基于冗余基准孔的轻型移动制孔系统定位方法

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飞机自动化装配过程中,制孔系统能否精确定位将直接影响装配精度.一般通过人工预先制得基准孔,检测基准孔在制孔系统下的位置,与在产品中的位置比较得到空间转换关系以完成系统定位.为提高轻型移动制孔系统的定位精度,提出了一种基于冗余基准孔的轻型移动制孔系统定位方法,使用罗德里格矩阵重新构建空间转换关系,提出冗余基准孔的偏差过滤算法,判断冗余基准孔中是否存在影响空间转换精度的大偏差孔位,提高转换关系精度,改善制孔系统的定位精度.进行算例分析与实验验证,证明所提方法可以在冗余基准孔中准确筛选并去除大偏差孔位,将空间转换误差减至小于0.12 mm,由误差传递理论知制孔系统定位精度提高约20%.
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