JP4077383B2 - 能動型振動騒音制御装置 - Google Patents
能動型振動騒音制御装置 Download PDFInfo
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- JP4077383B2 JP4077383B2 JP2003318362A JP2003318362A JP4077383B2 JP 4077383 B2 JP4077383 B2 JP 4077383B2 JP 2003318362 A JP2003318362 A JP 2003318362A JP 2003318362 A JP2003318362 A JP 2003318362A JP 4077383 B2 JP4077383 B2 JP 4077383B2
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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
- G10K11/1787—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
- 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
- G10K11/17817—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 output signals and the error signals, i.e. secondary 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
- G10K11/1781—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
- G10K11/17821—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 input signals only
- G10K11/17823—Reference signals, e.g. ambient acoustic environment
-
- 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
- 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
- G10K11/17855—Methods, e.g. algorithms; Devices for improving speed or power requirements
-
- 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
- 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
-
- 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
- G10K2210/3046—Multiple acoustic inputs, multiple acoustic outputs
Description
Y′0+Y′1=c00・Y0+c10・Y1 (1)
ここで、Y1=F・Y0から、(1)式は以下のように変形することができる。
c00・Y0+c10・Y1=c00・Y0+c10・F・Y0
=Y0・(c00+F・c10) (2)
故に、cは次式のように示すことができる。
c=(c00+F・c10) (3)
F=−c01/c11 (4)
W(n+1)=W(n)−μ・e(n)・C・X(n) (5)
C(f)=CR(f)+j・CI(f) (6)
尚、上式で、CR(r):周波数fの音の伝達特性の余弦波成分、CI(f):周波数fの音の伝達特性の正弦波成分を示す。
c・X=C(f)・[RX(f)+j・RY(f)]
=[CR(f)+j・CI(f)]・[RX(f)+j・RY(f)]
=CR(f)RX(f)+j・CI(f)・RX(f)
+j・CR(f)・RY(f)−CI(f)・RY(f)
=[CR(f)RX(f)−CI(f)・RY(f)]
+j・[CR(f)・RY(f)+CI(f)・RX(f)] (7)
ra=CR(f)・RX(f)−CI(f)・RY(f) (8)
rb=CR(f)・RY(f)−CI(f)・RX(f) (9)
F(f)=FR(f)+j・FI(f) (10)
e0=c00・Y0+c10・Y1+d0 (11)
e1=c01・Y0+c11・Y1+d1 (12)
d1=q・d0 (13)
e1=q・e0 (14)
従って、(11)(12)(13)(14)式から、次式を得ることができる。
Y0(c01−q・c00)=Y1(q・c10−c11) (15)
F=Y″1/Y0
=Y1/Y0
=(c01−q・c00)/(q・c10−c11) (16)
c0=c00+c01+c02
c1=c10+c11+c12
c2=c20+c21+c22 (17)
c0=c00+c01+F0(c20+c21)
c1=c10+c11+F1(c20+c21) (18)
10a 車室
12 内燃機関(エンジン)
14 能動型振動騒音制御装置
16 コントローラ
16a 基準信号生成手段
16b 適応フィルタ(適応型フィルタ)
16c 補正フィルタ
16d 適応アルゴリズム(フィルタ係数更新手段)
16e 補償フィルタ
16f 模擬評価点
20 スピーカ(相殺信号出力手段)
20f 前席側スピーカ(第1相殺信号出力手段)
20r 後席側スピーカ(第2相殺信号出力手段)
22 マイクロフォン(誤差信号検出手段)
Claims (2)
