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Title:Razvoj metodologije za razvrstitev zaznavnih ploskev pri oblikovanju izdelkov
Authors:Cupar, Andrej (Author)
Stjepanović, Zoran (Mentor) More about this mentor... New window
Files:.pdf DOK_Cupar_Andrej_2015.pdf (6,36 MB)
MD5: 8E6E40EDD819AEBE2619300469A85250
 
Language:Slovenian
Work type:Dissertation (m)
Typology:2.08 - Doctoral Dissertation
Organization:FS - Faculty of Mechanical Engineering
Abstract:Disertacija obravnava problematiko vrednotenja površja. To površje je lahko elementarna ploskev, ploskev, sestavljena iz elementarnih ploskev, 3D skenogram ali mrežni model. Uporabljamo izraz zaznavne ploskve, ki predstavljajo površje, ki ključno vpliva na zaznavanje izdelka z uporabniškega vidika. Pri tem nas ne zanima estetska vrednost teh ploskev, ampak metodologija, ki omogoča vrednotenje. Za ta namen smo predstavili metodologijo n×n, ki se izvaja hkrati v programskem okolju Rhinoceros (RH) in dodatku Grasshopper (GH). V GH je nastavljena procedura z uporabo standardnih gradnikov GH. Rezultat te analize je najprej n×n matrika, v kateri so zbrane n×n razdalje, ki so v nadaljevanju normirane in zbrane v normalizirani n×n matriki. Iz normirane n×n matrike izhajajo izračuni za lastnosti CASP. S temi štirimi lastnostmi lahko ovrednotimo vsako površje; označujejo pa ukrivljenost, pospešenost, simetrijo in proporcionalnost. Rezultati so primerljivi samo pri elementarnih ploskvah. Elementarna ploskev je ploskev, ki ima podobno ukrivljenost ali predstavlja oblikovno značilnost ali del oblikovne značilnosti. Pri kompleksnih ali sestavljenih ploskvah lahko rezultate primerjamo samo za določen tip objektov; na primer samo za obraze. Sicer kompleksne ploskve segmentiramo in razdelimo na elementarne. Prikazanih je tudi nekaj vmesnih razvojnih faz, v katerih smo uporabili drugačne analitične postopke, ki smo jih na koncu opustili. Vseeno lahko z njimi analiziramo geometrijo, le povezati in aktivirati je potrebno ustrezne gradnike v GH; kot je recimo izris in analiza linije prereza ali prerez dveh prostorskih teles. V eksperimentalnem delu je zbranih nekaj praktičnih primerov uporabe CASP in postopki za izboljšavo dizajnerskega procesa za nadaljnjo uporabo. Prikazana je uporaba CASP metode na sedežih profesionalnih tekmovalnih koles, na računalniških miškah, na obrazih, na zadku avtomobila Tushek & Spigel – TS 600 in na obrezilnih orodjih za industrijske stiskalnice. Predstavljena je metoda, ki smo jo poimenovali DEGI, kjer uporabimo obstoječo geometrijo in jo vgradimo v nov izdelek.
Keywords:metodologija, dizajn, analiza, površje, računalniška grafika, modeliranje
Year of publishing:2015
Publisher:[A. Cupar]
Source:Maribor
UDC:004.925.8:[7.05:621](043.3)
COBISS_ID:282535168 New window
NUK URN:URN:SI:UM:DK:P4RBZPEA
Views:1040
Downloads:124
Metadata:XML RDF-CHPDL DC-XML DC-RDF
Categories:KTFMB - FS
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Secondary language

Language:English
Title:DEVELOPMENT OF CLASSIFICATION METHODOLOGY OF PERCEPTIONAL SURFACES IN PRODUCT DESIGN
Abstract:This work deals with the problem of surface evaluation. The surface can be elementary surface or surface compound of several elementary surfaces. It can also be 3D scan or any mesh model. Term perceptional surface is used to present surface that has key impact on perception of a product. At this point the aesthetic value is not important, however we are interested in the methodology which enables the evaluation. N×n, methodology is introduced, which runs within computer modeller Rhinoceros (RH) and its add-in Grasshopper (GH). In GH the procedure with standard GH components is set as a base. The result of this analysis is in first place the n×n matrix where n×n distances are collected and normalized alter on in normalized n×n matrix. From normalized n×n matrix the CASP properties are calculated. By using these four properties any surface can be evaluated. Term CASP stands for curvature, acceleration, symmetry and proportionality. The results are comparable only for elementary surfaces. Elementary surface is a surface with similar curvature or presents same shape feature or a part of it. For complex and compound surfaces the results can be compared merely for specific types of objects, e.g. just for human faces. Otherwise the compound surface can be segmented into elementary surfaces. Several intermediate evolutional phases are shown, but were later excluded from further research. Anyhow, different geometries can be analysed with proper components adjustment in GH that should be connected and activated, e. g. intersection line creation and analysis or intersection of two geometrical bodies. In the experimental part, the CASP methodology is represented by using concrete examples, in addition, some steps for design process improvement in future work are listed. The CASP methodology is shown on professional bike seats, on computer mice, on human faces, on Tushek & Spigel – TS 600 sports car tail and on cutting tools for industrial presses. At the end, the method we called DEGI is shown, where existing geometry is used and implemented in some newly created product.
Keywords:methodology, design, analysis, surface, computer graphics, modelling


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