文献类型：期刊文献

英文题名：Descending Packing Algorithm for Irregular Graphics Based on Geometric Feature Points

作者：Zheng, Pengfei[1,2];Lou, Jingjing[2];Lin, Dajun[1];An, Qi[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[2]Yiwu Ind & Commercial Coll, Sch Mech Informat, Yiwu 322000, Peoples R China

年份：2020

卷号：2020

外文期刊名：MATHEMATICAL PROBLEMS IN ENGINEERING

收录：;EI(收录号：20204809528729);WOS:【SCI-EXPANDED(收录号:WOS:000594635900010)】；

语种：英文

外文关键词：Geometry - Computational complexity

摘要：The packing for two-dimensional irregular graphics is one of the NP-complete problems and widely used in industrial applications. In this paper, a descending nesting algorithm for a two-dimensional irregular graph based on geometric feature points is proposed. Before the packing, the parts to be packed are sorted, matched, and spliced, and the matching of the rectangular pieces and the rectangular-like pieces is carried out according to the plate size. On this basis, the geometric feature points of the parts are used to construct the packing baseline, and the packing is accurately carried out according to the principles of the bottom left, the principle of the lowest center of gravity, and combination with virtual moving, rotating collision calculation. The computation of the moving collision distance between the graphics is replaced by the projecting computation of the geometric feature points of the graphic parts, so the computation amount can be reduced. Also, this method is used to test a number of benchmarks examples which are provided by ESICUP (EURO Special Interest Group on Cutting and Packing), which show that the proposed algorithm not only can improve packing but also has better stability and reliability.