The adopted control mode of previous common frequency converter is usually of open loop constant voltage ratio, which its control curve is not stable.
早期通用变频器大多为开环恒压比的控制方式，控制曲线不稳定。
The unloading curve normally falls below the loading curve to form a hysteresis loop .
卸载曲线通常都落在加载曲线之下，形成一个滞后回线。
This algorithm is fast, can be used widely, and can pick up Minimum Closed Loop from any complicated curve set.
该算法速度较快、应用范围广，能适用于任意复杂曲线集提取最小闭环的情况。
This paper proposes the concept of Minimum Closed Loop of free curve set, and presents two properties of Minimum Closed Loop.
文章提出了自由曲线集最小闭环的概念，给出了最小闭环的两个性质。
The design of code loop is the key point in the ranging system. And the choice of its parameter greatly affect the trace curve.
码跟踪环的设计是伪码测距系统的一个关键环节，其参数的选择对环路跟踪曲线影响很大。
For avoiding the math models of three-phase AC electromotor and frequency inverter, adopt the simple similarity of ascending curve method to ensure the math models of every loop.
为避开三相交流异步电动机和变频器的数学模型，利用飞升曲线法简单近似确定各环节的数学模型。
In a digital weir, open loop digital control is applied, and the method is simple and reliable. And it can give accurate flow according to the given process curve.
数字量水堰是开环控制方式，方法简便可靠，可以按给定的过程曲线精确可靠地施放流量。
Built up the sport mathematics equation of the elbow pole organization based on the loop method, and drew its displacement, velocity and acceleration exercise curve.
基于回路法建立了模切机双肘杆施压机构的运动数学方程，并绘出了双肘杆机构部分构件位移、速度、加速度的运动曲线。
Moreover, this paper puts forward an adaptive method of control valve based on open-loop and enhances measure accuracy through curve fitting method.
同时，本文提出一种基于开环的阀门开度自适应控制方法，通过在线曲线拟合的方法提高阀门控制的精度。
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。
The pressure gain curve is used for accurate modeling of the valve but has little effect on closed loop control.
压力增益曲线被用于阀门的精确建模，但对闭环控制的影响很小。
The load and displacement loop is plump, and the descent part of framework curve is smooth in the structure.
此类结构滞回曲线的滞回环饱满，骨架曲线下降段比较平缓；
As the target of flatness control, flatness target curve is an important component of the closed loop feedback flatness control system.
作为板形控制的目标，板形目标曲线是闭环反馈式板形控制系统的重要组成部分。
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。
MnZn ferrite was prepared by hydrothermal method, and its property was described by XRD, hysteresis loop and temperature rise curve.
采用水热合成方法制得了晶相单一的锰锌铁氧体，对样品进行了XRD、磁滞回线和温升曲线的测定。
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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