The invention relates to a high precision real-time
contour error estimation method, belongs to the precise high efficiency
numerical control processing technology field and particularly relates to the high precision real-time
contour error estimation method on the basis of an initial value regeneration Newton
iterative method in a
numerical control parameter curve interpolation
processing process. The method comprises steps that firstly, before each step of iterative calculation, according to present interpolation point parameters and actual
cutter location points, an iteration parameter initial value on a parameter curve for Newton iterative calculation perpendicular foot points is calculated on the basis of a first order Taylor
series expansion method; secondly, a Newton
iterative method is utilized, a
single step iteration parameter final value is calculated according to the iteration initial value; thirdly, for avoiding greatly increasing the
algorithm calculation time, iteration is ended through double constraints of an iteration termination condition and a largest iteration frequency condition, a perpendicular foot point parameter estimate is acquired, and a
contour error vector estimate is further calculated. Through the method, iteration
divergence can be effectively avoided, contour error
estimation precision is improved, and the method has great signification for guaranteeing contour control precision during parameter curve interpolation
processing.