The resolving Procedures represented by resolving set-integrator circuit and equivalent speed loop regulating circuit of double close oop SCR-D system.

以给定积分器电路和双闭环晶闸管供电直流调速系统中等效速度环调节回路为例，说明求解过程。

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The stability of the system is analyzed by small-signal, the results shows that the double integrator close-loop is a Phase-Locked-Loop (PLL) essentially.

采用小信号的方法对其稳定性进行分析。分析结果表明这种结构本质上具有锁相环的功能。

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Then we consider an double-integrator discrete time system model.

本文研究了三种连续群体系统和一种离散系统。

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Then we consider an double-integrator discrete time system model.

本文研究了三种连续群体系统和一种离散系统。

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