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.

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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.

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为此研究了一种用繁殖码本作为激励源的有效搜索方法，同时讨论了决定最小均方误差激励码字的全搜索过程。

So an efficient search method by using populating code book are developed, and search procedures for determining the minimum mean-square error excitation code word are discussed.

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