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Construction and uncertainty evaluation of large-scale measurement system of laser trackers in aircraft assembly
Measurement ( IF 5.6 ) Pub Date : 2020-07-03 , DOI: 10.1016/j.measurement.2020.108144
Yuhang Gai , Jiwen Zhang , Jiuming Guo , Xunlei Shi , Dan Wu , Ken Chen

A high-accuracy, large-scale measurement system of laser trackers is essential for aircraft assembly. The registration from a measurement coordinate system (MCS) to an assembly coordinate system (ACS) depends on an enhanced reference system (ERS). The usual method to construct a measurement system is the best-fit of single station (BFSS) method, which is highly sensitive to ERS deviation. In this paper, a bundle adjustment of multiple stations (BAMS) method is proposed. First, all the measurement stations and ERS are built into an entire measurement coordinate system (EMCS) through bundle adjustment. Then, stable ERS points are used to register the EMCS to the ACS. An error model of the BAMS is built and the proposed BAMS is demonstrated to have smaller registration parameter errors. Furthermore, the uncertainty of measurement system is evaluated through simulations and experiments, showing that the BAMS constrains the uncertainty considerably better than the BFSS.



中文翻译:

飞机装配中激光跟踪器大型测量系统的构建与不确定性评估

激光跟踪器的高精度,大规模测量系统对于飞机组装至关重要。从测量坐标系(MCS)到装配坐标系(ACS)的配准取决于增强的参考系(ERS)。构建测量系统的常用方法是最佳单站(BFSS)方法,该方法对ERS偏差高度敏感。本文提出了一种多站捆绑调整的方法。首先,通过束调整将所有测量站和ERS内置到整个测量坐标系(EMCS)中。然后,使用稳定的ERS点将EMCS注册到ACS。建立了BAMS的误差模型,并证明了所提出的BAMS具有较小的注册参数误差。此外,

更新日期:2020-07-03
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