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    Passive vibroacoustic attenuator for structural acoustic control
    4.
    发明授权
    Passive vibroacoustic attenuator for structural acoustic control 失效
    用于结构声学控制的被动振动声衰减器

    公开(公告)号：US06195442B1

    公开(公告)日：2001-02-27

    申请号：US09384901

    申请日：1999-08-27

    申请人： Steven F. Griffin ,  Steven A. Lane

    发明人： Steven F. Griffin ,  Steven A. Lane

    IPC分类号： H04R2500

    CPC分类号： H04R1/2811 ,  H04R7/125 ,  H04R7/127 ,  H04R7/16 ,  H04R9/025

    摘要： This invention presents a passive vibroacoustic device that serves the dual function of attenuating the vibration of a flexible structure, and providing acoustic dissipation to the volume or cavity enclosed by the structure. This reduces the transmission of sound from external sources into the enclosure, and reduces vibration of the structure. By design of the shunting resistor and the mass and suspension properties, the device can be optimized to achieve high levels of both structural vibration attenuation and acoustic attenuation. Incorporating a feedback loop or adaptation mechanism will permit the device to maintain optimum attenuation in the case of time varying systems.

    摘要翻译： 本发明提供了一种无源的声波器件，其具有衰减柔性结构振动的双重功能，并为由结构包围的体积或空腔提供声学耗散。 这减少了声音从外部信号源传输到外壳中，并减少了结构的振动。 通过设计分流电阻器和质量和悬架特性，该器件可以优化，以实现高水平的结构振动衰减和声衰减。 结合反馈回路或适应机制将允许设备在时变系统的情况下保持最佳衰减。

    Lightweight acoustic damping treatment
    5.
    发明授权
    Lightweight acoustic damping treatment 有权
    轻量级声阻尼处理

    公开(公告)号：US07819221B1

    公开(公告)日：2010-10-26

    申请号：US11239440

    申请日：2005-09-27

    申请人： Steven A. Lane ,  Robert E. Richard ,  Steven F. Griffin

    发明人： Steven A. Lane ,  Robert E. Richard ,  Steven F. Griffin

    IPC分类号： F01N1/06 ,  F01N1/22 ,  E04B1/82 ,  B64C1/40 ,  F01N1/00 ,  E04B1/74

    CPC分类号： G10K11/172 ,  B64G1/22 ,  B64G1/38 ,  B64G1/46 ,  B64G2001/224 ,  F01N1/06 ,  F01N1/22

    摘要： A flexible membrane is attached to an internal wall of the fairing of a flight vehicle. The membrane is inflated with gas to achieve a shape that couples with and thereby attenuates the first acoustic resonance occurring within the volume enclosed by the fairing. A sensor senses the varying ambient atmospheric pressure during flight. A pressure regulating system includes an inflation valve and pressure relief valve. Based on the sensed ambient atmospheric pressure, this system adjusts the membrane's gauge pressure throughout the flight trajectory to maintain the desired coupling gauge pressure. Acoustic blankets can also be attached to the internal walls of the fairing to abate resonances having frequencies greater than 500 Hz. Inflating the membrane with helium enhances the attenuation otherwise obtained. Multiple membranes can be individually tuned to respectively attenuate multiple acoustic resonances.

    摘要翻译： 柔性膜连接到飞行器整流罩的内壁。 膜用气体充气以实现与由整流罩包围的体积内发生的第一声共振耦合并从而​​衰减的形状。 传感器感测飞行过程中变化的环境大气压力。 压力调节系统包括充气阀和泄压阀。 基于感测到的环境大气压力，该系统在整个飞行轨迹上调整膜的表压，以保持所需的耦合表压。 声学毯也可以连接到整流罩的内壁，以消除频率大于500Hz的谐振。 用氦气充气膜可增强否则获得的衰减。 可以单独调谐多个膜以分别衰减多个声共振。

    Adaptive vibro-acoustic attentuator for launch vehicles
    6.
    发明授权
    Adaptive vibro-acoustic attentuator for launch vehicles 失效
    用于运载火箭的自适应振动声学注意器

