【摘 要】
：
一以往谱分析技术的局限性实时谱分析仪测定频谱的分析速度比以往的一般分析仪要快数百倍,使用这种系统可以立即知道有关振动、噪声以及其它数据的频率分布;从频谱的变化分
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一以往谱分析技术的局限性实时谱分析仪测定频谱的分析速度比以往的一般分析仪要快数百倍,使用这种系统可以立即知道有关振动、噪声以及其它数据的频率分布;从频谱的变化分析结构的动态特性,或根据固有频率查明振源和噪声源的位置等等。以往的扫描滤波器型分析仪,是根据频率变换技术使中心频率偏移、由单一带通滤波器组成、一次只能分析一个频带域的分析仪,往往由外部给出滤波器的中心频率并使它和调谐频率一致,其原理如图1。这种分析仪,影响谱分析时间的重要参数是扫描滤波器的
Limitations of a conventional spectrum analysis technique The real-time spectrum analyzer measures the frequency spectrum hundreds of times faster than conventional analyzers. With this system, the frequency distribution of vibration, noise and other data can be immediately known. From the spectrum Variations Analyze the dynamic characteristics of the structure, or find the location of the vibration source and noise source based on the natural frequency. The past scan filter type analyzer, based on the frequency conversion technology to make the center frequency offset by a single band-pass filter, only one analysis of a band of analyzers, often by the external center of the filter frequency and Make it consistent with the tuning frequency, the principle shown in Figure 1. This analyzer, an important parameter affecting the spectral analysis time is the scan filter
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