摘要
在频域法直线误差分离技术中 ,为了进行Fourier变换 ,通常都假设直线形状误差满足周期性条件 .然而由于直线形状误差的非周期性及端点的非连续性 ,会引起高阶谐波分量失真等边缘效应 .为此 ,提出了趋势线构造方法和对称延拓方法 ,通过创建新的周期性函数以解决频域法中直线形状误差的非周期现象 .对比实验 。
As a straightness error separation method,frequency domain method is usually used by assuming that the straightness error meets the periodic condition of Fourier transformation.However,the straightness error is aperiodic in fact,and the edges of measurement range are discontinuous,which will lead to the edge effects such as the distortion of the high-order harmonic components.To solve the influence of aperiodic straightness error,two new methods,i.e.constructing trend line method and symmetrical continuation method are presented in this paper.Moreover,the comparative experiments are carried out to prove the feasibility of the two methods.
出处
《同济大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2001年第12期1387-1390,共4页
Journal of Tongji University:Natural Science
基金
国家自然科学基金资助项目 ( 5 0 0 75 0 5 6 )
关键词
频域三点法
周期函数
趋势线
对称延拓
直线误差分离
周期性假设
机械加工
frequency domain three-point method
periodic function
trend line
symmetrical continuation
straightness error separation
