| Citation: | ZHU Y，XIAO S H，CHEN Z T. A registration algorithm with datum constraints and allowance constraints[J]. Journal of Beijing University of Aeronautics and Astronautics，2023，49（3）：580-587 （in Chinese） doi: 10.13700/j.bh.1001-5965.2021.0314
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This paper presents a registration algorithm based on datum constraints and allowance constraints, which allows the surface to be machined with a uniform allowance and to maintain accurate position relations. First, a local coordinate system was introduced to compute the registration results. Then a conversion method would be employed to solve the corresponding results in the global coordinate system. The introduction of the local coordinate system reduced the degree of freedom of the point set during registration, thus decreasing the number of dimensions and improving the computational efficiency while the algorithm was solved. The results can satisfy both the datum constraints and the allowance constraints. The algorithm was applied on a simplified model of a typical aircraft part “flap track”. The computational results showed that the computing time used by this method was only 33.6 percent of that used by the registration method with the allowance constraints alone, the maximal error for measure points was less than 0.04 mm, and the fluctuating of the allowance was less than 0.03 mm. Therefore, the method is suitable for finishing the surface of similar aircraft parts adaptively.
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