空间直线度误差评定的LSABC算法研究  

Research on LSABC algorithm for evaluation of spatial straightness error

作　　者：胡仲勋[1] 杨旭静[1] 王伏林[1] 

机构地区：[1]湖南大学汽车车身先进设计制造国家重点实验室,湖南大学机械与汽车工程学院,湖南长沙410082

出　　处：《工程设计学报》2008年第3期187-190,212,共5页Chinese Journal of Engineering Design

基　　金：中国博士后科学基金资助项目(20060400872)

摘　　要：空间直线度误差是最复杂的形位误差之一,其评定算法一直处于探索之中.针对在坐标测量机CMM上测得的空间直线度误差测点集,为提高形位误差的评定精度,提出了基于测点集中心的最小二乘算法(LSABC算法),根据误差理论和最小二乘原理,开发了LSABC算法的数学模型.并利用UG/GRIP语言对该算法编制了计算机程序,进行了数字实验验证.数字实验结果表明,该算法比传统的最小二乘算法(LSM)和其他多种算法具有更高的正确度.Spatial straightness error is one of the most complex geometric errors, and its evaluating algorithms are under exploration. To elevate the evaluation precision of geometric error,aiming at the measured points set of spatial straightness error from coordinate measurement machine—CMM , the least squares algorithm based on center of the measured points set （LSABC algorithm） was proposed. According to error theory and the least square principle, mathematical model of LSABC algorithm was developed. The LSABC algorithm was programmed with UG/ GRIP language, and validated by numerical experiments. The results show that this algorithm has higher accuracy than that of the traditional least squares method （LSM） and other algorithms.

关 键 词：空间直线度误差 形位误差 测点集 LSABC算法 

分 类 号：TH161.12[机械工程—机械制造及自动化]