By applying finite element method and optimal design theory this paper carried out an optimal design model of the machine tool shaft, chosen optimal methods and given a living example.

运用有限元法和优化设计理论，建立机床主轴结构设计的优化数学模型，选择优化方法，进行了实例计算。

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At high precise NC Machine tool, grating can be adopted as sensing element of position detection equipment.

在高精度的数控机床上，可以使用光栅作为位置检测装置的敏感元件。

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The key to establish a precise dynamic model with Finite Element Method is the simulation of the dynamic characteristics of the joint face in the machine tool.

而建立机床结构精确的动力学有限元模型的关键是对机床机构中结合面的动力学描述。

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