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1.发明申请公开(公告)号：US20080162072A1
公开(公告)日：2008-07-03
申请号：US11646401
申请日：2006-12-28
IPC分类号： G01M19/00
CPC分类号： G10K11/178 , G10K2210/128 , G10K2210/503
摘要： A method for measuring performance of a noise cancellation system that is operable to cancel noise is provided. The method includes generating a first model of a target noise. The first model represents the target noise in a form that is received at a location remote from a noise source of the target noise and within a defined environment. The method also includes generating a second model of a cancellation noise. The cancellation noise is configured to at least partially cancel the target noise when combined with the target noise. The second model represents the cancellation noise in a form that is received at the location. The method also includes determining, using the first model and the second model, a cancellation error value indicative of only a portion of the target noise that remains when the target noise and the cancellation noise are combined. The method also includes transmitting the determined cancellation error value to a module operable to monitor a performance level of the noise cancellation system.
摘要翻译： 提供了一种用于测量可消除噪声的噪声消除系统的性能的方法。 该方法包括产生目标噪声的第一模型。 第一个模型表示在远离目标噪声的噪声源并且在定义的环境内的位置处接收的形式的目标噪声。 该方法还包括产生消除噪声的第二模型。 消除噪声被配置为当与目标噪声组合时至少部分地消除目标噪声。 第二个模型表示在该位置接收到的形式中的消除噪声。 该方法还包括使用第一模型和第二模型来确定指示目标噪声和消除噪声组合时剩余的目标噪声的一部分的抵消误差值。 该方法还包括将确定的抵消误差值发送到可操作以监视噪声消除系统的性能水平的模块。
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公开(公告)号：US20080159553A1
公开(公告)日：2008-07-03
申请号：US11646417
申请日：2006-12-28
IPC分类号： G10K11/16
CPC分类号： G10K11/178 , G10K2210/1282 , G10K2210/3052 , G10K2210/503
摘要： A method for detecting failure in a noise cancellation system is provided. The noise cancellation system is operable to at least partially cancel an unwanted noise produced by a noise source. The method includes receiving a cancellation noise signal from the noise cancellation system. The cancellation noise signal represents a cancellation noise that, when combined with a target noise, is operable to at least partially cancel the target noise. The method also includes receiving an error signal approximately representing a portion of the target noise that remains after the cancellation noise and the target noise are combined. The method also includes determining whether the signal level changed or remains unchanged for each of the received cancellation noise signal and the error signal. The method also includes assigning a failure state of the noise cancellation system based on the determination and initiating a remedial measure that corresponds with the assigned failure state.
摘要翻译： 提供了一种用于检测噪声消除系统中的故障的方法。 噪声消除系统可操作以至少部分地消除由噪声源产生的不期望的噪声。 该方法包括从噪声消除系统接收消除噪声信号。 抵消噪声信号表示抵消噪声，当与目标噪声组合时，其可操作以至少部分地消除目标噪声。 该方法还包括接收大致表示在消除噪声之后保持的目标噪声的一部分并且组合目标噪声的误差信号。 该方法还包括确定对于接收到的消除噪声信号和误差信号中的每个信号电平是否改变或保持不变。 该方法还包括基于该确定来分配噪声消除系统的故障状态，并启动与所分配的故障状态相对应的补救措施。
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3.发明申请Methods and systems for determining the effectiveness of active noise cancellation 有权确定主动噪声消除有效性的方法和系统公开(公告)号：US20080159549A1
公开(公告)日：2008-07-03
申请号：US11646402
申请日：2006-12-28
IPC分类号： H04R29/00
CPC分类号： H04R5/02 , G10K11/178
摘要： A method for controlling a noise cancellation system having an adaptive control portion is provided. The noise cancellation system is operable to generate a cancellation noise configured to at least partially cancel an unwanted noise in a defined environment. The adaptive control portion is operable to adjust the operation of the noise cancellation system based on a level of unwanted noise that remains when the cancellation noise and the unwanted noise are combined. The method includes receiving an error signal representing a portion of a noise not cancelled by a cancellation noise, where the cancellation noise is generated from the noise cancellation system. The method also includes determining whether the level of the error signal exceeds a first threshold value for a first predetermined period of time. The method also includes calculating a crest factor using the error signal. The method also includes determining whether the crest factor exceeds a second threshold value. The method also includes deactivating the adaptive control system and continuing to operate the noise cancellation system if the error value exceeds the first threshold value for the predetermined period of time and the crest factor exceeds the second threshold value.
