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1. 发明授权

EP0492680B1 Method and apparatus for attenuating noise 失效
标题翻译：用于噪声衰减的方法和装置。
公开(公告)号：EP0492680B1
公开(公告)日：1995-07-19
申请号：EP91203005.3
申请日：1991-11-19
申请人： GENERAL MOTORS CORPORATION
发明人： Pfaff, Donald Paul , Kapsokavathis, Nick S.
IPC分类号： H03H21/00 , G10K11/16
CPC分类号： F01N1/065 , G10K11/178 , G10K2210/121 , G10K2210/12822 , G10K2210/3037 , G10K2210/3039 , G10K2210/3045 , G10K2210/3046 , G10K2210/3211 , H03H21/0012
摘要： A method and apparatus are described for controlling output saturation in adaptive digital filters (30) used in active noise control systems. A practical adaptive filter (30) has a specified maximum value for its output signal, above which the output signal becomes clipped and filter output saturation occurs. According to the described method and apparatus, the filter output signal value (OUTPUT(n)) is monitored to detect the occurrence of filter output saturation. Then, the filter (30) is adjusted to reduce the value of the output signal (OUTPUT(n)), when output saturation is detected. Based upon the detection of filter output saturation, a power reference level is established to estimate the maximum average power that the output signal (OUTPUT(n)) can contain without causing saturation. The filter weighting coefficients are then adjusted in accordance with the difference between the established power reference level and a computed average power associated with the filter output signal (OUTPUT(n)).

2. 发明公开

EP0470656A1 Method and apparatus for attenuating engine noise 失效
标题翻译： Verfahren und Einrichtung zurDämpfungvonMotorgeräusch。
公开(公告)号：EP0470656A1
公开(公告)日：1992-02-12
申请号：EP91201872.8
申请日：1991-07-16
申请人： GENERAL MOTORS CORPORATION
发明人： Pfaff, Donald Paul , Kapsokavathis, Nick S.
IPC分类号： F01N1/06 , F02M35/12 , G10K11/16
CPC分类号： F02M35/125 , F01N1/065 , F02B27/001 , F02M35/10373 , G10K11/178 , G10K2210/121 , G10K2210/1291 , G10K2210/3039 , G10K2210/3045 , G10K2210/3046 , G10K2210/3211 , G10K2210/3212 , Y02T10/146
摘要： Apparatus for attenuating noise generated by an internal combustion engine (10), which comprises an exhaust system (14) and an air intake system (12) including a throttle valve (16) for regulating air flow to the engine; the apparatus comprising a microphone (24) for deriving a noise value (INPUT) representative of the noise generated by the engine; a throttle position sensor (18) for deriving a loading valve (TP) indicative of engine loading; and a controller (26) for modulating the amplitude of the noise value as a function of the engine loading value and for attenuating the noise generated by the engine (10) on the basis of the modulated noise value. The apparatus and method improve the response of the system to abrupt changes in engine loading.
摘要翻译：一种用于衰减由内燃机（10）产生的噪声的装置，其包括排气系统（14）和进气系统（12），所述进气系统包括用于调节到所述发动机的气流的节流阀（16）该装置包括用于导出代表由发动机产生的噪声的噪声值（INPUT）的麦克风（24）; 用于导出指示发动机负载的加载阀（TP）的节气门位置传感器（18）; 以及控制器（26），用于根据所述发动机负载值调制所述噪声值的振幅，并且用于基于所述调制噪声值来衰减由所述发动机（10）产生的噪声。该装置和方法提高了系统对发动机负载突然变化的响应。

