Blade Profile Profile Error Evaluation Based on Improved ICP Algorithm
LU Heng1,XU Xu-song1,WANG Shu-gang2,WANG hao1
1. College of Mechanical Engineering, Jiangsu University of Technology, Changzhou, Jiangsu 213001, China
2. Wuxi Metrology and Testing Institute, Wuxi, Jiangsu 214100, China
Abstract：To address the problem of poor registration precision of traditional iterative closest point (ICP) algorithm, an improved ICP algorithm was proposed.First, a new type line data registration method based on vector alignment was used, considering that the measured data of CMM show orderly array and one-to-one correspondence.Secondly, based on the traditional ICP algorithm, non-uniform rational B-spline (NURBS) curve fitting was carried out for the registration data, and then the adaptive particle swarm optimization (PSO) algorithm was used to further accurately register the measurement data.Finally, the evaluation method of blade profile error based on the minimum region was used to evaluate the accuracy.Experimental results show that, compared with the traditional ICP algorithm, the improved method can further converge on the original convergence value, and the contour error is reduced by 28.57%.This method can effectively improve the accuracy of the evaluation of blade profile error and provide a reliable basis for the evaluation of blade machining quality.
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2022, Vol. 43 