摘要翻译： 提供了一种用于控制具有自适应控制部分的噪声消除系统的方法。 噪声消除系统可操作以产生消除噪声，其被配置为至少部分地消除限定环境中的不期望的噪声。 自适应控制部分可操作以基于当消除噪声和不需要的噪声被组合时保持的不需要的噪声的水平来调整噪声消除系统的操作。 该方法包括接收表示未被消除噪声抵消的噪声的一部分的误差信号，其中从噪声消除系统产生抵消噪声。 该方法还包括在第一预定时间段内确定误差信号的电平是否超过第一阈值。 该方法还包括使用误差信号计算波峰因数。 该方法还包括确定波峰因数是否超过第二阈值。 如果误差值超过预定时间段的第一阈值并且波峰因数超过第二阈值，该方法还包括去激活自适应控制系统并继续操作噪声消除系统。
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4.发明申请Multi-Channel Active Control System and Methods for the Reduction of Tonal Noise from an Axial Fan 审中-公开多通道主动控制系统和降低轴向风机噪音的方法公开(公告)号：US20110046794A1
公开(公告)日：2011-02-24
申请号：US12675714
申请日：2008-08-28
CPC分类号： G10K11/178 , G10K2210/11 , G10K2210/3029
摘要： A method of optimizing placement of a control source relative to a noise source includes establishing a first pool of constructive chromosomes, each constructive chromosome defining a potential spatial position for the control source in an acoustic space and each constructive chromosome including a plurality of constructive genes having a value-based value that represents an ordinate related to the potential spatial position. A second pool of constructive chromosomes is established by manipulating the value-based values of constructive genes from at least a portion of the plurality of constructive chromosomes of the first pool to create a plurality of modified constructive chromosomes, and evaluating a fitness characteristic of at least some of the constructive chromosomes from the first pool and/or at least some of the constructive chromosomes from the second pool. A portion of the constructive chromosomes are eliminated from the first and/or second pools based on the fitness characteristic.
摘要翻译： 优化控制源相对于噪声源的放置的方法包括建立第一建构性染色体池，每个构建性染色体在声学空间中定义控制源的潜在空间位置，并且每个构建性染色体包括多个构建性基因，其具有 表示与潜在空间位置相关的纵坐标的基于值的值。 第二个建设性染色体池是通过从第一个池的多个建设性染色体的至少一部分操纵建构性基因的基于价值的值来建立的，以创建多个修饰的构建性染色体，并评估至少 来自第一个池的一些构建性染色体和/或来自第二个池的至少一些构建性染色体。 基于适应度特征，从第一和/或第二池中消除一部分结构性染色体。
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5.发明授权Multi-channel active control system and method for the reduction of tonal noise from an axial fan 有权多通道主动控制系统及降低轴流风扇噪音的方法公开(公告)号：US07272234B2
公开(公告)日：2007-09-18
申请号：US10407915
申请日：2003-04-04
申请人： Scott D. Sommerfeldt , Kent L. Gee
发明人： Scott D. Sommerfeldt , Kent L. Gee
CPC分类号： G10K11/178
摘要： A multi-channel active noise control system and method of reducing tonal noise emanating from a tonal noise source are disclosed. The system may include an adaptive controller, a plurality of loudspeakers driven by the loudspeaker, one or more microphones for generating one or more error signals to feedback to the adaptive controller and optionally a reference signal source to provide the adaptive controller with frequency information associated with the tonal noise source. The system and method of the present invention are applicable to any tonal noise source, including but not limited to axial fans.