3. 发明公开

EP0492680A3 Method and apparatus for attenuating noise 失效
标题翻译：抑制噪声的方法和装置
公开(公告)号：EP0492680A3
公开(公告)日：1993-03-31
申请号：EP91203005.3
申请日：1991-11-19
申请人： GENERAL MOTORS CORPORATION
发明人： Pfaff, Donald Paul , Kapsokavathis, Nick S.
IPC分类号： H03H21/00 , G10K11/16
CPC分类号： F01N1/065 , G10K11/178 , G10K2210/121 , G10K2210/12822 , G10K2210/3037 , G10K2210/3039 , G10K2210/3045 , G10K2210/3046 , G10K2210/3211 , H03H21/0012
摘要： A method and apparatus are described for controlling output saturation in adaptive digital filters (30) used in active noise control systems. A practical adaptive filter (30) has a specified maximum value for its output signal, above which the output signal becomes clipped and filter output saturation occurs. According to the described method and apparatus, the filter output signal value (OUTPUT(n)) is monitored to detect the occurrence of filter output saturation. Then, the filter (30) is adjusted to reduce the value of the output signal (OUTPUT(n)), when output saturation is detected. Based upon the detection of filter output saturation, a power reference level is established to estimate the maximum average power that the output signal (OUTPUT(n)) can contain without causing saturation. The filter weighting coefficients are then adjusted in accordance with the difference between the established power reference level and a computed average power associated with the filter output signal (OUTPUT(n)).

4. 发明公开

EP0492680A2 Method and apparatus for attenuating noise 失效
标题翻译： Verfahren undGerätzurLärmdämpfung。
公开(公告)号：EP0492680A2
公开(公告)日：1992-07-01
申请号：EP91203005.3
申请日：1991-11-19
申请人： GENERAL MOTORS CORPORATION
发明人： Pfaff, Donald Paul , Kapsokavathis, Nick S.
IPC分类号： H03H21/00 , G10K11/16
CPC分类号： F01N1/065 , G10K11/178 , G10K2210/121 , G10K2210/12822 , G10K2210/3037 , G10K2210/3039 , G10K2210/3045 , G10K2210/3046 , G10K2210/3211 , H03H21/0012
摘要： A method and apparatus are described for controlling output saturation in adaptive digital filters (30) used in active noise control systems. A practical adaptive filter (30) has a specified maximum value for its output signal, above which the output signal becomes clipped and filter output saturation occurs. According to the described method and apparatus, the filter output signal value (OUTPUT(n)) is monitored to detect the occurrence of filter output saturation. Then, the filter (30) is adjusted to reduce the value of the output signal (OUTPUT(n)), when output saturation is detected. Based upon the detection of filter output saturation, a power reference level is established to estimate the maximum average power that the output signal (OUTPUT(n)) can contain without causing saturation. The filter weighting coefficients are then adjusted in accordance with the difference between the established power reference level and a computed average power associated with the filter output signal (OUTPUT(n)).
摘要翻译：描述了用于控制在有源噪声控制系统中使用的自适应数字滤波器（30）中的输出饱和度的方法和装置。实际的自适应滤波器（30）对于其输出信号具有规定的最大值，其上输出信号被限幅并且滤波器输出饱和发生。根据所描述的方法和装置，监视滤波器输出信号值（OUTPUT（n））以检测滤波器输出饱和度的发生。然后，当检测到输出饱和时，调节滤波器（30）以减小输出信号（OUTPUT（n））的值。基于滤波器输出饱和度的检测，建立功率参考电平以估计输出信号（OUTPUT（n））可以包含的最大平均功率而不引起饱和。然后根据建立的功率参考电平和与滤波器输出信号（OUTPUT（n））相关联的计算的平均功率之间的差来调整滤波器加权系数。

