摘要
为了探讨并联坐标测量机的机构原始误差和测量过程误差引起测量结果的偏差,在并联六坐标测量机的位置分析基础上,依据矩阵全微分理论,提出了机构原始误差与测头的位置和姿态误差模型,研究了机构参数误差变化对测头的位置和姿态误差的影响,明确了减小测头误差的主要途径是提高测量机零部件的机械加工和装配精确度,严格控制角度误差.给出了在机构参数存在误差的情况下,采用误差直接补偿法修正测头位置和姿态的方法.仿真验证表明,采用软件误差直接补偿法,可以明显提高测量准确度.
From the six-freedom-degree parallel mechanism coordinate measuring machine (CMM) position analysis, and using the matrix complete differential-coefficient theory, the relationship between original machine error and probe position-stance error is established. The influence caused by machine parameter errors changing for the position-stance error of probe is studied. The probe error can be reduced by improving the manufacture precision and assembly precision of CMM components, and controlling its angle error. A direct-error-compensation method is proposed to correct the position-stance of probe. The direct-error-compensation of software can improve the measuring precision.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2004年第3期317-320,共4页
Journal of Harbin Institute of Technology
基金
黑龙江省政府资助博士后研究项目.
