On the basis of analyzing a typical closed-loop damping curve method, this paper proposes a perturbation method used to determine the parameters of a system when its behavior changes continuously.
在详细分析一种典型的闭环衰减曲线法的基础上，提出将摄动法用于系统特性发生变化时的参数确定中。
In this paper, a simple method of plotting logarithmic phase frequency response curve for open-loop systems is advanced.
文章给出了绘制开环系统对数相频特性曲线的简便方法。
The research of a practical DDC system is presented. It's achieved to trace the target curve by feedback loop system with fixed feedback value.
介绍了某辗环机数字控制系统的研制，提出了采用定值反馈闭环控制方法跟踪目标值曲线。
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