固体火箭发动机体空间缺陷精确定位方法  

Defect accurate positioning method of solid rocket motor in volume space

作　　者：朱敏[1] 于光辉[2] 卢洪义[2] 李朋[2] 

机构地区：[1]海军航空工程学院7系,山东烟台264001 [2]海军航空工程学院飞行器工程系,山东烟台264001

出　　处：《航空动力学报》2013年第10期2364-2369,共6页Journal of Aerospace Power

基　　金：国家自然科学基金(51005242)

摘　　要：在固体火箭发动机体数据三维重构的基础上,构建出符合脱黏、气泡和夹渣体数据特征的三维相似变换模板,经三维相似变换后,定位出各类缺陷的体数据场位置,选取缺陷几何中心为缺陷精确定位的标志点,给出了体空间中缺陷几何中心的计算方法.设计制作了预置典型缺陷的模拟固体火箭发动机,测量得到的缺陷几何中心和实际几何中心的距离与最大直径的比值都不大于10%,即测量得到的几何中心与实际几何中心很接近,因此对缺陷几何中心的定位是准确的.On the basis of 3D reconstruction of the solid rocket motor volume data, the threedimensional similarity transformation templates compliant with the volume data fea tures of debonding, bubbles and slag inclusion were built. The volume data fields of various defects were located by 3D similarity transformation. The defect geometric center was se lected as the mark point for defect accurate positioning, and the calculation method in vol ume space of the defect geometric center was given. The simulated solid rocket motor with preset typical defects was designed. Through the experiment, the ratio of the measured dis tance between the geometric center and the actual geometric center, to the maximum diame ter is less than 10%. That＇s to say, the measured geometric center and the actual geometric center are very close, and the positioning of the geometric center of defects is accurate.

关 键 词：固体火箭发动机 体空间 三维相似变换 缺陷定位 工业CT(computed tomography) 

分 类 号：V435[航空宇航科学与技术—航空宇航推进理论与工程]