其次是数控机床全误差模型的建立，误差参数辨识和软件补偿的实现。
Secondly, total error models for an NC machine tool, were developed, the error parameters were identified and the software error compensation was accomplished.
本文在对工业螺旋运动理论分析的基础上，建立了螺旋运动的数学模型，并对其误差进行了分析，提出了螺旋运动“全误差”的概念。
Based on the analysis of industry helical motion, spiral motion model is established, and a "total error" concept is proposed for its error analysis.
全波傅氏算法是基于周期信号推导出来的，当采样信号中含有衰减直流分量时，将会产生误差。
The decaying DC component in the sampling signal will bring errors to the full-wave Fourier algorithm, which is derived with periodic signal.
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