G2连续的截面数据重构

针对特征间G2连续约束条件难于满足，导致截面重构质量不理想的问题，提出了一种有效的G2连续截面数据重 构方法。文章重点研究圆弧特征与自由特征间边界约束为G2连续的截面数据重构。优先重构圆弧特征，然后基于边界Gl连续约束模型重构自由特征；插入最优节点，微调控制点满足严格C2连续约束条件。实例表明该方法能够保证截面 重构质量，缩短截面重构周期。从而解决包含圆弧与B样条曲线的截面特征重构问题。 关键词：逆向工程；截面数据重构；G2连续；特征；约束

Reconstruction of G2 Continuous Cross Sectional Data

Due to G2 continuity between the features difficult to meet in reverse engineering, resulting in sectional reconstruction poor accuracy, an effective method of adding G2 continuity was proposed. This paper focuses on the sectional data reconstruction of arc features and free features in G2 continuous. Priority to accurately reconstruct the arc. then based on Gl continuous reconstruct free feature; insert the optimal node and slightly adjust control points to meet the G2 continuous strictly. Examples show that this method can guarantee the quality section reconstruction, greatly shorten the period of reconstruction. so as to solve the problem of the reconstruction of the cross section of the circular arc and B spline curve.