软件采用曲线拟合算法。
最后对系统中采用的PID控制和曲线拟合算法进行了描述，并对测试结果进行了分析。
Finally, PID control and curve fitting algorithm were discussed together with testing data analysis.
通过现场实验数据，并利用最小二乘曲线拟合算法建立被控对象各通道之间的二阶系统模型。
Second: via experimental data we get the second-order system model for each control object by using least square curve simulation.
重点说明了如何利用DXF文件中的参数进行椭圆(弧)曲线拟合，详细介绍了椭圆(弧)曲线拟合算法的实现。
The ellipse (arc) curves fitting by adopting parameters in DXF file are emphasized, and the implementation of ellipse (arc) curve fitting algorithm is introduced in detail.
作者在最小二乘法的基础上，提出分段直线拟合算法来代替多项式曲线拟合，从而达到简化数学模型的建立和减少计算量的目的。
The author proposes a sectional line fitting to re - place the polynomial curve fitting, which results in simplifying establishment of mathematical model and reducing the amount of calculation work.
作者在最小二乘法的基础上，提出分段直线拟合算法来代替多项式曲线拟合，从而达到简化数学模型的建立和减少计算量的目的。
The author proposes a sectional line fitting to re - place the polynomial curve fitting, which results in simplifying establishment of mathematical model and reducing the amount of calculation work.
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