In order to make more effective control of universal power quality controllers (UPQC), an outer loop model for the voltage loop in a three-phase three-wire UPQC is proposed in the paper.
为了对通用电能质量控制器直流侧电压进行更为有效的控制，提出一种用于三相三线通用电能质量控制器(UPQC)直流侧电压控制的外环模型。
Many loop invariants can be expressed in the form of the fixed point of a predicate universal function while weakest precondition is least fixed point and explained in the view of category theory.
在此基础上引入不动点原理深入刻划循环不变式的含义，循环不变式可以表示为谓词泛函的最小不动点，并从范畴论的角度解释该过程。
With MCS-51 single-chip microcomputer as control unit and grating scales measuring displacement, a new type of quasi-close loop control system is built on universal lathe.
文章选用MCS -5 1单片机作为控制核心，直线光栅测量位移，在普通车床上建立了一种新型的准闭环控制系统。
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