5. 发明授权

EP0479367B1 Method and apparatus for attenuating engine generated noise 失效
标题翻译：用于机器兴奋噪声的阻尼的方法和装置。
公开(公告)号：EP0479367B1
公开(公告)日：1995-08-09
申请号：EP91202477.5
申请日：1991-09-20
申请人： GENERAL MOTORS CORPORATION
发明人： Pfaff, Donald Paul , Parks, Natalie Ann , Kapsokavathis, Nick S.
IPC分类号： G10K11/16
CPC分类号： F01N1/065 , G10K11/178 , G10K2210/121 , G10K2210/3032 , G10K2210/3033 , G10K2210/3039 , G10K2210/3045 , G10K2210/3046 , G10K2210/3211
摘要： A method and apparatus are described for attenuating harmonic noise components contained within noise generated by an internal combustion engine (10), based upon the rotation of the engine (10) during its operating cycle. A signal representing selected multiple harmonic noise components is generated from a table of values, based upon the engine rotation. This signal is adaptively filtered to produce a cancelling waveform, which is superimposed onto the engine noise to attenuate the selected multiple noise harmonics. The method and apparatus are useful for selecting and attenuating dominant noise harmonics produced at different engine speeds or by different types of engines, and the dominant harmonics of different forms of noise produced by the same engine.

6. 发明公开

EP0479367A3 Method and apparatus for attenuating engine generated noise 失效
标题翻译：用于降低发动机噪声的方法和装置
公开(公告)号：EP0479367A3
公开(公告)日：1992-09-02
申请号：EP91202477.5
申请日：1991-09-20
申请人： GENERAL MOTORS CORPORATION
发明人： Pfaff, Donald Paul , Parks, Natalie Ann , Kapsokavathis, Nick S.
IPC分类号： G10K11/16
CPC分类号： F01N1/065 , G10K11/178 , G10K2210/121 , G10K2210/3032 , G10K2210/3033 , G10K2210/3039 , G10K2210/3045 , G10K2210/3046 , G10K2210/3211
摘要： A method and apparatus are described for attenuating harmonic noise components contained within noise generated by an internal combustion engine (10), based upon the rotation of the engine (10) during its operating cycle. A signal representing selected multiple harmonic noise components is generated from a table of values, based upon the engine rotation. This signal is adaptively filtered to produce a cancelling waveform, which is superimposed onto the engine noise to attenuate the selected multiple noise harmonics. The method and apparatus are useful for selecting and attenuating dominant noise harmonics produced at different engine speeds or by different types of engines, and the dominant harmonics of different forms of noise produced by the same engine.

7. 发明公开

EP0479367A2 Method and apparatus for attenuating engine generated noise 失效
标题翻译： Verfahren undGerätzur Dampfung von maschinenerregten Rauschen。
公开(公告)号：EP0479367A2
公开(公告)日：1992-04-08
申请号：EP91202477.5
申请日：1991-09-20
申请人： GENERAL MOTORS CORPORATION
发明人： Pfaff, Donald Paul , Parks, Natalie Ann , Kapsokavathis, Nick S.
IPC分类号： G10K11/16
CPC分类号： F01N1/065 , G10K11/178 , G10K2210/121 , G10K2210/3032 , G10K2210/3033 , G10K2210/3039 , G10K2210/3045 , G10K2210/3046 , G10K2210/3211
摘要： A method and apparatus are described for attenuating harmonic noise components contained within noise generated by an internal combustion engine (10), based upon the rotation of the engine (10) during its operating cycle. A signal representing selected multiple harmonic noise components is generated from a table of values, based upon the engine rotation. This signal is adaptively filtered to produce a cancelling waveform, which is superimposed onto the engine noise to attenuate the selected multiple noise harmonics. The method and apparatus are useful for selecting and attenuating dominant noise harmonics produced at different engine speeds or by different types of engines, and the dominant harmonics of different forms of noise produced by the same engine.
摘要翻译：描述了一种基于发动机（10）在其操作循环期间的旋转来衰减由内燃机（10）产生的噪声中包含的谐波噪声分量的方法和装置。基于发动机旋转，从值表生成表示所选择的多个谐波噪声分量的信号。该信号被自适应地滤波以产生消除波形，其被叠加到发动机噪声上以衰减所选择的多个噪声谐波。该方法和装置可用于选择和衰减在不同发动机速度或不同类型的发动机下产生的主要噪声谐波，以及由相同发动机产生的不同形式的噪声的主要谐波。

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