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31. 发明公开

EP0797184A2 Vibration/noise control system 失效
标题翻译： Schwingungs- /Lärmkontrolleanordnung
公开(公告)号：EP0797184A2
公开(公告)日：1997-09-24
申请号：EP97104676.8
申请日：1997-03-19
申请人： HONDA GIKEN KOGYO KABUSHIKI KAISHA
发明人： Kobayashi, Toshiaki, c/o Honda R & D Co., Ltd.
IPC分类号： G10K11/178
CPC分类号： F16F15/02 , G10K11/178 , G10K2210/121 , G10K2210/1282 , G10K2210/1291 , G10K2210/30232 , G10K2210/3211 , G10K2210/502 , G10K2210/511
摘要： A vibration/noise control system controls vibrations and noises generated with a periodicity or a quasi-periodicity from a vibration/noise source having a rotating member. A W filter formed by an adaptive digital filter generates a control signal for controlling the vibrations and noises. A self-expanding engine mount is arranged in a vibration/noise transmission path and converts the control signal into a driving signal for driving the vibration/noise source. A vibration/noise error sensor detects an error signal indicative of a difference between the driving signal and the vibrations and noises. A C filter stores a transfer characteristic of a portion of the vibration/noise transmission path extending between the W filter and the error sensor, and generates a reference signal based on the transfer characteristic. An LMS processing block updates the W filter coefficient, i.e. the control signal such that the error signal is made minimum, based on the error signal, reference signal and W filter coefficient. An H system-identifying filter identifies a dynamic characteristic of a physical system extending between the W filter and a predetermined control area, and a C system-identifying filter identifies a dynamic characteristic of the above portion of the vibration/noise transmission path. The C filter coefficient is updated based on results of identification by the C system-identifying filter. The H system- and C system-identifying filters each include an adaptive digital filter, of which the filter coefficient is updated by the use of a genetic algorithm.
摘要翻译：振动/噪声控制系统控制来自具有旋转构件的振动/噪声源的周期性或准周期性产生的振动和噪声。由自适应数字滤波器形成的W滤波器产生用于控制振动和噪声的控制信号。自扩张式发动机支架设置在振动/噪声传递路径中，并将控制信号转换成用于驱动振动/噪声源的驱动信号。振动/噪声误差传感器检测表示驱动信号与振动和噪声之间的差异的误差信号。 C滤波器存储在W滤波器和误差传感器之间延伸的振动/噪声传播路径的一部分的传递特性，并且基于传送特性生成参考信号。基于误差信号，参考信号和W滤波器系数，LMS处理块更新W滤波器系数，即控制信号，使得误差信号最小。 H系统识别滤波器识别在W滤波器和预定控制区域之间延伸的物理系统的动态特性，并且C系统识别滤波器识别振动/噪声传输路径的上述部分的动态特性。基于C系统识别滤波器的识别结果来更新C滤波器系数。 H系统和C系统识别滤波器各自包括自适应数字滤波器，其中通过使用遗传算法来更新滤波器系数。

32. 发明公开

EP0784845A1 ACTIVE CONTROL OF AIRCRAFT ENGINE INLET NOISE USING COMPACT SOUND SOURCES AND DISTRIBUTED ERROR SENSORS 失效
标题翻译： ACTIVE飞机发动机进气口噪声控制在使用压缩音源和分布式误差传感器
公开(公告)号：EP0784845A1
公开(公告)日：1997-07-23
申请号：EP95936219.0
申请日：1995-10-06
申请人： THE CENTER FOR INNOVATIVE TECHNOLOGY
发明人： BURDISSO, Ricardo , FULLER, Chris, R. , O'BRIEN, Walter, F. , THOMAS, Russell, H. , DUNGAN, Mary, E.
IPC分类号： F01N1 , F02C7 , G10K11
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 LMS 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. A multi channel control system is used to control any spinning mode. The multi channel control system to control both fan tones and a high pressure compressor BPF tone simultaneously. In order to make active control of turbofan inlet noise a viable technology, a compact sound source is employed to generate the control field. This control field sound source consists of an array of identical thin, cylindrically curved panels with an inner radius of curvature corresponding to that of the engine inlet. These panels are flush mounted inside the inlet duct and sealed on all edges to prevent leakage around the panel and to minimize the aerodynamic losses created by the addition of the panels. Each panel is driven by one or more piezoelectric force transducers mounted on the surface of the panel. The response of the panel to excitation is maximized when it is driven at its resonance; therefore, the panel is designed such that its fundamental frequency is near the tone to be canceled, typically 2000-4000 Hz.