摘要翻译： 公开了一种减少从音调噪声源发出的音调噪声的多声道主动噪声控制系统和方法。 该系统可以包括自适应控制器，由扬声器驱动的多个扬声器，一个或多个麦克风，用于产生一个或多个误差信号以反馈给自适应控制器和可选地参考信号源，以向自适应控制器提供与 音调噪声源。 本发明的系统和方法可应用于任何音调噪声源，包括但不限于轴流风扇。
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6.发明授权公开(公告)号：US08340318B2
公开(公告)日：2012-12-25
申请号：US11646401
申请日：2006-12-28
IPC分类号： H04B15/00
CPC分类号： G10K11/178 , G10K2210/128 , G10K2210/503
摘要： A method for measuring performance of a noise cancellation system that is operable to cancel noise is provided. The method includes generating a first model of a target noise. The first model represents the target noise in a form that is received at a location remote from a noise source of the target noise and within a defined environment. The method also includes generating a second model of a cancellation noise. The cancellation noise is configured to at least partially cancel the target noise when combined with the target noise. The second model represents the cancellation noise in a form that is received at the location. The method also includes determining, using the first model and the second model, a cancellation error value indicative of only a portion of the target noise that remains when the target noise and the cancellation noise are combined. The method also includes transmitting the determined cancellation error value to a module operable to monitor a performance level of the noise cancellation system.
摘要翻译： 提供了一种用于测量可消除噪声的噪声消除系统的性能的方法。 该方法包括产生目标噪声的第一模型。 第一个模型表示在远离目标噪声的噪声源并且在定义的环境内的位置处接收的形式的目标噪声。 该方法还包括产生消除噪声的第二模型。 消除噪声被配置为当与目标噪声组合时至少部分地消除目标噪声。 第二个模型表示在该位置接收到的形式中的消除噪声。 该方法还包括使用第一模型和第二模型来确定指示目标噪声和消除噪声组合时剩余的目标噪声的一部分的抵消误差值。 该方法还包括将确定的抵消误差值发送到可操作以监视噪声消除系统的性能水平的模块。
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公开(公告)号：US08068616B2
公开(公告)日：2011-11-29
申请号：US11646417
申请日：2006-12-28
CPC分类号： G10K11/178 , G10K2210/1282 , G10K2210/3052 , G10K2210/503
摘要： A method for detecting failure in a noise cancellation system is provided. The noise cancellation system is operable to at least partially cancel an unwanted noise produced by a noise source. The method includes receiving a cancellation noise signal from the noise cancellation system. The cancellation noise signal represents a cancellation noise that, when combined with a target noise, is operable to at least partially cancel the target noise. The method also includes receiving an error signal approximately representing a portion of the target noise that remains after the cancellation noise and the target noise are combined. The method also includes determining whether the signal level changed or remains unchanged for each of the received cancellation noise signal and the error signal. The method also includes assigning a failure state of the noise cancellation system based on the determination and initiating a remedial measure that corresponds with the assigned failure state.
摘要翻译： 提供了一种用于检测噪声消除系统中的故障的方法。 噪声消除系统可操作以至少部分地消除由噪声源产生的不期望的噪声。 该方法包括从噪声消除系统接收消除噪声信号。 抵消噪声信号表示抵消噪声，当与目标噪声组合时，其可操作以至少部分地消除目标噪声。 该方法还包括接收大致表示在消除噪声之后保持的目标噪声的一部分并且组合目标噪声的误差信号。 该方法还包括确定对于接收到的消除噪声信号和误差信号中的每个信号电平是否改变或保持不变。 该方法还包括基于该确定来分配噪声消除系统的故障状态，并启动与所分配的故障状态相对应的补救措施。
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公开(公告)号：US08270625B2
公开(公告)日：2012-09-18
申请号：US11951945
申请日：2007-12-06
CPC分类号： G10K11/178 , G10K2210/30232
摘要： Methods for modeling the secondary path of an ANC system to improve convergence and tracking during noise control operation, and their associated uses are provided. In one aspect, for example, a method for modeling a secondary path for an active noise control system is provided. Such a method may include receiving a reference signal, filtering the reference signal with an initial secondary path model to obtain a filtered reference signal, calculating an autocorrelation matrix from the filtered reference signal, and calculating a plurality of eigenvalues from the autocorrelation matrix. The method may further include calculating a maximum difference between the plurality of eigenvalues and iterating a test model to determine an optimized secondary path model having a plurality of optimized eigenvalues that have a minimized difference that is less than the maximum difference of the plurality of eigenvalues, such that the optimized secondary path model may be utilized in the active noise control system.
