National Repository of Grey Literature 13 records found  1 - 10next  jump to record: Search took 0.01 seconds. 
Design of the dilatation pad for linear encoder
Moravanský, Richard ; Hadraba, Petr (referee) ; Štěpánek, Vojtěch (advisor)
The bachelor’s thesis deals with the issue of linear length sensors, their dividing, construction, temperature effects and design of an dilatation pad. The aim of the work is a professional search on the topic of linear length sensors, design of variants of the pad and the associated recommendation for practice. The chapter of current knowledge is dedicated to basic knowledge about position sensors, ie. converter sensor connection types. The following chapter is about the description of the basic parts of linear systems, specifically the method of drive and lead in linear systems. After clarifying the concepts, the chapter of linear length sensors will be explained. The chapter deals in more depth with position measurement in linear systems, photoelectric sensing, and a linear encoder from HEIDENHEIN. As the last part of the theory, the analysis of thermal effects is presented. The practical part describes the design of variants of dilatation pad and assembly of elements that allow expansion, their connection and clamping. In the final part, the best variant and recommendation for practice is suggested.
Representation of Solutions of Linear Discrete Systems with Delay
Morávková, Blanka ; Růžičková, Miroslava (referee) ; Khusainov, Denys (referee) ; Diblík, Josef (advisor)
Disertační práce se zabývá lineárními diskrétními systémy s konstantními maticemi a s jedním nebo dvěma zpožděními. Hlavním cílem je odvodit vzorce analyticky popisující řešení počátečních úloh. K tomu jsou definovány speciální maticové funkce zvané diskrétní maticové zpožděné exponenciály a je dokázána jejich základní vlastnost. Tyto speciální maticové funkce jsou základem analytických vzorců reprezentujících řešení počáteční úlohy. Nejprve je uvažována počáteční úloha s impulsy, které působí na řešení v některých předepsaných bodech, a jsou odvozeny vzorce popisující řešení této úlohy. V další části disertační práce jsou definovány dvě různé diskrétní maticové zpožděné exponenciály pro dvě zpoždění a jsou dokázány jejich základní vlastnosti. Tyto diskrétní maticové zpožděné exponenciály nám dávají možnost najít reprezentaci řešení lineárních systémů se dvěma zpožděními. Tato řešení jsou konstruována v poslední kapitole disertační práce, kde je řešení tohoto problému dáno pomocí dvou různých vzorců.
Interval linear systems with linear dependencies
Král, Ondřej ; Hladík, Milan (advisor) ; Rada, Miroslav (referee)
The main problem discussed in this thesis is about finding an enclo- sure of the solution set of an interval linear system with linear dependencies. We get familiar with definitions from interval arithmetic and analysis. Then we extend them to matrices and linear systems, where we introduce several modern approaches to finding an enclosure and divide them thematically. Most of them are implemented in MATLAB using INTLAB library. We compare their precision and computational time on Toeplitz, symmetric and random matrices. For depen- dencies we design our memory saving representation. The results are interpreted and the final function, which can compute either fast, sharp or memory efficient, is build on individual methods. Powered by TCPDF (www.tcpdf.org)
Matrix computations for mixtures and solutions
Voborníková, Iveta ; Duintjer Tebbens, Erik Jurjen (advisor) ; Bernhauerová, Veronika (referee)
Charles University in Prague, Faculty of Pharmacy in Hradec Králové Department of Biophysics and Physical Chemistry Candidate: Iveta Voborníková Thesis supervisor: doc. Dipl.-Math. Erik Jurjen Duintjer Tebbens, Ph.D. Title of diploma thesis: Matrix computations for mixtures and solutions In this work, we determined drug concentrations from mixtures using multicompo- nent analysis without separating them. The condition was the knowledge of the molar absorption coefficients of individual drugs for certain wavelenghts. To do this, we used tools from matrix calculations, especially the Moore-Penrose inverse, and we were in- terested in whether we would achieve more accurate results using standard, square systems or overdetermined systems of linear equations. Based on the results, we came to the conclusion that there is no dependence between the accuracy of the results and the number of wavelengths used. Only in some cases did the results appear to be more accurate when using overdetermined systems with a higher number of wavelengths. Keywords: mixtures, solutions, linear systems, least squares problems, Moore-Penrose pseudoinverses 1
Design of the dilatation pad for linear encoder
Moravanský, Richard ; Hadraba, Petr (referee) ; Štěpánek, Vojtěch (advisor)
The bachelor’s thesis deals with the issue of linear length sensors, their dividing, construction, temperature effects and design of an dilatation pad. The aim of the work is a professional search on the topic of linear length sensors, design of variants of the pad and the associated recommendation for practice. The chapter of current knowledge is dedicated to basic knowledge about position sensors, ie. converter sensor connection types. The following chapter is about the description of the basic parts of linear systems, specifically the method of drive and lead in linear systems. After clarifying the concepts, the chapter of linear length sensors will be explained. The chapter deals in more depth with position measurement in linear systems, photoelectric sensing, and a linear encoder from HEIDENHEIN. As the last part of the theory, the analysis of thermal effects is presented. The practical part describes the design of variants of dilatation pad and assembly of elements that allow expansion, their connection and clamping. In the final part, the best variant and recommendation for practice is suggested.
