の騒音事象はロードノイズである
ことを特徴とする能動型騒音制御装置。 - 請求項1に記載の能動型騒音制御装置において、
前記第2の騒音事象に対する第2相殺信号が前記第1の騒音事象に対する第1相殺信号よりも騒音低減優先順位が低く設定されている
ことを特徴とする能動型騒音制御装置。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012116321A JP5713958B2 (ja) | 2012-05-22 | 2012-05-22 | 能動型騒音制御装置 |
US13/894,149 US8848937B2 (en) | 2012-05-22 | 2013-05-14 | Active noise control apparatus |
EP13167833.6A EP2667380B1 (en) | 2012-05-22 | 2013-05-15 | Active noise control apparatus |
CN201310190117.6A CN103426427B (zh) | 2012-05-22 | 2013-05-21 | 主动式噪音控制装置 |
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JP2012116321A JP5713958B2 (ja) | 2012-05-22 | 2012-05-22 | 能動型騒音制御装置 |
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JP2013242459A JP2013242459A (ja) | 2013-12-05 |
JP5713958B2 true JP5713958B2 (ja) | 2015-05-07 |
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US (1) | US8848937B2 (ja) |
EP (1) | EP2667380B1 (ja) |
JP (1) | JP5713958B2 (ja) |
CN (1) | CN103426427B (ja) |
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2012
- 2012-05-22 JP JP2012116321A patent/JP5713958B2/ja active Active
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2013
- 2013-05-14 US US13/894,149 patent/US8848937B2/en active Active
- 2013-05-15 EP EP13167833.6A patent/EP2667380B1/en active Active
- 2013-05-21 CN CN201310190117.6A patent/CN103426427B/zh active Active
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EP2667380B1 (en) | 2016-07-27 |
CN103426427A (zh) | 2013-12-04 |
EP2667380A2 (en) | 2013-11-27 |
CN103426427B (zh) | 2016-02-10 |
JP2013242459A (ja) | 2013-12-05 |
EP2667380A3 (en) | 2014-02-26 |
US20130315409A1 (en) | 2013-11-28 |
US8848937B2 (en) | 2014-09-30 |
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