33. 发明授权

EP0507829B1 ACTIVE VIBRATION REDUCING SYSTEM 失效
标题翻译：有源系统减振
公开(公告)号：EP0507829B1
公开(公告)日：1996-10-30
申请号：EP91901848.1
申请日：1990-12-24
申请人： NOISE CANCELLATION TECHNOLOGIES, INC.
发明人： ROSS, Colin, Fraser
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.

34. 发明公开

EP0631685A4 ELECTRONIC CANCELLATION OF D.C. MOTOR NOISE. 失效
标题翻译： DC电机噪音的电子压制。
公开(公告)号：EP0631685A4
公开(公告)日：1996-01-17
申请号：EP92915176
申请日：1992-03-19
申请人： NOISE CANCELLATION TECH
发明人： SMITH DEXTER , SCHWARTZ JOSEPH , ZIEGLER ELDON W JR
IPC分类号： B60L9/02 , G10K11/16 , G10K11/178 , H02K5/24 , H02K11/00 , H02K23/66 , H02P7/298
CPC分类号： H02K5/24 , G10K11/178 , G10K2210/10 , G10K2210/121 , G10K2210/123 , G10K2210/3013 , G10K2210/3045 , G10K2210/3212 , G10K2210/501 , H02K11/048 , H02K11/20 , H02K23/66 , H02P7/298
摘要： An active attenuation system for a DC motor (11) which yields global vibration reduction of slot or other motor induced tonals at the plate on which the motor is mounted without modifying the construction of the motor. The system comprises one or more vibration sensors (13), a signal synchronized to the slot rate or other motor induced tonal rate, an electronic adaptive controller (12) and the means to inject the control signal into the motor field and/or armature current.

35. 发明公开

EP0681727A1 INDIRECTLY SENSED SIGNAL PROCESSING IN ACTIVE PERIODIC ACOUSTIC NOISE CANCELLATION 失效
标题翻译：间接采样信号处理ACTIVE定期GERAUSCHUNTERDRÜCKUNG。
公开(公告)号：EP0681727A1
公开(公告)日：1995-11-15
申请号：EP94932098.0
申请日：1994-10-27
申请人： CATERPILLAR INC.
发明人： KUO, Sen, M. , MINJIANG, Ji , CHRISTENSEN, M., Kathryn , HEROLD, Robert, A.
IPC分类号： G10K11
CPC分类号： G10K11/178 , G10K2210/121 , G10K2210/3028 , G10K2210/3032 , G10K2210/3045
摘要： The system employing and the processing of, an indirectly sensed signal representative of a periodic noise acoustic wave into an input signal for a noise cancelling system where the indirectly sensed signal is converted into a pulse signal per period that carries fundamental and harmonic frequency information of the periodic noise. A tachometer type RPM signal is processed in a counter circuit (15) controlled by a logic circuit (16) to produce a signal of one pulse per revolution with a controlled duration, the pulse amplitude is adjusted, the pulses are low pass filtered and any D.C. is blocked from the noise cancelling system input.

36. 发明公开

EP0665529A3 Vorrichtung zur Verminderung des Reifen/Fahrbahngeräusches 失效
标题翻译： Vorrichtung zur Verminderung des Reifen /Fahrbahngeräusches。
公开(公告)号：EP0665529A3
公开(公告)日：1995-11-15
申请号：EP95100935.6
申请日：1995-01-25
申请人： Continental Aktiengesellschaft
发明人： Dodt, Dr. Thomas , Gauterin, Frank , Schulze, Dr. Thomas , Roik, Geert , Huinink, Heinrich
IPC分类号： G10K11/16
CPC分类号： G10K11/172 , B60C19/002 , G10K2210/101 , G10K2210/121 , G10K2210/12821 , G10K2210/3212 , G10K2210/32272
摘要： Die vorliegende Erfindung betrifft eine Vorrichtung zur Verminderung bestimmter Geräuschanteile in dem von einem Kraftfahrzeug emittierten Reifen/Fahrbahngeräusch, wobei im Bereich von Abstrahleinrichtungen des Reifen/Fahrbahngeräusches als Resonator ausgebildete Schallabsorber angeordnet sind, die auf Geräuschanteile, deren Frequenzen sich proportional zur Raddrehzahl ändern, abstimmbar sind. Zwei von drei alternativen Varianten der Erfindung setzen ein ABS-Bremssystem voraus. Um die Schallleistung, die von Reifen bei bestimmten Frequenzen, die sich proportional zur Raddrehzahl ändern, zu mindern, und so das Reifen/Fahrbahngeräusch zu vermindern, wird erfindungsgemäß vorgeschlagen, daß die Resonatoren am Fahrzeug an der Innenwand des Radkastens angebracht sind und in ihrer Anzahl, ihren Einzelvolumina und/oder ihren Impedanzen unter Zwischenschaltung einer Steuer- und/oder Regelelektronik an den geschwindigkeitsabhängigen Bedarf angepaßt werden.
摘要翻译：该装置具有形成为谐振器的噪声吸收器（40），该谐振器布置在轮胎和道路噪声的辐射方向的区域中，其可调谐到噪声部分，其频率与车轮速度成比例地变化。谐振器安装在车轮内壁上的车辆上，并设有电子控制装置（42）。控制装置根据轮胎的总块数和可变轮速度以及谐振器的调节来影响噪声辐射特性。调节装置影响谐振器的调节，使得测得的噪声压力信号最小。