Interval linear systems with linear dependencies
Král, Ondřej ; Hladík, Milan (advisor) ; Rada, Miroslav (referee)
The main problem discussed in this thesis is about finding an enclo- sure of the solution set of an interval linear system with linear dependencies. We get familiar with definitions from interval arithmetic and analysis. Then we extend them to matrices and linear systems, where we introduce several modern approaches to finding an enclosure and divide them thematically. Most of them are implemented in MATLAB using INTLAB library. We compare their precision and computational time on Toeplitz, symmetric and random matrices. For depen- dencies we design our memory saving representation. The results are interpreted and the final function, which can compute either fast, sharp or memory efficient, is build on individual methods. Powered by TCPDF (www.tcpdf.org)
Representation of Solutions of Linear Discrete Systems with Delay
Morávková, Blanka ; Růžičková, Miroslava (referee) ; Khusainov, Denys (referee) ; Diblík, Josef (advisor)
Disertační práce se zabývá lineárními diskrétními systémy s konstantními maticemi a s jedním nebo dvěma zpožděními. Hlavním cílem je odvodit vzorce analyticky popisující řešení počátečních úloh. K tomu jsou definovány speciální maticové funkce zvané diskrétní maticové zpožděné exponenciály a je dokázána jejich základní vlastnost. Tyto speciální maticové funkce jsou základem analytických vzorců reprezentujících řešení počáteční úlohy. Nejprve je uvažována počáteční úloha s impulsy, které působí na řešení v některých předepsaných bodech, a jsou odvozeny vzorce popisující řešení této úlohy. V další části disertační práce jsou definovány dvě různé diskrétní maticové zpožděné exponenciály pro dvě zpoždění a jsou dokázány jejich základní vlastnosti. Tyto diskrétní maticové zpožděné exponenciály nám dávají možnost najít reprezentaci řešení lineárních systémů se dvěma zpožděními. Tato řešení jsou konstruována v poslední kapitole disertační práce, kde je řešení tohoto problému dáno pomocí dvou různých vzorců.
Problém řízení H_2 pro deskriptorové systémy
Kučera, Vladimír
A solution of the H_2 control problem is presented for linear descriptor systems. The solution proceeds in two steps. Firstly, the set of all controllers that stabilize the control system is parametrized. The mathematical tool applied are doubly coprime, proper stable factorizations of rational matrices. The factors are expressed in terms of stabilizing descriptor feedback and output injection gains, which represent degrees of freedom that can be used in the subsequent optimization.
Polynomial matrices, LMIs and static output feedback
Henrion, Didier ; Kučera, V.
In the polynomial approach to systems control, the static output feedback problem can be formulated as follows: given two polynomial matrices D(s) and N(s), find a constant matrix K such that polynomial matrix D(s)+KN(s) is stable. In this paper, we show that solving this problem amounts to solving a linear matrix inequality with a non-convex rank constraint.
Rank-one LMI approach to robust stability of polynomial matrices
Henrion, Didier ; Sugimoto, K. ; Šebek, M.
Necessary and sufficient conditions are formulated for checking robust stability of an uncertain polynomial matrix. Various stability regions and uncertainty models are handled in a unified way. The conditions, stemming from a general optimization methodology similar to the one used in mu-analysis, are expressed as a rank-one LMI, a non-convex problem frequently arising in robust control.

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