Data processing and error analysis 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 they are straight whether after processing or before on the direction of face projection. The radius compensation algorithm of probe is presented based on measured data. For the reason that rib curves are 2D curves and the curvature is relatively smaller in the direction of wainscot stringer, the methods of least-square error analysis and polynomial fitting are adopted to compensate the radius of probe on the osculating plane of each rib curve. Aiming at the inspection requirement of measured part, the algorithms of curve matching and error analysis are proposed. The experimental results show that the proposed method can meet the precision requirement of online inspection of airfoil-wainscot parts.