Author Affiliations
Abstract
1 Research Center of Laser Fusion, CAEP, Mianyang 621900, China
2 Laboratory of Precision Manufacturing Technology, CAEP, China
The designs of inertial confinement fusion (ICF) targets, which field on ShenGuang III, are becoming more complex and more stringent in terms of assembly precision. A key specification of these targets is the spatial angle alignment accuracy. To meet these needs, we present a new spatial angle assembly method, using target part’s 3D model-based dual orthogonal camera vision, which is better suited for the flexible automation of target assembly processes. The two-hands structure micromanipulate system and dual orthogonal structure visual feedback system were investigated by considering the kinematics, spatial angle measuring, and motion control in an integrated way. In this paper, we discuss the measurement accuracy of spatial angle assembly method, which compared the real-time image acquisition with the redrawing 2D projection. The result shows that the assembly method proposed is very effective and meets the requirements of angle assembly accuracy, which is less than $1^{\circ }$. Also, this work is expected to contribute greatly to the advancement of other target microassembly equipments.
ICF target fabrication spatial angle target assembly High Power Laser Science and Engineering
2017, 5(2): 020000e9
军械工程学院 军械技术研究所, 河北 石家庄 050003
由于被测对象相距较远, 高精度的公共测量基准难以建立, 因此大尺寸空间角测量的难度较大。为了解决大尺寸条件下空间角的现场测量问题, 提出一种基于惯性基准的大尺寸空间角测量方法。首先, 阐述了大尺寸空间角的测量原理并且设计了测量系统。然后, 对测量系统中基于二维振镜的光轴指向不确定度进行了研究, 重点分析了各类误差对光轴指向不确定度的影响。最后, 利用蒙特卡洛仿真对各项误差所引起的光轴指向不确定度进行评定, 为光轴跟踪装置的误差分配及其指向精度的现场评估等工作奠定了基础。
大尺寸空间角 惯性测量 不确定度评定 蒙特卡洛 large-scale spatial angle inertial measurement uncertainty evaluation Monte Carlo 红外与激光工程
2016, 45(11): 1118004
军械工程学院 军械技术研究所, 河北 石家庄 050000
针对大型装备装配过程中的大尺寸空间角测量问题, 提出一种基于惯性基准的大尺寸空间角测量方法并且设计了相应的测量系统。该测量系统利用自准直原理获取被测轴线方向, 通过内部陀螺仪和编码器测量被测轴线在惯性坐标系中的单位向量坐标, 然后根据每个被测轴线在公共基准内的单位向量坐标值实现空间角的计算。建立了大尺寸空间角测量的数学模型, 并对测量系统的测量不确定度进行分析和计算。最后搭建了测量系统的原理样机并利用原理样机在实验室进行了模拟测量实验。实验结果表明, 原理样机的实际测量误差为14”, 满足了测量精度的要求。该方法采用惯性空间作为公共测量基准, 有效地解决了测量大尺寸空间角时测量基准难以建立和传递的难题, 使得测量过程更加灵活、高效。
大尺寸测量 空间角测量 坐标测量 惯性基准 自准直 large-scale measurement spatial angle measurement coordinate measurement inertial reference autocollimation