专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

WO2003009275A1 ACTIVE NOISE CANCELLATION SYSTEM UTILIZING A SIGNAL DELAY TO ACCOMMODATE NOISE PHASE CHANGE 审中-公开
标题翻译：主动噪声消除系统利用信号延迟来调节噪声相位变化
公开(公告)号：WO2003009275A1
公开(公告)日：2003-01-30
申请号：PCT/CA2002/001098
申请日：2002-07-17
申请人： SIEMENS VDO AUTOMOTIVE INC.
发明人： HARVEY, Bruce, James
IPC分类号： G10K11/178
CPC分类号： G10K11/178 , G10K2210/101 , G10K2210/112 , G10K2210/121 , G10K2210/1282 , G10K2210/12822 , G10K2210/3032 , G10K2210/3044 , G10K2210/3229
摘要： An active noise cancellation system (20) for use with an assembly (22) includes adjusting the phase of a reference signal an amount that corresponds to a change in phase of the noise (26) within the system. A non-acoustic sensor (44) provides a signal regarding a position or frequency of a source of noise (28) (i.e. RPM's of a vehicle engine). Control electronics (32) provide a reference signal to the system noise canceling actuator (30) (i.e., a speaker) that includes the phase adjustment responsive to the sensor signal. In one example, the reference signal is delayed an amount of time corresponding to the phase change in the noise (26) as it travels through the system (22). In another example, the phase angle is adjusted.
摘要翻译：用于组件（22）的主动噪声消除系统（20）包括调整参考信号的相位与对应于系统内的噪声（26）的相位变化的量。非声学传感器（44）提供关于噪声源（28）（即，车辆发动机的RPM）的位置或频率的信号。控制电子设备（32）向系统噪声消除致动器（30）（即，扬声器）提供参考信号，其包括响应于传感器信号的相位调整。在一个示例中，当参考信号行进通过系统（22）时，参考信号被延迟与噪声（26）中的相位变化相对应的时间量。在另一示例中，调整相位角。

2. 发明申请

WO1996011465A1 ACTIVE CONTROL OF AIRCRAFT ENGINE INLET NOISE USING COMPACT SOUND SOURCES AND DISTRIBUTED ERROR SENSORS 审中-公开
标题翻译：使用紧凑声源和分布式错误传感器对飞机发动机入口噪声的主动控制
公开(公告)号：WO1996011465A1
公开(公告)日：1996-04-18
申请号：PCT/US1995012541
申请日：1995-10-06
申请人： THE CENTER FOR INNOVATIVE TECHNOLOGY
发明人： THE CENTER FOR INNOVATIVE TECHNOLOGY , BURDISSO, Ricardo , FULLER, Chris, R. , O'BRIEN, Walter, F. , THOMAS, Russell, H. , DUNGAN, Mary, E.
IPC分类号： G10K11/16
CPC分类号： G10K11/178 , F05B2260/962 , G10K2210/107 , G10K2210/112 , G10K2210/121 , G10K2210/1281 , G10K2210/1291 , G10K2210/3032 , G10K2210/3042 , G10K2210/3045 , G10K2210/3046 , G10K2210/3226 , G10K2210/32271 , G10K2210/3229 , G10K2210/32291 , G10K2210/511
摘要： An active noise control system using a compact sound source is effective to reduce aircraft engine duct noise. The fan noise from a turbofan engine is controlled using an adaptive filtered-x algorithm. Single, multi channel control systems are used to control the fan blade passage frequency (BPF) tone and the BPF tone and the first harmonic of the BPF tone for a plane wave excitation. The multi channel control system is used to control fan tones and a high pressure compressor BPF tone simultaneously, and any spinning mode. A compact sound source is employed to generate the control field. This compact sound source consists of an array of identical thin, cylindrically curved panels (125) with an inner radius of curvature corresponding to that of the engine inlet. These panels are flush mounted inside the inlet duct (Inlet Wall) and sealed on all edges to prevent leakage around the panel.
摘要翻译：使用紧凑声源的主动噪声控制系统有效地减少飞机发动机管道噪声。来自涡扇发动机的风扇噪声使用自适应滤波x算法进行控制。单通道多通道控制系统用于控制风扇叶片通过频率（BPF）音调和BPF音调以及用于平面波激励的BPF音调的一次谐波。多通道控制系统用于同时控制风扇音调和高压压缩机BPF音调，以及任何旋转模式。使用紧凑的声源来产生控制场。这种紧凑的声源由具有与发动机入口的内部曲率的内半径相同的薄的圆柱形曲面板（125）组成。这些面板齐平地安装在入口管道（入口壁）的内部，并在所有边缘上密封，以防止面板周围的泄漏。

