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117 条记录 (耗时 0.012 秒)

    SYSTEM AND METHOD FOR SIMULTANEOUSLY CONTROLLING SPECTRUM AND KURTOSIS OF A RANDOM VIBRATION
    32.
    发明公开
    SYSTEM AND METHOD FOR SIMULTANEOUSLY CONTROLLING SPECTRUM AND KURTOSIS OF A RANDOM VIBRATION 有权
    系统和方法对频谱和峰度非周期性振动的同时控制

    公开(公告)号：EP1766358A1

    公开(公告)日：2007-03-28

    申请号：EP05803744.1

    申请日：2005-07-05

    申请人： Vibration Research Corporation

    发明人： VAN BAREN, Philip, D.

    IPC分类号： G01M7/02

    CPC分类号： G01M7/06 ,  G01M7/022

    摘要： A system and method for producing and controlling a random signal with simultaneous control of both the power spectral density (PSD) and kurtosis (100) where a controlled signal is measured from a transducer, and converted to a PSD (111) using a Fast Fourier Transform (FFT). The measured PSD is compared (117) with a reference PSD (121) where an adaptive filter (119) is updated to compensate for the error. Simultaneously the kurtosis of the measured data is computed (125) and compared to a reference kurtosis (123). A feedback control loop (127) is employed to adjust the kurtosis of a white noise random generator with variable kurtosis (101). This white noise is then filtered by the adaptive filter (119) to provide the output signal used to drive the control process.

    MULTI-LEVEL VIBRATION TEST SYSTEM HAVING CONTROLLABLE VIBRATION ATTRIBUTES
    33.
    发明公开
    MULTI-LEVEL VIBRATION TEST SYSTEM HAVING CONTROLLABLE VIBRATION ATTRIBUTES 审中-公开
    具有可调振动特征多级振动测试系统

    公开(公告)号：EP1073890A1

    公开(公告)日：2001-02-07

    申请号：EP99918669.5

    申请日：1999-04-19

    申请人： HOBBS, Gregg K.

    发明人： HOBBS, Gregg K.

    IPC分类号： G01M7/06

    CPC分类号： G01M7/06

    摘要： The multi-level vibration test system has controllable vibration attributes that enable the test engineer to precisely implement avibration environment that is applicable to a wide range of applications and performance characteristics. The multi-level vibration test system comprises a plurality of shaker modules that are interconnected by coupling modules and optionally includes vibration input elements and/or vibration shaping elements that collectively function to enable the user to program the frequency and magnitudes that are produced by the multi-level vibration system. This architecture as well as the numerous implementation variations that are possible using this architecture, enable the test engineer to precisely control the vibration frequencies and magnitudes that are produced.

    PRELOADED TABLE COUPLING
    34.
    发明授权
    PRELOADED TABLE COUPLING 失效
    预先表联接

    公开(公告)号：EP0169899B1

    公开(公告)日：1989-06-28

    申请号：EP85901160.3

    申请日：1985-01-30

    申请人： MTS SYSTEMS CORPORATION

    发明人： BUSHEY, John, A.

    IPC分类号： B06B1/00 ,  G01M7/00

    CPC分类号： B06B1/18 ,  G01M7/06 ,  Y10S92/01

    摘要： Table couplings for coupling hydraulic actuators (20) to large shaking (22) tables (10), such as earthquake simulator tables are preloaded under gaseous psressure to permit the couplings to be nontension carrying couplings, which in turn permits use of hydrostatic slip bearings (47) between the side surfaces and the bottom surface of the table and the actuators. The hydrostatic bearings (47) in turn reduce the need for swivels, links and yokes that carry both tension and compression. The use of compression only loading such as that permitted with the present device, also reduces the problem of making a satisfactory table foundation, because only compression loads are carried to the foundation rather than alternating tension-compression loads.

    PRELOADED TABLE COUPLING
    36.
    发明公开
    PRELOADED TABLE COUPLING 失效
    预装表离合器。

    公开(公告)号：EP0169899A1

    公开(公告)日：1986-02-05

    申请号：EP85901160.0

    申请日：1985-01-30

    申请人： MTS SYSTEMS CORPORATION

    发明人： BUSHEY, John, A.

    IPC分类号： G01M7 ,  B06B1

    CPC分类号： B06B1/18 ,  G01M7/06 ,  Y10S92/01

    摘要： Des couplages de table pour coupler des vérins hydrauliques (20) à des tables (10) à grandes secousses (22), par exemple des tables de simulation de tremblements de terre, sont préchargés sous pression gazeuse pour leur permettre d'être des couplages porteurs sans tension, qui à leur tour permettent l'utilisation de coussinets glissants hydrostatiques (47) entre les surfaces latérales et la surface de fond de la table et les vérins. Les coussinets hydrostatiques (47) réduisent eux le besoin de bras articulés, d'articulations et d'étriers qui portent à la fois la tension et la compression. L'utilisation d'une charge de compression seulement, semblable à celle que permet le présent dispositif, fait également disparaître le problème de la fabrication d'une fondation de table satisfaisante, puisque seules les charges de compression sont portées par la fondation et non les charges alternantes de tension et de compression.

    Apparatus for two axis screening vibration.
    37.
    发明公开
    Apparatus for two axis screening vibration. 失效
    Zweiachsenrüttelgeräte。

    公开(公告)号：EP0104170A4

    公开(公告)日：1985-07-30

    申请号：EP82901387

    申请日：1982-03-23

    申请人： KIMBALL DAVID V

    发明人： KIMBALL DAVID V

    IPC分类号： G01M7/00 ,  B06B3/00 ,  B23Q1/36 ,  B23Q1/60 ,  G01M7/06

    CPC分类号： G01M7/06 ,  B06B3/00 ,  B23Q1/36 ,  B23Q1/60

    摘要： Two-axis shaker vibration of a slip plate (12) is achieved by use of angularly disposed shakers (18, 20) of novel design, each being provided with an armature (66) cantilevered from the slip plate (12) and free to laterally translate at the same time they drive the slip plate (12). Pivoting movements are converted to linear motion by a torsionally stiff flexure support (90) for the slip plate (12). The field of the invention relates to vibration testing of products.

    摘要翻译： 滑动板（12）的双轴摇动振动通过采用新颖设计的角度设置的振动器（18,20）实现，每个振动器设置有从滑动板（12）悬臂式悬挂的电枢（66），并自由地横向 平移它们同时驱动滑板（12）。 枢转运动通过用于滑板（12）的扭转刚性挠曲支撑件（90）转换成线性运动。 本发明的领域涉及产品的振动测试。