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本文用准稳态法讨论含有相位加速度信号的捕捉,针对含有任意周期奇函数特性鉴相器的高增益二阶和三阶环进行讨论,得到了捕捉公式。还得到相位加速度及速度小于某数值时,二阶环的捕捉时间比三阶环的捕捉时间短的结论。
In this paper, the quasi-steady-state method is used to discuss the capture of signals with phase acceleration. The high-gain second-order and third-order loops with odd-phase characteristic phase discriminators are discussed. The capture formulas are obtained. The conclusion is also obtained that the second-order loop’s capture time is shorter than the third-order loop’s capture time when the phase acceleration and velocity are less than a certain value.