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首页> 外文期刊>Canadian Aeronautics and Space Journal >Force Limited Vibration Testing Applied to the Fourier Transform Spectrometer Instrument of SCISAT-1
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Force Limited Vibration Testing Applied to the Fourier Transform Spectrometer Instrument of SCISAT-1

机译：力有限振动测试在SCISAT-1傅里叶变换光谱仪中的应用

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The Fourier Transform Speclrometer (FTS) is the primary instrument onboard the SCISAT-1 satellite that was successfully launched in August 2003. Vibration testing of the FTS flight model was performed in July 2002. To prevent damage to the sensitive equipment of the FTS, vibration testing was performed using the Force Limited Vibration (FLV) approach. The purpose of this approach is to reduce the overtesting that occurs during conventional vibration testing of space hardware, because of the difference in boundary conditions between flight and test configurations. In addition to controlling the input acceleration, FLV testing measures and limits the reaction force between the test item and the shaker. This force limiting results in acceleration notching at predominant natural frequencies of the test item. The paper presents a brief summary of the overtesling problem associated with conventional vibration testing. A review of the semi-empirical approach of FLV for deriving the force limits follows. The FTS test item and the test set-up are then described. The test procedures, test levels, and force limits are discussed. This includes the presentation of the test results and relevant discussion. The use of FLV resulted in reduction of overtesting along two of the three excitation axes, with a significant reduction for one of these two axes. The paper also presents a comparison of accelerations at the base of the FTS between instrument-level and spacecraft-level testing (performed in August 2002). The comparison indicates that, despite the overtesting reduction obtained from the use of the FLV approach, the vibration level for the FTS testing by itself was significantly higher than the vibration level it was subjected to during the subsequent spacecraft vibration testing.
机译：傅里叶变换光谱仪（FTS）是SCISAT-1卫星上的主要仪器，该卫星于2003年8月成功发射。FTS飞行模型的振动测试于2002年7月进行。为防止损坏FTS的敏感设备，振动使用力有限振动（FLV）方法进行了测试。这种方法的目的是减少由于飞行和测试配置之间的边界条件的差异而在空间硬件的常规振动测试期间发生的过度测试。除了控制输入加速度之外，FLV测试还可以测量并限制测试项和振动器之间的反作用力。这种受力限制导致在测试项目的主要固有频率处产生加速缺口。本文简要概述了与常规振动测试有关的过高问题。接下来是FLV用于得出力极限的半经验方法的回顾。然后描述FTS测试项目和测试设置。讨论了测试程序，测试水平和受力极限。这包括测试结果的介绍和相关讨论。 FLV的使用减少了沿三个激励轴中的两个激励轴的过度测试，并显着减少了这两个轴之一。本文还介绍了在FTS基础上的仪器级和航天器级测试之间的加速度的比较（2002年8月执行）。比较结果表明，尽管通过使用FLV方法获得了过高的测试减少效果，但FTS测试的振动水平本身明显高于其在随后的航天器振动测试期间所经受的振动水平。

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