automatic frequency control system 自动稳频系统 ; 频率自动控制系统 ; 自动频调系统
Frequency control Technology, which can be used as automatic air exchanging and conditioning system in flower cultivation greenhouse, has high reliability and excellent control performance.
变频调速技术以其高可靠性及优良的控制性能，可以作为自动换气调温系统应用在花卉培育温室大棚中。
Methods of analyzing the dynamic performance of automatic control system can include time domain analysis, frequency domain analysis and stability.
自动控制系统的动态性能的分析方法包括时域分析法，频域分析法，及稳定性判据。
The phase- locked loop is one kind of control system which is able to achieve phase automatic lock, to compose frequency and to trace demodulation system.
锁相环路是一种能实现相位自动锁定的控制系统，主要用于频率合成及跟踪解调系统。
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