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中文摘要：
分别利用直线、圆曲线与多项式曲线的拟合空间曲线实体,估计出拟合曲线与真实曲线之间的模型误差,建立包含模型误差与法线方向位置误差的曲线综合误差带模型。并通过算例证明了含有模型误差的综合误差带模型能更好地反应圆曲线的位置不确定性。
英文摘要：
This paper presented an integrated error model consisting of the general normal direction positional error and the model error.The model error proposed in this paper was based on the variance between the true curve and the fit curves（fitted by line,circular curve and polynomial curve respectively）.Experiments on implementation of this integrated error model demonstrated better description on positional uncertainty.
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