平面复杂曲线轮廓度误差评定和判别

总结了平面曲线轮廓度误差的测量方法和评定准则,提出了平面曲线轮廓度误差最小区域几何判定准则。给出了平面曲线轮廓度误差评定的数学模型及其计算方法,通过对测量曲线特征点的平移、旋转及最大误差方向移动完成粗配准,进而用坐标轮换法按最小条件原则实现平面曲线的精匹配以消除测量时的定位误差。最后通过实例证明几何准则的正确性和计算方法的可行性。

Evaluation and Identification of the Profile Errors of Complicated Plane Curve

The method for measuring curve profile error and principle of profile error evaluation are summarized. The geometry rule of the least condition principle for evaluating profile error of the plane curve is proposed. An efficient model and algorithm are presented for planar free-form curve profile error evaluation.The self adaptive coordination is realized between the theoretical curve and the measured subject by the process of pre-positioning rough match of the feature points and fine match. At last an example has validated the correctness of the geometry rule and feasibility of this algorithm.