例如，让我们考虑一下正弦波，也即正弦曲线这样一个描述平稳反复振荡的数学函数。
For instance, let's consider the sine wave, or sinusoid, a mathematical function that describes a smooth repetitive oscillation.
然后将速率限制环节置于人机闭环系统中，利用描述函数法对驾驶员诱发振荡（ PIO）机理进行了研究。
With the rate limiting element in man machine closed loop system, we analyse the PIO using the method of describing function.
振荡频率几乎不受分流劈距的影响，它只是振荡管长的函数。
The oscillation frequency only was the function of oscillating tube length, not influenced by the spliter.
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