3. 发明申请

WO1991010226A1 ACTIVE VIBRATION REDUCING SYSTEM 审中-公开
标题翻译：主动减振系统
公开(公告)号：WO1991010226A1
公开(公告)日：1991-07-11
申请号：PCT/GB1990002021
申请日：1990-12-24
申请人： NOISE CANCELLATION TECHNOLOGIES INC. , ROSS, Colin, Fraser
发明人： NOISE CANCELLATION TECHNOLOGIES INC.
IPC分类号： G10K11/16
CPC分类号： G10K11/178 , G10K2210/121 , G10K2210/125 , G10K2210/128 , G10K2210/1281 , G10K2210/12822 , G10K2210/129 , G10K2210/3019 , G10K2210/3032 , G10K2210/511
摘要： An active vibration reducing system for controlling the vibration generated by a source of periodic or quasi-periodic vibration is characterised in that a weighted sum of the output of at least two sinusoidal waveform generators each synchronised to the frequency of the source of original vibration to generate harmonics of the frequency of the source, is supplied to at least one actuator (5) which generates additional vibration, sensor means (6) is used to monitor the effect of the additional vibration on the original vibration and the weighting of the sum of the outputs is adjusted so that within a defined region the amplitude of the combined vibration is reduced.
摘要翻译：用于控制由周期性或准周期性振动源产生的振动的主动减振系统的特征在于，至少两个正弦波形发生器的输出的加权和与每个原始振动源的频率同步以产生源的频率的谐波被提供给产生附加振动的至少一个致动器（5），传感器装置（6）用于监视附加振动对原始振动的影响，以及调整输出，使得在限定的区域内组合的振动的振幅减小。

4. 发明申请

WO2014163966A1 MOTOR VEHICLE ACTIVE NOISE REDUCTION 审中-公开
标题翻译：电动车辆主动噪声减少
公开(公告)号：WO2014163966A1
公开(公告)日：2014-10-09
申请号：PCT/US2014/019359
申请日：2014-02-28
申请人： BOSE CORPORATION
发明人： PAN, Davis Y. , GANESHKUMAR, Alaganandan
IPC分类号： G10K11/178
CPC分类号： H04R1/00 , G10K11/178 , G10K11/1783 , G10K11/17854 , G10K11/17883 , G10K2210/1282 , G10K2210/3032 , G10K2210/3033 , G10K2210/3056 , H04R1/1083
摘要： A device and method that is configured to operate an active noise reduction system for a motor vehicle, where there is an active noise reduction system input signal that is related to the vehicle engine operation, and where the active noise reduction system comprises one or more adaptive filters that output noise reduction signals that are used to drive one or more transducers with their outputs directed to reduce engine noise. The engine harmonic noise level is estimated from the input signal that is related to the vehicle engine operation, and the output of the transducers is limited based on the estimate of the engine harmonic noise level.
摘要翻译：一种被配置为操作用于机动车辆的有源降噪系统的装置和方法，其中存在与车辆发动机操作有关的主动降噪系统输入信号，并且其中主动降噪系统包括一个或多个自适应滤波器，其输出用于驱动一个或多个换能器的降噪信号，其输出被引导以减少发动机噪声。根据与车辆发动机运转相关的输入信号估计发动机谐波噪声电平，并且基于发动机谐波噪声电平的估计来限制换能器的输出。

