固体火箭发动机体空间缺陷最大直径矢量特征测量方法

针对固体火箭发动机工业CT(computed tomography)三维扫描数据,从计算时间和测量精度两方面考虑,结合固体火箭发动机内部缺陷体空间数据场的特征,通过改进传统的空间最大距离求解法——擂台法,提出了基于分类种子点法的体空间缺陷最大直径矢量特征测量方法.设计了预置缺陷的固体火箭发动机,经实验验证,相比传统擂台法,该方法能够提高测量精度和缩短计算时间,最大直径及其与轴向锐角夹角的最大测量误差在10%以下,为固体火箭发动机三维可视化故障诊断奠定了基础.

Measurement method of defect maximum diameter vector feature of solid rocket motor in volume space

Based on the three-dimensional scanning data of solid rocket motor by industrial computed tomography, and considering the computation time and measurement accuracy, the traditional space maximum distance measuring method, named as challenge method, was improved by combining the defect features of the solid rocket motor volume space data field. The defect maximum diameter vector feature measurement method in volume space based on classified seed point method was proposed. The solid rocket motor with presetted defects was designed. Experiments show that the proposed method can improve the measurement accuracy and shorten the computation time compared with traditional challenge method, and the maximum errors of maximum diameter and axial acute angle are less than 10%, which is the foundation for solid rocket motors three-dimensional visualization fault diagnosis.