37. 发明公开

EP0674097A1 Active exhaust gas muffler 失效
标题翻译： AktiverAbgasschalldämpfer。
公开(公告)号：EP0674097A1
公开(公告)日：1995-09-27
申请号：EP95102257.3
申请日：1995-02-17
申请人： ELECTRONIC SOUND ATTENUATION S.p.A.
发明人： Renzullo, Andrea , Mazzucchelli, Riccardo
IPC分类号： F01N1/06 , G10K11/178
CPC分类号： F01N1/065 , G10K11/178 , G10K2210/121 , G10K2210/1282 , G10K2210/12822 , G10K2210/3214 , G10K2210/3227 , G10K2210/32271
摘要： An active muffler (1) wherein a metal casing (3) defines a parallelepiped inner cavity (8) divided into a first (8a) and second (8b) chamber by a rectangular panel (13) of material impervious to heat. The panel (13) presents a central through opening (19), the peripheral edge of which contacts the peripheral edge (30) of the cone of a loudspeaker (6) housed in the first chamber (8a) and supplied by an electronic active noise reducing system. The second chamber (8b) houses a passive muffler (35) supplied with the exhaust gas produced by a vehicle engine.
摘要翻译：一种主动式消音器（1），其中金属外壳（3）通过不透热的材料的矩形板（13）限定被分成第一（8a）和第二（8b）室的平行六面体内腔（8）。面板（13）具有中央通孔（19），其中的中心通孔（19）与外围边缘接触容纳在第一腔室（8a）中的扬声器（6）的锥体的周缘（30）并由电子有源噪声减少系统。第二室（8b）容纳被提供有由车辆发动机产生的废气的被动消声器（35）。

38. 发明公开

EP0594626A4 HIGH EFFICIENCY FAN WITH ADAPTIVE NOISE CANCELLATION 失效
标题翻译：具有自适应噪声消除的高效风扇
公开(公告)号：EP0594626A4
公开(公告)日：1995-08-23
申请号：EP92902773
申请日：1991-07-16
申请人： NOISE CANCELLATION TECH
发明人： ZIEGLER ELDON W , MCLOUGHLIN MICAHEL P , VERSCHUEREN LUC , EGHTESADI KHOSROW , ARNOLD MICHAEL , FRIESEN ROBERT
IPC分类号： F04D29/66 , G10K11/178 , G10K11/16
CPC分类号： F04D29/663 , G10K11/178 , G10K2210/101 , G10K2210/112 , G10K2210/121 , G10K2210/3045 , G10K2210/509
摘要： This invention relates to a new type of compact high efficiency fan utilizing microphones (74, 75), a loudspeaker (69, 70) and a totally adaptive noise cancellation controller (73) whereby the design of the fan eliminates broadband noise and the controller reduces the remaining tonal component thus producing a high efficient silent fan.

39. 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.

40. 发明授权

EP0361968B1 Noise cancellor 失效
标题翻译： Lärmunterdrücker。
公开(公告)号：EP0361968B1
公开(公告)日：1994-06-22
申请号：EP89310000.8
申请日：1989-09-29
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Nagayasu, Katsuyoshi c/o Intellectual Property Div
IPC分类号： G10K11/16
CPC分类号： G10K11/178 , G10K2210/106 , G10K2210/121 , G10K2210/30232 , G10K2210/3025 , G10K2210/3032 , G10K2210/3045 , G10K2210/3051 , G10K2210/3054 , G10K2210/503
摘要： A noise cancellor includes a first sensor (22) for detecting a noise generated form a driving device (10) and converting the noise to electric signals. A signal processor (25) receives the electric signals and forms control signals by multiplying the electric signals by a predetermined factor series. In response to the control signals, a speaker (30) produces sound which interferes with the noise so as to cancel the noise at an object point (13). A second sensor (26) detects sound at the object point and converts them to electric signals which are inputted to the signal processor. The signal processor switches the control mode, in accordance with a predetermined condition, to an adapting active control wherein the factor series is changed in response to the electric signal applied from the second sensor or an active control wherein the factor series is fixed.

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