43 KB473 KB47 KB199920252003Guid, NikolaKolmanič, Simon12 straništevilka:4letnik:49str. 230-241ISSN:0039-2480COBISSID:8164630URN:URN:NBN:SI:doc-O77LQAS0enslAssociation of Mechanical Engineers and Technicians of Slovenia et al.Zveza strojnih inženirjev in tehnikov Slovenije et al.Strojniški vestnikalgoritmidigitalizacijadigitizationodvoj ploskevploskverekonstrukcijaHitri algoritem za rekonstrukcijo in odvoj digitaliziranih ploskev| A fast algorithm for reconstructing and flattening digitised surfaces|The problem of surface flattening is an important one in pattern engineering. Surface flattening is needed for the design of thin-walled objects, such as airplanes wings, outer ship hulls, parts of car bodies, shoe uppers, and textile products. Although composite materials can be used for building modern ships, hulls, steel is still the most commonly used material for the ship-building industry. Therefore, the pattern engineering process still has an important role in ship designing. For most of the ship's hull the flattening is quite simple; the problem is the flattening of the stem and the stern, because the surfaces of these parts of the ship are very complex, and therefore an efficient surface-flattening algorithm is needed. In this article a new fast algorithm for surface reconstruction and surface flattening, based on a divide-and-conquer strategy, is presented. Developable stripes are used to approximate the surface, and in this way the surface can be flattened quickly and without any distortionOdvoj ploskev je bistvenega pomena za načrtovanje ravninskih vzorcev, potrebnih za izdelavo npr.: letalskih kril, ladijskih trupov, delov avtomobilske pločevine, zgornjih delov čevljev in oblačil. Čeprav lahko za gradnjo sodobnih ladijskih trupov uporabljamo tudi kompozitne materiale, pa ostaja jeklo v ladjedelništvu še vedno najpogosteje uporabljan material. Zaradi tega ima postopek načrtovanja ravninskih vzorcev še vedno pomembno vlogo pri konstrukciji ladij. Odvoj večjega dela ladijskega trupa je dokaj preprost, izjema sta le premec in krma, ki ju odlikuje zahtevna oblika, zaradi česar potrebujemo učinkovit algoritem za odvoj ploskev. V tem prispevku je predstavljen novi hitri algoritem za rekonstrukcijo in odvoj ploskev, ki temelji na strategiji "deli in vladaj". Za rekonstrukcijo ploskve se uporabljajo odvojni trakovi. Na ta način se lahko ploskev odvije v ravnino brez deformacijTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaUniverza v Ljubljani, Fakulteta za strojništvo