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1. 发明授权

US5873559A Adaptively tuned vibration absorber for reduction of aircraft cabin noise 失效
标题翻译：适用于减少飞机机舱噪音的减振器
公开(公告)号：US5873559A
公开(公告)日：1999-02-23
申请号：US839275
申请日：1997-04-17
申请人： Andreas H. von Flotow , Mathieu Mercadal , Kelvin B. Scribner , Timothy Mixon , Corydon Roeseler
发明人： Andreas H. von Flotow , Mathieu Mercadal , Kelvin B. Scribner , Timothy Mixon , Corydon Roeseler
IPC分类号： B64D27/26 , F16F7/10 , F16F15/02 , F16F15/04 , F16M7/00 , F16M13/00 , G01M7/00
CPC分类号： F16F15/02 , F16F7/1005
摘要： An aircraft engine is attached to the fuselage by a mounting structure that has a vibration absorbing system which includes first and second sensors to produce signals indicating vibration along two orthogonal axes. A third sensor, such as an accelerometer, is coupled to the mounting structure for sensing vibration of the engine. A tachometer circuit, connected to the third sensor, produces first and second speed signals that indicate the speeds of two rotating spools in the engine. Four vibration absorbers are attached to the engine mounting structure and controllers are provided to dynamically tune the resonant frequency of each vibration absorber in response to a unique combination of one of the two vibration signals and one of the two speed signals. Thus the vibration absorbers reduce the engine spool vibrations that are transmitted through the mounting structure along the two orthogonal axes. The resonant frequency of each absorber is altered to track variation of the vibrations due to changes in engine speed.
摘要翻译：飞机发动机通过具有振动吸收系统的安装结构附接到机身，该系统包括第一和第二传感器，以产生指示沿两个正交轴线的振动的信号。诸如加速度计的第三传感器联接到安装结构以感测发动机的振动。连接到第三传感器的转速计电路产生指示发动机中两个旋转线轴的速度的第一和第二速度信号。四个减振器连接到发动机安装结构，并且控制器被提供以响应于两个振动信号中的一个和两个速度信号之一的独特组合来动态地调节每个减振器的谐振频率。因此，减振器减小沿着两个正交轴线传递通过安装结构的发动机线轴振动。每个吸收器的谐振频率被改变以跟踪由于发动机转速变化引起的振动的变化。

2. 发明授权

US5810319A Adaptively tuned vibration absorber with dual flexures 失效
标题翻译：具有双曲线的自适应调谐减振器
公开(公告)号：US5810319A
公开(公告)日：1998-09-22
申请号：US839274
申请日：1997-04-17
申请人： Andreas H. von Flotow , Timothy Mixon , Luigi Maggi
发明人： Andreas H. von Flotow , Timothy Mixon , Luigi Maggi
IPC分类号： B64D27/26 , F16F1/02 , F16F1/18 , F16F7/10 , F16F15/02 , F16F15/04 , F16M7/00 , B64D27/00
CPC分类号： F16F7/1011 , F16F1/025 , F16F1/185
摘要： An apparatus for counteracting vibrations includes a housing for attachment to a vibrating member. First and second bodies are connected to the housing by first and second springs, respectively, with a combined stiffness which defines a resonant frequency at which the first and second bodies oscillate with respect to the housing. Each of the first and second springs include a plurality of rods fixedly connected between a pair of rings. A lever engages the first and second bodies to vary a spacing between those bodies when force from an actuator is applied to the lever. The lever action alters the stiffness of the first and second springs which varies the resonant frequency of the vibration absorber.
摘要翻译：用于抵消振动的装置包括用于附接到振动构件的壳体。第一和第二主体分别通过第一和第二弹簧连接到壳体，具有组合的刚度，其限定第一和第二主体相对于壳体摆动的共振频率。第一和第二弹簧中的每一个包括固定地连接在一对环之间的多个杆。当来自致动器的力被施加到杠杆时，杠杆接合第一和第二主体以改变这些主体之间的间隔。杠杆作用改变第一和第二弹簧的刚度，其改变振动吸收器的共振频率。

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