基于三坐标测量机的大口径球面拟合测量方法.pdfVIP

7 8 * 杨恒亮 屠大维 赵其杰 : , , , , , : , , , Large Caliber Spherical Surface Fitting Method Based on MMC Yang Hengliang Tu Dawei Zhao Qijie Abstract: There is no an effec ive me hod for measuremen and assessmen of large caliber spherical surf ace in he realm of spherical surface inspec ion . This paper proposes ha MMC should be used o ob ain coordina e da a abou he measured spherical surf ace and fi ing calcula ion is carried ou o ob ain he geome rical parame er of he measured spherical surface by means of leas square algori hm. In he process of leas square fi ing, he idea of changing he objec ive func ion o urn he f i ing calcula ion in o solving generalized eigenvec or is presen ed w hich no only brings abou good f i ing effec , bu also objec ively reflec s he real pa rame er and simplif ies he calcula ing process . Use circulari y and cylindrici y error for ref erence o se up spherici y error o reflec he geome rical error of measured spherical surface. Keywords: large caliber spherical surface, MMC, leas square, geome rical error 1 , x y z ( ) , , , , , , , ( 2) , [ 1] [ 2] , ; , , , , ( MMC) 1 , , , 2 MMC 2 1 MMC 1 , * ( : Y 0102) ( : 1001090607) 2 ( ) : 2007 4 2007 4 1! 12 79 , L N ( ) (