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。
By the experiment based on the designed digital system, a demodulation curve resembling theoretic simulation is obtained, and the feasibility of this scheme of digital close-loop is proved.
通过实验的基础上设计的数字系统中，类似的解调曲线理论模拟，数字闭环这个计划的可行性证明。
By the experiment based on the designed digital system, a demodulation curve resembling theoretic simulation is obtained, and the feasibility of this scheme of digital close-loop is proved.
通过实验的基础上设计的数字系统中，类似的解调曲线理论模拟，数字闭环这个计划的可行性证明。
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