frequency loop的用法和樣例：
例句
- Hysteresis control has disadvantage of unstable switching frequency.
滯環(huán)控制方法存在開(kāi)關(guān)頻率變化不定的缺點(diǎn)。 - In this paper,by deriving the limit loop frequency of the system,the speed limitation is determined,and the calculating formulas are given.
本文采用求鎖相環(huán)非線(xiàn)性系統極限環(huán)頻率的方法確定了系統的速率極限，并給出了計算公式。
