基于三维激光点云的固体火箭发动机喷管零部件尺寸测量方法研究  

Research on dimensional measurement method of SRM nozzle parts based on 3D laser point cloud

作　　者：马智睿 朱金薇 耿靖源 王玉平 乔娅婷 昝文媛 袁玉华 MA Zhirui;ZHU Jinwei;GENG Jingyuan;WANG Yuping;QIAO Yating;ZAN Wenyuan;YUAN Yuhua(Shaanxi Electric Appliance Research Institute,Xi'an 710025,China;Shaanxi Zhongtian Rocket Technology Co.Ltd.,Xi'an 710025,China)

机构地区：[1]陕西电器研究所,固体火箭发动机先进检测技术中心,西安710025 [2]陕西中天火箭技术股份有限公司,西安710025

出　　处：《固体火箭技术》2024年第2期278-284,共7页Journal of Solid Rocket Technology

摘　　要：为实现固体发动机喷管小型零部件尺寸高效、精确的非接触式测量,采用三维激光扫描技术测量喷管的上支耳尺寸,通过点云粗配准和精配准将其正反两面的点云数据精准拼接,在传统的ICP(Iterative Closest Point)迭代最近点的配准方式上结合Octree算法,优化了搜索过程并排除了异常匹配点对,最后将配准后的点云模型导入Geomagic ControlX中进行测量。结果表明,与三坐标测量值相比较,36只不同上支耳的三维激光扫描精度基本保持在±0.05 mm范围内;测量15次单件上支耳获取测量结果的平均时间4.98 s,重复性小于2%,测量精度和重复性的满足工艺规程和要求。In order to realize the efficient and accurate non-contact measurement of the size small parts of solid rocket motor nozzle,the 3D laser scanning technology was used to measure the size of upper lugs of nozzle,and the point cloud data on the front and back sides were accurately spliced through the point cloud coarse registration and fine registration,and the Octree algorithm was combined with the traditional iterative closest point registration method,which optimized the search process and excluded abnormal matching point pairs.Finally,the registered point cloud model was imported into Geomagic ControlX to reconstruct the 3D model for measurement.The results show that:Compared with the three-coordinate measurement method,the 3D laser scanning accuracy of 36 different upper lugs is basically maintained in the range of±0.05 mm;Fifteen single-piece upper lugs were measured with an average time of 4.98 s and a repeatability of less than 2%;both the measurement accuracy and repeatability meet the process specifications and requirements.

关 键 词：喷管 小型零部件 三维激光扫描 尺寸测量 点云数据 点云配准 

分 类 号：V435.3[航空宇航科学与技术—航空宇航推进理论与工程]