    公开(公告)号：US06775383B1

    公开(公告)日：2004-08-10

    申请号：US09681196

    申请日：2001-02-16

    申请人： Steven A. Lane ,  Steven F. Griffin

    发明人： Steven A. Lane ,  Steven F. Griffin

    IPC分类号： A61F1106

    CPC分类号： F16F15/03 ,  B64G1/641

    摘要： A lightweight self-contained vibro-acoustic device is disclosed for dissipating low frequency vibration and acoustic energy within the payload fairing of launch vehicles. The device can be mounted on the interior surfaces of a fairing and adaptively tuned to match targeted structural and acoustic dynamics using electronic feedback loops.

    摘要翻译： 公开了一种轻量级的独立的振动声学装置，用于消除运载火箭的有效载荷整流罩内的低频振动和声能。 该装置可以安装在整流罩的内表面上，并使用电子反馈回路进行自适应调整，以匹配目标结构和声学动力学。

    Vibration damping system
    7.
    发明授权
    Vibration damping system 失效
    振动阻尼系统

    公开(公告)号：US5378974A

    公开(公告)日：1995-01-03

    申请号：US88965

    申请日：1993-07-02

    申请人： Steven F. Griffin

    发明人： Steven F. Griffin

    IPC分类号： F16F15/00 ,  G05D19/02 ,  B64C17/06

    CPC分类号： F16F15/005 ,  G05D19/02

    摘要： The smart patch includes two piezoceramic actuators which operate on both sides of a structural member at the same fixed distance from the neutral axis to produce a bending method. The piezoceramic actuators are configured such that when subjected to a voltage, one shrinks and one expands. This provides the moment. One piezoceramic could also be used to provide half the moment provided that it was the same distance from the neutral axis of the structural member. There is a piezoceramic sensor that senses the vibrational mode to be suppressed. Finally there are control electronics that consist of a charge amplifier, a two pole low pass filter and a bridge amplifier. All of these elements are integrated into one entity.

    摘要翻译： 智能贴片包括两个压电陶瓷致动器，它们以与中性轴相同固定距离的方式在结构构件的两侧进行操作，以产生弯曲方法。 压电陶瓷致动器构造成使得当经受电压时，一个收缩并且一个膨胀。 这提供了时刻。 一个压电陶瓷也可以用来提供一半的力矩，只要它与结构构件的中性轴线相同的距离即可。 有一个压电陶瓷传感器可以感测要抑制的振动模式。 最后有控制电路由电荷放大器，双极低通滤波器和桥式放大器组成。 所有这些元素都集成到一个实体中。

    Dynamic variable shape optical element
    8.
    发明授权
    Dynamic variable shape optical element 有权
    动态变形光学元件

    公开(公告)号：US07649691B2

    公开(公告)日：2010-01-19

    申请号：US12143262

    申请日：2008-06-20

    申请人： Steven F. Griffin ,  Arturo A. Jacobs ,  Karl N. Schrader

    发明人： Steven F. Griffin ,  Arturo A. Jacobs ,  Karl N. Schrader

    IPC分类号： G02B3/00

    CPC分类号： G02B26/0825

    摘要： Systems and methods according to one or more embodiments are disclosed to provide a dynamic variable shape optical element for wavefront correction. In an embodiment, a variable shape optical element assembly includes an optical element having a front surface and a back surface with specified curvature characteristics. The variable shape optical element assembly also includes back knife edges having a designated shape disposed on the back surface of the optical element and front knife edges having a designated shape disposed on the front surface of the optical element. The variable shape optical element assembly further includes a mechanical arrangement adapted to apply a dynamic mechanical force to create the specified curvature characteristics.

