| Citation: | SUN Xinyue, TIAN Wei, HU Junshan, et al. A hole position correction method of interpolation Coons surface based on genetic algorithm[J]. Journal of Beijing University of Aeronautics and Astronautics, 2021, 47(9): 1814-1822. doi: 10.13700/j.bh.1001-5965.2020.0324(in Chinese)
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In the automatic drilling process of the robot, the position of drilling is usually obtained from the process digital model of the workpiece to be drilled, and the position deviation and deformation will occur during the installation process of the workpiece to be drilled. Hence, the hole position accuracy requirement cannot be met if drilling according to the point position obtained from the process digital model directly. This paper proposes an interpolation Coons surface hole position correction method based on genetic algorithm to ensure the hole position accuracy of automatic drilling. The bilinear Coons error surface model is established using the corner reference holes in the drilling area, the error compensation vector of the hole to be drilled is calculated by the model, and the theoretical drilling position is compensated using the error compensation vector. At the same time, the reference holes in the drilling area are used to construct a genetic algorithm model to calculate the optimal value of the tangent vector modulus length to solve the problem that the tangent vector modulus length of the bilinear Coons error surface cannot be determined. The effectiveness and accuracy of the algorithm are verified through experiments. The results show that the use of interpolation Coons surface hole position correction method based on genetic algorithm can effectively compensate the hole position error, and the average hole position error is only 0.195 6 mm after compensation. Compared with the traditional interpolation surface methods, the hole position error is reduced by 5%-10% using interpolation Coons surface hole position correction method based on genetic algorithm.
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