Through collecting vibration signal and analyzing it in the frequency domain in the condition of changing parameter cutting, a single self power spectrum is hard to detect tool breakage effectively.
在变切削参数的加工工况下，通过对振动信号的采集和频域处理，发现采用单一的自功率谱方法难以有效检测出刀片破损。
Frequency is one of the most important performance parameter of military power system.
频率是军用电力系统最重要的供电质量指标之一。
The UPFC power frequency model with its main and supplementary control block diagrams and the formulation for FDC parameter optimization are presented.
建立了UPFC的频域模型，给出了主控制和辅助控制的框图，推导了模糊阻尼控制器参数优化的公式。
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