本文利用描述函数法，重点分析了条件反馈校正对自持振荡的抑制作用。
Using the describing function method, this paper gives emphasis to analyse the conditional feedback correction effect on restrain self-sustaining oscillation.
本文研究了低流速范围内突出式和陷落式圆柱形腔的流激自持振荡和驻波共振问题。
The flow-induced self-sustaining oscillation and standing wave resonance of protruding and trap cavities are studied at the low speed range.
实验发现，在一定的气流速度和空腔几何尺寸下，空腔内流动会出现强烈的自持振荡。
In the experiment it is found that at a certain external flow velocity and cavity size a strongly self sustained flow oscillation in the cavity would appear.
实验发现，在一定的气流速度和空腔几何尺寸下，空腔内流动会出现强烈的自持振荡。
In the experiment it is found that at a certain external flow velocity and cavity size a strongly self sustained flow oscillation in the cavity would appear.
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