Passive virtual skyhook vibration isolation system
    2.
    发明授权
    Passive virtual skyhook vibration isolation system 失效
    被动虚拟天桥隔振系统

    公开(公告)号:US06315094B1

    公开(公告)日:2001-11-13

    申请号:US09574801

    申请日:2000-05-19

    IPC分类号: F16F710

    CPC分类号: F16F7/10

    摘要: A virtual sky hook vibration isolation system provides reduction of transmissibility at resonance without significantly increasing high frequency transmissibility. Isolation is achieved passively and without the need for an inertial reference frame. Design of the primary and secondary suspension systems is performed concurrently to achieve the desired performance. The primary suspension affords the necessary static deflection properties and high frequency isolation. The secondary system couples to the system at resonance and provides damping to the dynamic response. This combination yields the isolation benefits of the skyhook damper concept. The penalty for this performance is the necessity of a secondary spring-mass-damper device. However, results indicated that good performance can be achieved using a relatively small secondary mass (5% of the primary mass).

    摘要翻译: 虚拟天钩吊钩振动隔离系统提供了谐振时的传输率的降低而不会显着增加高频率的传输性。 隔离被动地实现,而不需要惯性参考系。 同时执行主悬挂系统和辅助悬架系统的设计以实现期望的性能。 初级悬浮液提供必要的静态偏转特性和高频隔离。 次级系统在共振时耦合到系统,并为动态响应提供阻尼。 这种组合产生了天钩阻尼器概念的隔离效果。 这种性能的惩罚是二次弹簧 - 质量阻尼器装置的必要性。 然而,结果表明,使用相对较小的二次质量(主要质量的5%)可以实现良好的性能。

    Evacuated enclosure mounted acoustic actuator and passive attenuator
    3.
    发明授权
    Evacuated enclosure mounted acoustic actuator and passive attenuator 失效
    抽真空的外壳安装的声学致动器和被动衰减器

    公开(公告)号:US06739425B1

    公开(公告)日:2004-05-25

    申请号:US10116892

    申请日:2002-04-05

    IPC分类号: G10K1300

    摘要: This invention presents a novel means to passively achieve a compact moving-coil actuator with a very low natural frequency. The diaphragm and voice coil are mounted in a sealed enclosure from which the air is partially or completely evacuated. This reduces the air spring effect. The diaphragm is supported by a non-linear, buckling, or collapsible support apparatus. By taking advantage of the non-linear stiffness properties of such structures, the stiffness of the actuator can be designed to be small at the operating point, which when combined with the moving mass, yields a low natural frequency.

    摘要翻译: 本发明提出了一种用于被动地实现具有非常低的固有频率的紧凑型移动线圈致动器的新颖手段。 隔膜和音圈安装在密封的外壳中,空气部分或完全抽空。 这降低了空气弹簧的作用。 隔膜由非线性,弯曲或可折叠的支撑装置支撑。 通过利用这种结构的非线性刚度特性,致动器的刚度可以在工作点被设计得很小,当与移动质量组合时,其刚度产生低的固有频率。