5. 发明申请

WO02069316A3 SYSTEM FOR COMPUTATIONALLY EFFICIENT ACTIVE CONTROL OF TONAL SOUND OR VIBRATION 审中-公开
标题翻译：用于计算有效控制声压或振动的系统
公开(公告)号：WO02069316A3
公开(公告)日：2003-05-01
申请号：PCT/US0205916
申请日：2002-02-27
申请人： SIKORSKY AIRCRAFT CORP
发明人： WELSH WILLIAM ARTHUR , MACMARTIN DOUGLAS G , FINN ALAN M
IPC分类号： G05B5/01 , G10K11/178
CPC分类号： G05B5/01 , G05B21/02 , G10K11/178 , G10K2210/121 , G10K2210/1281 , G10K2210/3012 , G10K2210/3032 , G10K2210/3051 , G10K2210/3053 , G10K2210/321
摘要： A noise or vibration control system reduces a sampling rate and reduces a control rate to improve computation efficiency. The present invention permits the use of a sample frequency (fs) that is less than twice the frequency of interest (fd). The sensed signals are filtered to extract a particular frequency range with a lower bound given by (2n-1)*fs/2 and an upper bound given by (2n+1)*fs/2, where n is an integer chosen so that the frequency of interest (fd) is within the extracted frequency range. The control commands are also calculated at a reduced rate, which is dependent upon the bandwidth of the tone, rather than the absolute frequency of the tone. Rather than updating the control signals directly on the sampled sensor data yk as it enters the computer, the control computations are done on the harmonic ak and bk, or equivalently on the magnitude and phase.
摘要翻译：噪声或振动控制系统降低采样率并降低控制速率以提高计算效率。本发明允许使用小于感兴趣频率（fd）的两倍的采样频率（fs）。对所感测的信号进行滤波以提取具有由（2n-1）* fs / 2给出的下限和由（2n + 1）* fs / 2给出的上限的特定频率范围，其中n是选择的整数，使得感兴趣的频率（fd）在提取的频率范围内。控制命令也以降低的速率计算，这取决于音调的带宽，而不是音调的绝对频率。在采样传感器数据yk进入计算机时，不是直接更新控制信号，而是在谐波ak和bk上进行控制计算，或等效于幅度和相位。

6. 发明申请

WO2002069316A2 SYSTEM FOR COMPUTATIONALLY EFFICIENT ACTIVE CONTROL OF TONAL SOUND OR VIBRATION 审中-公开
标题翻译：用于计算有效控制声压或振动的系统
公开(公告)号：WO2002069316A2
公开(公告)日：2002-09-06
申请号：PCT/US2002/005916
申请日：2002-02-27
申请人： SIKORSKY AIRCRAFT CORPORATION
发明人： WELSH, William, Arthur , MACMARTIN, Douglas, G. , FINN, Alan, M.
IPC分类号： G10K
CPC分类号： G05B5/01 , G05B21/02 , G10K11/178 , G10K2210/121 , G10K2210/1281 , G10K2210/3012 , G10K2210/3032 , G10K2210/3051 , G10K2210/3053 , G10K2210/321
摘要： A noise or vibration control system reduces a sampling rate and reduces a control rate to improve computation efficiency. The present invention permits the use of a sample frequency (f s ) that is less than twice the frequency of interest (f d ). The sensed signals are filtered to extract a particular frequency range with a lower bound given by (2n-1)*f s /2 and an upper bound given by (2n+1)*f s /2, where n is an integer chosen so that the frequency of interest (f d ) is within the extracted frequency range. The control commands are also calculated at a reduced rate, which is dependent upon the bandwidth of the tone, rather than the absolute frequency of the tone. Rather than updating the control signals directly on the sampled sensor data y k as it enters the computer, the control computations are done on the harmonic a k and b k , or equivalently on the magnitude and phase.
摘要翻译：噪声或振动控制系统降低采样率并降低控制速率以提高计算效率。本发明允许使用小于感兴趣频率（fd）的两倍的采样频率（fs）。所感测的信号被滤波以提取具有由（2n-1）* fs / 2给出的下限和由（2n + 1）* fs / 2给出的上限的特定频率范围，其中n是选择的整数，使得感兴趣的频率（fd）在提取的频率范围内。控制命令也以降低的速率计算，这取决于音调的带宽，而不是音调的绝对频率。在采样传感器数据yk进入计算机时，不是直接更新控制信号，而是在谐波ak和bk上进行控制计算，或等效于幅度和相位。

