open-loop control的用法和樣例：
例句
- And the experimental tests had been carried out to verify the established model as well as the dynamic characteristics under opening loop control.
並通過實驗，對所建立的動力學模型及開環控制下平台的實際動態特性進行了驗證。 - Hysteresis control has disadvantage of unstable switching frequency.
滯環控制方法存在開關頻率變化不定的缺點。
