采用谐波分析的直线度误差信号提取  

Application of Harmonic Analysis to Extraction of Straightness Error

作　　者：黄丽玲[1] 李兴旺[1] 王宇[1] 王焕玲[1] 黄富贵[1] 

机构地区：[1]华侨大学机电及自动化学院,福建厦门361021

出　　处：《华侨大学学报（自然科学版）》2014年第1期7-10,共4页Journal of Huaqiao University(Natural Science)

基　　金：福建省自然科学基金资助项目(2012J01216)

摘　　要：通过三坐标测量机上对零件平面内直线度误差的5组实验,将谐波分析的方法应用于直线度误差提取.研究结果表明:在得到的谐波分析图上无法找到直线度误差信号的最高次谐波波长成分,相关标准中建议采用的奈奎斯特采样定理无法直接用于确定直线度误差的提取点数.但是可以对直线度误差进行误差分离处理,对分离出的确定性误差采用上述谐波分析的方法,从而再依据奈奎斯特定理确定出提取点数.Five groups of experiments on the straightness error in part plane were conducted by CMM. Harmonic analysis was applied to extraction of straightness error. The result shows that, the highest harmonic wavelength of the straightness error signal can not be found from harmonic diagrams. Nyquist sampling theorem which is mentioned in relevant standards can not be applied directly to determine extraction points of straightness error. However, the signal of straightness error can be separated. Extraction points of the separated deterministic error are determined by the above mentioned harmonic analysis method and Nyquist theorem.

关 键 词：直线度 形位误差 谐波分析 提取 奈奎斯特定理 

分 类 号：TG83[金属学及工艺—公差测量技术] P207[天文地球—测绘科学与技术]