7. 发明申请

WO1990013108A1 ACTIVE SOUND AND/OR VIBRATION CONTROL 审中-公开
标题翻译：主动声和/或振动控制
公开(公告)号：WO1990013108A1
公开(公告)日：1990-11-01
申请号：PCT/GB1990000617
申请日：1990-04-20
申请人： TOPEXPRESS LIMITED , EATWELL, Graham, Paul , DORLING, Christopher, Mark , HODSON, William, Richard
发明人： TOPEXPRESS LIMITED
IPC分类号： G10K11/16
CPC分类号： G10K11/178 , G10K2210/121 , G10K2210/3024 , G10K2210/3025 , G10K2210/3032 , G10K2210/3042 , G10K2210/3046 , G10K2210/3051
摘要： An active sound or vibration control system for compensating noise or vibration arising from a periodic source of changing periodicity, wherein sensors (6) sense the existing noise and vibration, the sensor signals are sampled several times per cycle by an ADC (8) triggered by a signal output from a sensor (3) detecting the position of the source in its cycle, the sampled signals are transformed into compensation actuator drive signal values by a series of transform and adaptation modules (11 to 13, 15) based on algorithms dependent on the frequency of the source, and the drive signal values are stored in a memory means (1) continually updated by the values derived from the sampled sensor signals.

8. 发明申请

WO2015091279A1 ACTIVE NOISE CONTROL SYSTEM 审中-公开
标题翻译：主动噪声控制系统
公开(公告)号：WO2015091279A1
公开(公告)日：2015-06-25
申请号：PCT/EP2014/077603
申请日：2014-12-12
申请人： HARMAN BECKER AUTOMOTIVE SYSTEMS GMBH
发明人： CHRISTOPH, Markus , WURM, Michael
IPC分类号： G10K11/178
CPC分类号： G10K11/1786 , G10K11/178 , G10K2210/3016 , G10K2210/3023 , G10K2210/3028 , G10K2210/3032 , G10K2210/3046
摘要： The present disclosure relates to an active noise control (ANC) system. In accordance with one aspect of the invention, the ANC system includes a plurality of microphones and a plurality of loudspeakers. Each microphone is configured to provide an error signal that represents a residual noise signal. Each loudspeaker is configured to receive a loudspeaker signal and to radiate a respective acoustic signal. The ANC system further includes an adaptive filter bank, which is supplied with a reference signal and configured to filter the reference signal to provide the loudspeaker signals as filtered signals. The filter characteristics of the adaptive filter bank are adapted such that a cost function is minimized. The cost function thereby represents the weighted sum of the squared error signals.
摘要翻译：本公开涉及一种主动噪声控制（ANC）系统。根据本发明的一个方面，ANC系统包括多个麦克风和多个扬声器。每个麦克风被配置为提供表示残余噪声信号的误差信号。每个扬声器被配置为接收扬声器信号并辐射相应的声信号。 ANC系统还包括自适应滤波器组，其被提供有参考信号并且被配置为对参考信号进行滤波，以将扬声器信号提供为滤波信号。自适应滤波器组的滤波器特性被适配成使得成本函数最小化。因此，成本函数表示平方误差信号的加权和。

