公开(公告)号：US20070245828A1

公开(公告)日：2007-10-25

申请号：US11640169

申请日：2006-12-18

申请人： Takamasa Nakajima ,  Kazuki Tsuda ,  Zenji Sakai ,  Kazuyoshi Ueno ,  Masakazu Shirahoshi ,  Koji Kawata ,  Yoshikado Yamauchi

发明人： Takamasa Nakajima ,  Kazuki Tsuda ,  Zenji Sakai ,  Kazuyoshi Ueno ,  Masakazu Shirahoshi ,  Koji Kawata ,  Yoshikado Yamauchi

IPC分类号： G01H11/00

CPC分类号： G01M7/02 ,  G01M7/022

摘要： Disclosed is a vibration test method for evaluating the vibration resistance of a specimen, comprising a test specification setting step (S10) of determining reference vibration conditions for the specimen based on transport conditions during actual transportation; a reference value attainment step (S20) of calculating an amplitude level and a reference accumulated fatigue value of the specimen under the reference vibration conditions; a test condition determination step (S30) of determining test vibration conditions and a test time based on an allowable amplification factor of the amplitude level and a desired vibration time, so that an accumulated fatigue value which is calculated from the vibration detection value of the specimen satisfies the reference accumulated fatigue value; and a vibration-imparting step (S40) of vibrating the specimen based on the test vibration conditions and the test time. In accordance with the vibration test method, a vibration test that conforms to the actual transportation environment can be readily performed with high accuracy.

摘要翻译： 公开了一种用于评价试样的抗振性的振动试验方法，其特征在于，包括根据实际运送中的运送条件来确定试样的基准振动条件的试验规格设定步骤（S10） 在参考振动条件下计算样本的振幅水平和基准累积疲劳值的基准值达到步骤（S20） 根据振幅水平的允许放大系数和期望的振动时间来确定测试振动条件和测试时间的测试条件确定步骤（S30），从而根据振幅检测值计算的累积疲劳值 试样满足参考累积疲劳值; 以及基于测试振动条件和测试时间使样本振动的振动赋予步骤（S40）。 根据振动试验方法，可以容易地以高精度进行符合实际运输环境的振动试验。

公开(公告)号：US06377900B1

公开(公告)日：2002-04-23

申请号：US09304669

申请日：1999-05-04

申请人： Kazuyoshi Ueno ,  Yoshikado Yamauchi

发明人： Kazuyoshi Ueno ,  Yoshikado Yamauchi

IPC分类号： G01M1900

CPC分类号： G01M7/06 ,  G01M7/022 ,  G01M7/025

摘要： A measuring system for measuring a transfer function matrix of a system to be controlled by applying sine-wave excitations to a test object simultaneously by multiple number of vibrators. In the measuring system, when sine-wave signals for driving multiple number of vibrators are generated, phases between the sine-wave signals are shifted randomly, first, and then multiple number of vibrators are excited simultaneously under the generated sine-wave signals. Then, an auto-spectrum and a cross-spectrum for one calculation are calculated from spectral data on a vibration frequency obtained from an analysis of excitation signals and response signals acquired during the excitations. These steps are repeated two or more times to calculate the auto-spectra and cross-spectra for two or more calculations, followed by arithmetically averaging these spectrums to find a mean value of the auto-spectra and a mean value of the cross-spectra, so that the transfer function matrix at a specific frequency is calculated from the both mean values. The steps up to this point are repeated at each frequency to calculate said transfer function matrix data at all frequency components. This can allow the same sine-wave signals and the same vibration condition as in a multi-degree of freedom sine-wave vibration test to be used in the test, for measuring the transfer function matrix of the system to be controlled with adequate accuracy.

摘要翻译： 一种测量系统，用于通过多个振动器同时对测试对象施加正弦波激励来测量要控制的系统的传递函数矩阵。 在测量系统中，当产生用于驱动多个振动器的正弦波信号时，正弦波信号之间的相位随机移动，首先在产生的正弦波信号下同时激励多个振子。 然后，根据从激励信号和激发期间获得的响应信号的分析获得的振动频率的频谱数据计算一次计算的自动频谱和交叉频谱。 这些步骤重复两次或更多次以计算两次或更多次计算的自动光谱和交叉光谱，随后算术平均这些光谱以找到自光谱的平均值和交叉光谱的平均值， 使得从两个平均值计算特定频率的传递函数矩阵。 在每个频率处重复到此为止的步骤，以计算所有频率分量的所述传递函数矩阵数据。 这可以允许在测试中使用与多自由度正弦波振动测试中相同的正弦波信号和相同的振动条件，用于以足够的精度测量要控制的系统的传递函数矩阵。