公开(公告)号：US5884736A

公开(公告)日：1999-03-23

申请号：US825614

申请日：1997-03-31

申请人： Ricardo A. Burdisso ,  John D. Heilmann

发明人： Ricardo A. Burdisso ,  John D. Heilmann

IPC分类号： F16F7/10

CPC分类号： F16F7/1011

摘要： An active vibration absorber including a frame connected to a structure to be controlled and at least two reaction mass elements operatively connected to the frame. Each of the reaction mass elements is independently movable with respect to said frame. The absorber includes a force generating member for controlling relative movement between the reaction mass elements for damping vibration of the structure. The inventive dual reactive mass absorber requires less control force to produce the same vibration attenuation as conventional single reactive mass absorbers.

摘要翻译： 一种主动减震器，包括连接到待控制的结构的框架和至少两个可操作地连接到框架的反作用质量元件。 每个反应质量元件可相对于所述框架独立地移动。 吸收器包括用于控制用于阻尼结构的振动的反作用质量元件之间的相对运动的力产生构件。 本发明的双反电池吸收器需要较少的控制力以产生与常规单个反作用质量吸收器相同的振动衰减。

公开(公告)号：US5662136A

公开(公告)日：1997-09-02

申请号：US498489

申请日：1995-09-11

申请人： Tadeusz M. Drzewiecki ,  John B. Niemczuk ,  Christopher R. Fuller ,  Russell H. Thomas ,  Ricardo A. Burdisso

发明人： Tadeusz M. Drzewiecki ,  John B. Niemczuk ,  Christopher R. Fuller ,  Russell H. Thomas ,  Ricardo A. Burdisso

IPC分类号： G10K11/08 ,  G10K11/178 ,  F15C1/04 ,  F15C1/12

CPC分类号： G10K11/08 ,  G10K11/1788 ,  G10K2210/121 ,  G10K2210/1281 ,  G10K2210/32121 ,  Y10T137/0396 ,  Y10T137/2196

摘要： Reduction or cancellation of acoustic noise is achieved by providing an amplified, oppositely phased version of the noise by means of an acousto-fluidic amplifier. The amplified acoustic output noise is delivered through an impedance matching horn in destructively interfering relation with the original noise. Depending on the acoustic noise source and its spatial distribution, the acousto-fluidic amplifier may be a single stage amplifier or multiple stages connected in parallel and/or cascade, with output horns spatially distributed to have the maximum cancellation effect. Sensed noise, prior to fluidic amplification, may be processed in a manner to effect feedback or feedforward control of the amplified acoustic output signals.

摘要翻译： 通过声流放大器提供噪声放大的相反阶段版本来实现声学噪声的减少或消除。 放大的声输出噪声通过阻抗匹配喇叭与原始噪声具有破坏性干扰关系。 取决于声学噪声源及其空间分布，声流放大器可以是单级放大器或并联和/或级联连接的多级放大器，输出喇叭在空间上分布以具有最大的消除效果。 在流体放大之前的感测噪声可以以对所放大的声输出信号进行反馈或前馈控制的方式进行处理。

公开(公告)号：US07047725B2

公开(公告)日：2006-05-23

申请号：US10446896

申请日：2003-05-28

申请人： Jeffrey W. Moe ,  Stuart J. Byrne ,  Norman J. James ,  Ricardo A. Burdisso

发明人： Jeffrey W. Moe ,  Stuart J. Byrne ,  Norman J. James ,  Ricardo A. Burdisso

IPC分类号： B64F1/26

CPC分类号： F02C7/045 ,  F05D2250/191 ,  F05D2250/283 ,  F05D2260/96 ,  G10K11/175

摘要： An assembly useful in reducing aircraft engine noise such as turbofan engine noise comprises: (a) a core portion comprising at least one entrance end and at least one exit end for the passage of acoustic energy therethrough; (b) a first member having an exterior face and an interior face, wherein the first member is adjacent to at least a part of the core portion, and the first member has a plurality of openings therein to permit the passage of acoustic energy therethrough; and (c) a second member having an exterior face and an interior face, wherein the interior face of the second member is adjacent to the core portion. The core portion may be a honeycomb acoustic structure, and the first member may be perforated to permit the passage of acoustic energy into and out of the conduit portion.

摘要翻译： 用于减少飞机发动机噪声（诸如涡扇发动机噪声）的组件包括：（a）芯部，包括至少一个入口端和至少一个出口端，用于使声能通过其中; （b）具有外表面和内表面的第一构件，其中所述第一构件与所述芯部的至少一部分相邻，并且所述第一构件在其中具有多个开口以允许声能通过其中; 和（c）具有外表面和内表面的第二构件，其中第二构件的内表面与芯部分相邻。 核心部分可以是蜂窝声学结构，并且第一构件可以被穿孔以允许声能进入和离开导管部分。

公开(公告)号：US6112514A

公开(公告)日：2000-09-05

申请号：US159634

申请日：1998-09-24

申请人： Ricardo A. Burdisso ,  Jerome P. Smith

发明人： Ricardo A. Burdisso ,  Jerome P. Smith

IPC分类号： F02C7/045 ,  F04D29/66 ,  G10K11/175 ,  F02K3/02

CPC分类号： B64D33/02 ,  F02C7/045 ,  F04D29/663 ,  G10K11/175 ,  B64D2033/0206 ,  B64D2033/0286 ,  F05D2260/96 ,  F05D2260/962 ,  Y02T50/671

摘要： An array of adaptive or fixed Herschel-Quincke tubes aligned in a circumferential or helical array about an inlet of a turbofan engine. The array of tubes effectively divide the acoustic energy generated by the engine. One of the energy components propagates within the tubes while the other propagates within the engine compartment. At some time certain, the acoustic energy in the tubes is reintroduced into the engine compartment to cancel the acoustic energy remaining in the engine as it propagates from the fan towards the inlet and outlet openings.

摘要翻译： 一组自适应或固定的赫歇尔 - 奎因（Herschel-Quincke）管围绕涡轮风扇发动机的入口以圆周或螺旋阵列排列。 管阵列有效地分割发动机产生的声能。 其中一个能量部件在管内传播，而另一个在发动机舱内传播。 在某些时候确定的是，管中的声能被重新引入发动机舱，以消除当发动机从风扇向入口和出口开口传播时剩余的声能。