Error analysis of rib curves based on measured data of airfoil-wainscot
The characteristics of accuracy control of large-scale airfoil-wainscot parts are analyzed. The accuracy of airfoil-wainscot is controlled by its rib curves, and the rib curves are straight lines whether after processing or before on the direction of face projection. The method of compensating the radius of measuring probe is presented also based on measuring data from 1D scanning probe. Aiming at the inspection requirement of the measured part and the characteristics of rib curves, the algorithms of curve matching and error analysis are proposed. The experimental results show that the proposed methods can meet the accuracy requirement of online inspection of airfoil-wainscot parts.
A algorithm for the measuring head's radius compensation
Based on analyses the methods of the measuring head's radius compensation,a new algorithm with enveloping "canker" for measuring head's radius compensation is proposed. The precision of the algorithm is analyses by a example.
Comparison of linear and normal deviations of forms of engineering surfaces
Abstract Form errors of engineering components are usually evaluated using linear deviations, although sometimes, normal deviations are also considered. This paper compares linear and normal deviations, using least squares and minimum deviation techniques.