推导了固定四角薄型平板扬声器在单点激励下的振动方程，分析了在受激情况下的简正频率，并由简正频率方程导出其受力方程。
The vibration equation for thin flat plane loudspeaker with single point drive and four corners fixed is deduced and its simple harmonic vibration frequency in this condition is analyzed.
研究表明这种传感器策略与辐射体表面上的外激励力性质（如激励力类型、频率以及位置等）无关。
It is shown that this sensor strategy is independent of the type, magnitude and position of the external excitation.
本文对筒式粘弹性阻尼器在不同环境温度、激励频率和应变幅值下的动力性能指标进行了试验研究。
The dynamic properties of the circular tube VE dampers are tested under different environment temperature, excitation frequencies and shear strain amplitudes.
同步稳压产生两倍激励频率纹波频率，因此更容易被低通滤波器去除。
Synchronous rectification produces a ripple frequency twice that of the excitation frequency and thus is easier to remove with a lowpass filter.
接收机的每个通道都由高频放大器、中频放大、中频采样、数字正交器组成，另外还有DDS信号产生和频率激励源用来形成雷达发射机所需的S波段脉冲调制激励信号。
Each of them is composed of high frequency amplifier, intermediate frequency amplifier and sampling, digital phase uprightness intersector, DDS and the S band signal inspirator for the transmitter.
接收机的每个通道都由高频放大器、中频放大、中频采样、数字正交器组成，另外还有DDS信号产生和频率激励源用来形成雷达发射机所需的S波段脉冲调制激励信号。
Each of them is composed of high frequency amplifier, intermediate frequency amplifier and sampling, digital phase uprightness intersector, DDS and the S band signal inspirator for the transmitter.
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