By using test signal method, the sub-synchronous electrical damping characteristics of a generator and the impacts of the designed SEDC on the generators electrical damping are analyzed.

采用测试信号法，通过计算发电机组的次同步电气阻尼特性，分析所设计的SEDC对发电机组次同步振荡的抑制效果。

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Wed o field test experiment on surface grinding machine of series M7180 (70), and analyze the spectrums characteristics of the testing signal.

对m 7180(70)系列平面磨床进行了现场实验测试，并对测试信号进行幅频特征分析。

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Realistic device characteristics can be analyzed under actual operating conditions by varying the test frequency, test signal level, and dc bias.

切合实际器件特性可以分析根据实际营运情况，由不同检测频率，测试信号水平和直流偏置。

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