Modeliranje z ravninskimi polinomskimi krivuljami s pitagorejskim hodografom

magistrsko delo

Neža Dimec (Author), Emil Žagar (Mentor)

Abstract

V tem delu je predstavljen problem konstrukcije gladkih zaobljenih vogalov z ravninskimi polinomskimi krivuljami s pitagorejskim hodografom (PH krivuljami). $G^1$ vogal je enolično določen s PH kubično krivuljo. Podobno je $G^2$ vogal enolično določen s PH krivuljo stopnje 5. Da pridobimo proste parametre, s katerimi lahko prilagajamo profil ukrivljenosti konstruiranega $G^2$ vogala, je potrebna obravnava PH krivulj stopnje 7. Kot alternativa je predstavljena konstrukcija $G^2$ vogala z zlepkom iz dveh PH krivulj stopnje 5. Izpeljane sheme za konstrukcijo zaobljenih vogalov so odlikovane z računskimi prednostmi PH krivulj. Te jim zagotavljajo možno uporabo na različnih področjih znanosti: industrija, robotika, 3D tiskanje itd. V tem delu je predstavljena aplikacija s področja strojništva v povezavi s pohištveno industrijo.

Keywords

matematika;ravninska polinomska krivulja s pitagorejskim hodografom;PH krivulja;zaobljen vogal;simetrična interpolacija;G koda;CNC stroj;

Data

Language:	Slovenian
Year of publishing:	2018
Typology:	2.09 - Master's Thesis
Organization:	UL FMF - Faculty of Mathematics and Physics
Publisher:	[N. Dimec]
UDC:	519.6
COBISS:	18474073
Views:	807
Downloads:	271
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Modelling with planar polynomial Pythagorean-hodograph curves
Secondary abstract:	The problem of designing smoothly rounded corners with planar polynomial Pythagorean-hodograph (PH) curves is addressed. A $G^1$ corner can be uniquely specified as a single PH cubic segment. Similarly, a $G^2$ corner can be uniquely specified with a single PH quintic segment. To obtain $G^2$ corners incorporating shape freedoms that permit a fine tuning of a curvature profile, PH curves of degree 7 are required. As an alternative, a $G^2$ corner construction based upon splicing together two PH cuintic segments is proposed. The corner shapes constructed through these schemes can excel computational advantages of PH curves. Those ensure them many possible applications in different fields of science: industry, robotics, 3D printing etc. In this work a mechanical engineering application in connection to furniture industry is presented.
Secondary keywords:	mathematics;planar polynomial Pythagorean-hodograph curve;PH curve;rounded corner;symmetric interpolation;G code;CNC machine;
Type (COBISS):	Master's thesis/paper
Study programme:	0
Thesis comment:	Univ. v Ljubljani, Fak. za matematiko in fiziko, Oddelek za matematiko, Matematika - 2. stopnja
Pages:	XIII, 56 str.
ID:	10980328