基于位姿测量不确定度的飞机对接质量评估

针对基于位姿的数字化测量辅助飞机大部件对接技术的发展与应用,对位姿测量不确定度以及基于不确定度的质量评价方法进行了研究.给出了数字化对接环境下大部件位姿的数学表达形式及意义.提出了基于协方差矩阵的位姿测量不确定度解析算法,并通过仿真算例与蒙特卡洛仿真法进行了对比,验证了该算法的有效性.给出了飞机大部件对接过程数字化测量工艺能力指数的概念,用于对测量结果的可信性进行评价;通过构建位姿测量不确定度与对接质量评估指标间的映射关系,提出了一种基于位姿测量不确定度的大部件对接质量评估方法,并以机翼-机身对接过程为案例,对方法的可行性、算法的有效性进行了验证.

Quality evaluation method for aircraft large components joining based on position and orientation measurement uncertainty

In order to support the development and application of digital measurement assisted joining of large size aircraft components based on position and orientation, related work focus on measurement uncertainty of position and orientation, and quality evaluation methodology based on uncertainty was done. First of all, the mathematical expression and connotation of position and orientation in digital joining environment was proposed. Then an analytical algorithm based on covariance matrix for calculating the measurement uncertainty of position and orientation was proposed, and compared with the Monte Carlo simulation algorithm to verify its validity. The concept of digital measurement process capability index was given to evaluate the credibility of measurement result. Through implementing the mapping from measurement uncertainty of position and orientation to quality requirements, a novel methodology for evaluating the quality of large size components joining based on measurement uncertainty of position and orientation was proposed. Finally, the case of wing-fuselage digital joining was studied to present the verification of the feasibility and validity of the methodology.