It is convenient to use frequency domain methods to deal with flight test data.
在飞机飞行试验的数据处理过程中，采用频域方法是比较方便的。
Both types have their own advantages: frequency domain methods have strong robustness, while spatial domain methods have higher accuracy.
这两种方法各有特点：频率域法的鲁棒性强，而空间域方法相对精确度更高。
Via frequency domain methods, the problem of stabilization by output feedback based on observer for linear system with multiple delays was discussed.
针对线性多时滞系统，利用频域法研究了线性多时滞系统基于观测器的输出反馈镇定控制问题。
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