摘要翻译： 提供了用于建模ANC系统的二次路径以改善噪声控制操作期间的收敛和跟踪及其相关用途的方法。 在一个方面，例如，提供了一种用于为主动噪声控制系统建模辅助路径的方法。 这种方法可以包括接收参考信号，用初始次路径模型对参考信号进行滤波以获得经滤波的参考信号，从滤波的参考信号计算自相关矩阵，以及根据自相关矩阵计算多个特征值。 该方法还可以包括计算多个特征值之间的最大差异并迭代测试模型以确定具有多个优化特征值的优化次级路径模型，其具有小于多个特征值的最大差异的最小差异， 使得优化的次级路径模型可以在有源噪声控制系统中使用。
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9.发明授权Methods and systems for determining the effectiveness of active noise cancellation 有权确定主动噪声消除有效性的方法和系统公开(公告)号：US07933420B2
公开(公告)日：2011-04-26
申请号：US11646402
申请日：2006-12-28
IPC分类号： A61F11/06
CPC分类号： H04R5/02 , G10K11/178
摘要： A method for controlling a noise cancellation system having an adaptive control portion is provided. The noise cancellation system is operable to generate a cancellation noise configured to at least partially cancel an unwanted noise in a defined environment. The adaptive control portion is operable to adjust the operation of the noise cancellation system based on a level of unwanted noise that remains when the cancellation noise and the unwanted noise are combined. The method includes receiving an error signal representing a portion of a noise not cancelled by a cancellation noise, where the cancellation noise is generated from the noise cancellation system. The method also includes determining whether the level of the error signal exceeds a first threshold value for a first predetermined period of time. The method also includes calculating a crest factor using the error signal. The method also includes determining whether the crest factor exceeds a second threshold value. The method also includes deactivating the adaptive control system and continuing to operate the noise cancellation system if the error value exceeds the first threshold value for the predetermined period of time and the crest factor exceeds the second threshold value.
摘要翻译： 提供了一种用于控制具有自适应控制部分的噪声消除系统的方法。 噪声消除系统可操作以产生消除噪声，其被配置为至少部分地消除限定环境中的不期望的噪声。 自适应控制部分可操作以基于当消除噪声和不需要的噪声被组合时保持的不需要的噪声的水平来调整噪声消除系统的操作。 该方法包括接收表示未被消除噪声抵消的噪声的一部分的误差信号，其中从噪声消除系统产生抵消噪声。 该方法还包括在第一预定时间段内确定误差信号的电平是否超过第一阈值。 该方法还包括使用误差信号计算波峰因数。 该方法还包括确定波峰因数是否超过第二阈值。 如果误差值超过预定时间段的第一阈值并且波峰因数超过第二阈值，该方法还包括去激活自适应控制系统并继续操作噪声消除系统。
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公开(公告)号：US20080144853A1
公开(公告)日：2008-06-19
申请号：US11951945
申请日：2007-12-06
IPC分类号： A61F11/06
CPC分类号： G10K11/178 , G10K2210/30232
摘要： Methods for modeling the secondary path of an ANC system to improve convergence and tracking during noise control operation, and their associated uses are provided. In one aspect, for example, a method for modeling a secondary path for an active noise control system is provided. Such a method may include receiving a reference signal, filtering the reference signal with an initial secondary path model to obtain a filtered reference signal, calculating an autocorrelation matrix from the filtered reference signal, and calculating a plurality of eigenvalues from the autocorrelation matrix. The method may further include calculating a maximum difference between the plurality of eigenvalues and iterating a test model to determine an optimized secondary path model having a plurality of optimized eigenvalues that have a minimized difference that is less than the maximum difference of the plurality of eigenvalues, such that the optimized secondary path model may be utilized in the active noise control system.
摘要翻译： 提供了用于建模ANC系统的二次路径以改善噪声控制操作期间的收敛和跟踪及其相关用途的方法。 在一个方面，例如，提供了一种用于为主动噪声控制系统建模辅助路径的方法。 这种方法可以包括接收参考信号，用初始次路径模型对参考信号进行滤波以获得经滤波的参考信号，从滤波的参考信号计算自相关矩阵，以及根据自相关矩阵计算多个特征值。 该方法还可以包括计算多个特征值之间的最大差异并迭代测试模型以确定具有多个优化特征值的优化次级路径模型，其具有小于多个特征值的最大差异的最小差异， 使得优化的次级路径模型可以在有源噪声控制系统中使用。
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