CAJ | 학술논문

对关节臂式坐标测量机中圆光栅角度传感器分度盘安装存在的偏心误差进行修正,可以有效提高测量机的测量精度.为了实现坐标测量机动态、实时的现场标校,建立了一种六自由度关节臂式坐标测量机的坐标系统,分析了圆光栅分度盘的安装偏心对角度测量的影响,推导了由于偏心引起的测量误差及其修正公式.分析表明,较小的安装偏心便会引起较大的角度测量偏差.以测量机的单点重复测量精度为目标函数,提出了一种基于模拟退火算法的角度传感器偏心参数辨识方法,并将其用于测量机关节圆光栅12个偏心参数的辨识和修正,实验结果表明,修正之后测量机的重复测量精度提高了11.3%.
대관절비식좌표측량궤중원광책각도전감기분도반안장존재적편심오차진행수정,가이유효제고측량궤적측량정도.위료실현좌표측량궤동태、실시적현장표교,건립료일충륙자유도관절비식좌표측량궤적좌표계통,분석료원광책분도반적안장편심대각도측량적영향,추도료유우편심인기적측량오차급기수정공식.분석표명,교소적안장편심편회인기교대적각도측량편차.이측량궤적단점중복측량정도위목표함수,제출료일충기우모의퇴화산법적각도전감기편심삼수변식방법,병장기용우측량궤관절원광책12개편심삼수적변식화수정,실험결과표명,수정지후측량궤적중복측량정도제고료11.3%.
The installation accuracy of angle sensors is an important factor relating to the measuring precision of an Articulated Arm Coordinate Measuring Machine (AACMM).In order to realize the dynamic calibration in real time for an AACMM, a coordinate system of the AACMM was established and a compensation expression for angle measuring errors was obtained from analyzing the effect of the off-center installed errors of circular gratings on the angle measurement. Theoretical analysis shows that a little eccentricity could cause a major error, so the angle data of circular gratings should be corrected in practical applications. A method using single-point repeatability as the objective function to identify the eccentricity parameters of the AACMM was introduced based on a simulated annealing algorithm and then it was applied to the identification and correction for the twelve eccentricity parameters of the AACMM. The result demonstrates that the repeatability of the AACMM has improved by 11.3%.