The invention discloses a circular arc front-and-back edge of an
aviation blade
reconstruction method based on error control, and is used for solving the technical problem that anti-
noise performance of the existing blade section characteristic parameters extraction method based on the measured data is poor. The circular arc front-and-back edge of the
aviation blade
reconstruction method based on the error control is composed of selecting region points covering the front-and-back edge of the
aviation blade, arranging the region points, and matching the arranged region points with a cubic spline so as to
gain a curve L0. The method carries out discretion and
encryption on the matched spline curve L0 in an arc equal-length mode, respectively marks the head discrete point as P0i and the end discrete point as P1i, utilizes the least square method to carry out a circular matching for the
discrete points between P0i and P1i containing P0i and P1i, calculating the average error epsilon i from the
discrete points to an ith matching circle, and setting the iteration
control error as epsilon until the epsilon i is less than or equal to the epsilon, the iteration ends. Based on the error control based on the matching of the least square method for fitting, utilizing the iterative matching method based on the error control, the circular arc front-and-back edge of the aviation blade
reconstruction method reconstructs blade circular arc front-and-back edge, avoids that the points in the selected area involve the matching, wherein the points are not on the circular arc, and improves the anti-
noise performance.