Two error data fitting schemes,interpolation and least square fitting are explored: the least-square fitting scheme, which is simple in equation and bettr result in compensation, is strongly suggested Then an so-call...Two error data fitting schemes,interpolation and least square fitting are explored: the least-square fitting scheme, which is simple in equation and bettr result in compensation, is strongly suggested Then an so-called “Punishing compensation” scheme is exploited, By means of proportioning,subtacting and recursive compensation, the solid modeling errors may be grealy cut down. Appropriate scheme should be selected according to solid modeling precision requirement.展开更多
The principle of planc-to-plane perpendicularity measuring with coordinate measuring machine （CMM） is described and the main factors that influence the measuring precision are analyzed. The minimum condition method ...The principle of planc-to-plane perpendicularity measuring with coordinate measuring machine （CMM） is described and the main factors that influence the measuring precision are analyzed. The minimum condition method is adopted to eliminate the fitting error of the datum plane. In order to diminish the length error of the object plane, the tactics of measuring some part of the plane and then scale to the whole plane is employed. With large quantity of measuring experiments on fiat plates, the most appropriate number of points in measuring a plane is determined to reduce the sampling error.展开更多
文摘Two error data fitting schemes,interpolation and least square fitting are explored: the least-square fitting scheme, which is simple in equation and bettr result in compensation, is strongly suggested Then an so-called “Punishing compensation” scheme is exploited, By means of proportioning,subtacting and recursive compensation, the solid modeling errors may be grealy cut down. Appropriate scheme should be selected according to solid modeling precision requirement.
基金sponsored by the Special Research Fund for Young Teachers of Universities in Shanghai under Grant No.gjd-07048
文摘The principle of planc-to-plane perpendicularity measuring with coordinate measuring machine （CMM） is described and the main factors that influence the measuring precision are analyzed. The minimum condition method is adopted to eliminate the fitting error of the datum plane. In order to diminish the length error of the object plane, the tactics of measuring some part of the plane and then scale to the whole plane is employed. With large quantity of measuring experiments on fiat plates, the most appropriate number of points in measuring a plane is determined to reduce the sampling error.