9. 发明申请

WO2015026568A1 INSTABILITY DETECTION AND CORRECTION IN SINUSOIDAL ACTIVE NOISE REDUCTION SYSTEMS 审中-公开
标题翻译： SINUSOIDAL主动噪声减少系统的不稳定性检测与校正
公开(公告)号：WO2015026568A1
公开(公告)日：2015-02-26
申请号：PCT/US2014/050682
申请日：2014-08-12
申请人： BOSE CORPORATION
发明人： GANESHKUMAR, Alaganandan
IPC分类号： G10K11/178
CPC分类号： G10K11/002 , G10K11/178 , G10K2210/1282 , G10K2210/3028 , G10K2210/3032 , G10K2210/3055 , G10K2210/503
摘要： A method for operating an active noise reduction system that is designed to reduce the harmonic or sinusoidal noise emanating from a rotating device, where there is an active noise reduction system input signal that is related to the frequency of the noise to be reduced, and where the active noise reduction system comprises one or more adaptive filters that output a generally sinusoidal noise reduction signal that is used to drive one or more transducers with their outputs directed to reduce the noise. Distortions of the noise reduction signal are detected. A distortion is based at least in part on differences between the frequency of the noise reduction signal and the frequency of the harmonic noise. The noise reduction signal is altered based on the detected distortion.
摘要翻译：一种用于操作有源降噪系统的方法，其被设计为减少从旋转装置发出的谐波或正弦噪声，其中存在与待降低的噪声的频率有关的主动降噪系统输入信号，以及其中有源噪声降低系统包括一个或多个自适应滤波器，其输出用于驱动一个或多个换能器的大致正弦降噪信号，其输出被引导以减少噪声。检测出降噪信号的失真。失真至少部分地基于降噪信号的频率和谐波噪声的频率之间的差异。基于检测到的失真改变降噪信号。

10. 发明申请

WO2014158700A1 ACTIVE REDUCTION OF HARMONIC NOISE FROM MULTIPLE ROTATING DEVICES 审中-公开
标题翻译：主动减少多个旋转装置中的谐波噪声
公开(公告)号：WO2014158700A1
公开(公告)日：2014-10-02
申请号：PCT/US2014/019354
申请日：2014-02-28
申请人： BOSE CORPORATION
发明人： GANESHKUMAR, Alaganandan , KLUG, Dennis, D.
IPC分类号： G10K11/178
CPC分类号： H04R3/002 , G10K11/178 , G10K11/17854 , G10K11/17883 , G10K2210/1282 , G10K2210/3028 , G10K2210/3032 , G10K2210/3054
摘要： A system and method for reducing noise caused by two or more rotating devices by taking in input signals with frequencies that are related to the rotation rates of the rotating devices, and causing one or more loudspeakers to produce sounds that are at about the same frequencies as the noise and of substantially opposite phase. There is a noise canceller associated with each rotating device. Each noise canceller includes a harmonic frequency computer that computes and provides a harmonic frequency to a harmonic sine wave generator that generates an output sine wave. Each noise canceller also has an adaptive filter to create a noise reduction signal that is used to drive one or more transducers to reduce noise caused by the rotating devices. There is an overlap detector that compares the harmonic frequencies and, based on their proximity, alters the operation of one or more adaptive filters.
摘要翻译：一种用于通过接收与旋转装置的旋转速率相关的频率的输入信号来减少由两个或更多个旋转装置引起的噪声的系统和方法，并且使一个或多个扬声器产生与大约相同频率的声音噪声和基本相反的相位。每个旋转装置都有一个噪音消除器。每个噪声消除器包括一个谐波频率计算机，该谐波频率计算机为谐波正弦波发生器计算并提供谐波频率，以产生输出正弦波。每个噪声消除器还具有自适应滤波器以产生用于驱动一个或多个换能器以降低由旋转装置引起的噪声的降噪信号。存在重叠检测器，其比较谐波频率，并且基于它们的接近度改变一个或多个自适应滤波器的操作。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式