    摘要翻译： 公开了根据一个或多个实施例的系统和方法，以提供用于波前校正的动态可变形状光学元件。 在一个实施例中，可变形光学元件组件包括具有前表面和具有特定曲率特性的后表面的光学元件。 可变形光学元件组件还包括设置在光学元件的背面上的具有指定形状的后刀刃，并且具有设置在光学元件的前表面上的具有指定形状的前刀刃。 可变形光学元件组件还包括适于施加动态机械力以产生特定曲率特性的机械装置。

    System for enhancing the sound of an acoustic instrument
    9.
    发明授权
    System for enhancing the sound of an acoustic instrument 失效

    公开(公告)号：US06320113B1

    公开(公告)日：2001-11-20

    申请号：US08683705

    申请日：1996-07-18

    申请人： Steven F. Griffin ,  Chance C McColl ,  Sathya V. Hanagud

    发明人： Steven F. Griffin ,  Chance C McColl ,  Sathya V. Hanagud

    IPC分类号： G10H100

    CPC分类号： G10D3/00 ,  G10H1/125 ,  G10H3/146 ,  G10H3/26 ,  G10H2220/535 ,  G10H2220/541 ,  G10H2250/081 ,  G10H2250/235 ,  Y10S84/10

    摘要： A system is disclosed that provides sound control for an acoustic musical instrument. Typical to all acoustic instruments, the instruments have a structure or housing that defines a vented acoustic chamber. An input or sound inducing mechanism (such as strings of a guitar) imparts a vibration to the structure which causes acoustic waves to resonate within the acoustic chamber. The motion of air in and out of the vent causes acoustic waves to emanate from the chamber that combine with the acoustic waves emanating from the structure to form sound/musical notes. In accordance with the invention, a system controls the sound emanating from such an acoustic instrument. In accordance with one embodiment of the invention, at least one integral or smart sensor is disposed adjacent a sensing location of the structure, and the sensor is configured to generate sensed electric signals indicative of the magnitude of structural vibration of the structure at the sensing location. A controller in communication with the sensor, includes a processor for processing the sensed electric signals in accordance with a predetermined method (e.g., computer program). In response, the controller produces output electrical signals. At least one integral or smart actuator is disposed adjacent an actuator location of the structure, and the actuator is in communication with the controller and is configured to receive the output electrical signals and induce structural vibration of the structure at the actuator location. As a result of the foregoing structure and operation the induced vibration of the structure at the actuator location creates acoustics that alter the sound emanating from the acoustic chamber as well as that emanating from the structure. Specifically, signature frequency response characteristics of acoustic instruments like damping and frequency values of structural and acoustic resonances can be altered to alter the sound of the acoustic instruments. The use of integral or smart sensors and actuators put no restrictions on the movement of the acoustic instrument player since they are part of the guitar structure.

    Strain amplification structure and synthetic jet actuator
    10.
    发明授权
    Strain amplification structure and synthetic jet actuator 有权
    应变放大结构和合成射流致动器

    公开(公告)号：US08937424B2

    公开(公告)日：2015-01-20

    申请号：US13524878

    申请日：2012-06-15

    申请人： Steven F. Griffin ,  Shawn Haar

    发明人： Steven F. Griffin ,  Shawn Haar

    IPC分类号： H02N2/04

    CPC分类号： H01L41/09 ,  B64C21/04 ,  B64C21/08 ,  B64C2230/04 ,  B64C2230/06 ,  B64C2230/18 ,  H01L41/053 ,  H01L41/25 ,  H02N2/043 ,  Y02T50/166 ,  Y10T29/42

    摘要： A strain amplification structure has a frame with a hexagonal structure incorporating a plurality of rigid beams that are connected to opposing end beams by a plurality of flexible joints. A piezoceramic actuator assembly is connected to the opposing end beams having a collar including an opening. A shaft providing an output is connected to the plurality of rigid beams with flexible joints and passes through the opening in the collar for non-interfering motion orthogonal to the actuator assembly.

    摘要翻译： 应变放大结构具有六边形结构的框架，其结合有多个刚性梁，其通过多个柔性接头连接到相对的端部梁。 压电陶瓷致动器组件连接到具有包括开口的套环的相对端梁。 提供输出的轴连接到具有柔性接头的多个刚性梁，并且穿过轴环中的开口，用于与致动器组件正交的非干涉运动。