- 振動源あるいは騒音源から発生する振動あるいは騒音の周波数から選択される調波の基準信号を生成する基準信号生成手段と、前記基準信号に基づいて制御信号を出力する適応型フィルタと、前記制御信号に基づいて前記振動あるいは騒音を相殺するための相殺信号を出力する複数個の相殺信号出力手段と、評価点における前記相殺信号と前記振動あるいは騒音との干渉による残留振動騒音を誤差信号として検出する誤差信号検出手段と、前記基準信号の周波数に対応した前記振動あるいは騒音の、前記相殺信号出力手段から前記誤差信号検出手段までの伝達特性を示す補正値で前記基準信号を補正して参照信号を生成する補正フィルタと、前記誤差信号と前記参照信号に基づいて前記誤差信号が最小となるように前記適応型フィルタのフィルタ係数を逐次更新するフィルタ係数更新手段とからなる能動型振動騒音制御装置において、前記制御信号を所定値で補正する補償フィルタを備えると共に、前記相殺信号出力手段を、前記制御信号を前記相殺信号として出力する第1相殺信号出力手段と、前記補償フィルタで補正された制御信号を前記相殺信号として出力する第2相殺信号出力手段とから構成し、さらに前記補正フィルタの補正値を、前記第1相殺信号出力手段から前記誤差信号検出手段までの伝達特性と、前記第2相殺信号出力手段から前記誤差検出手段までの伝達特性と前記所定値との積とを加算して得られる和とすると共に、前記所定値は、前記相殺信号が出力されないときの前記評価点から、前記評価点から離間した位置に設定される模擬評価点までの伝達特性をq、前記第1相殺信号出力手段から前記誤差信号検出手段までの伝達特性をc00、前記第1相殺信号出力手段から前記模擬評価点までの伝達特性をc01、前記第2相殺信号出力手段から前記誤差信号検出手段までの伝達特性をc10、前記第2相殺信号出力手段から前記模擬評価点までの伝達特性をc11とするとき、(c01−q・c00)/(q・c10−c11)で求められることを特徴とする能動型振動騒音制御装置。
- 振動源あるいは騒音源から発生する振動あるいは騒音の周波数から選択される調波の基準信号を生成する基準信号生成手段と、前記基準信号に基づいて制御信号を出力する適応型フィルタと、前記制御信号に基づいて前記振動あるいは騒音を相殺するための相殺信号を出力する複数個の相殺信号出力手段と、評価点における前記相殺信号と前記振動あるいは騒音との干渉による残留振動騒音を誤差信号として検出する誤差信号検出手段と、前記基準信号の周波数に対応した前記振動あるいは騒音の、前記相殺信号出力手段から前記誤差信号検出手段までの伝達特性を示す補正値で前記基準信号を補正して参照信号を生成する補正フィルタと、前記誤差信号と前記参照信号に基づいて前記誤差信号が最小となるように前記適応型フィルタのフィルタ係数を逐次更新するフィルタ係数更新手段とからなる能動型振動騒音制御装置において、前記制御信号を所定値で補正する補償フィルタを備えると共に、前記相殺信号出力手段を、前記制御信号を前記相殺信号として出力する第1相殺信号出力手段と、前記補償フィルタで補正された制御信号を前記相殺信号として出力する第2相殺信号出力手段とから構成し、さらに前記補正フィルタの補正値を、前記第1相殺信号出力手段から前記誤差信号検出手段までの伝達特性と、前記第2相殺信号出力手段から前記誤差検出手段までの伝達特性と前記所定値との積とを加算して得られる和とすると共に、前記評価点から離間した位置に設定される模擬評価点での模擬誤差信号を検出し、前記誤差信号検出手段によって検出される誤差信号と前記模擬誤差信号との和が最小となるような前記第1相殺信号出力手段と前記第2相殺信号出力手段の相殺信号比を求め、前記求めた相殺信号比を前記所定値とすることを特徴とする能動型振動騒音制御装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003318362A JP4077383B2 (ja) | 2003-09-10 | 2003-09-10 | 能動型振動騒音制御装置 |
US10/936,600 US7536018B2 (en) | 2003-09-10 | 2004-09-09 | Active noise cancellation system |
EP04255490A EP1515304B1 (en) | 2003-09-10 | 2004-09-10 | Active noise cancellation system having an adaptive filter and a correction filter |
Applications Claiming Priority (1)
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JP2003318362A JP4077383B2 (ja) | 2003-09-10 | 2003-09-10 | 能動型振動騒音制御装置 |
Publications (2)
Publication Number | Publication Date |
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JP2005084500A JP2005084500A (ja) | 2005-03-31 |
JP4077383B2 true JP4077383B2 (ja) | 2008-04-16 |
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JP2003318362A Expired - Fee Related JP4077383B2 (ja) | 2003-09-10 | 2003-09-10 | 能動型振動騒音制御装置 |
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US (1) | US7536018B2 (ja) |
EP (1) | EP1515304B1 (ja) |
JP (1) | JP4077383B2 (ja) |
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