...词：位置精度；重复定位精度；定位精度；双频激光干涉仪 [gap=424]Keywords：Location accuracy；Repeatability of positioning；Position accuracy；Biffequency laser interferometer ..
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The traditional positioning accuracy detection method of feed shaft for numerical control(NC) machine tool exists low accuracy, method obsolete and poor measurement repeatability.
传统的数控机床进给轴定位精度的检测方法，存在精度低、方法落后、检验重复性差等缺点。
Vehicle tests show that the positioning accuracy of the prototype is about the same to the GPS, and is provided with a quite good repeatability.
车载实验表明，样机的定位精度和GPS相当，并具有较好的重复性。
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