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Polynomial approach to control system design for a magnetic levitation system

F. Gazdos, P. Dostal, R. Pelikan

Abstract


The contribution deals with the problem of designing a control system for a magnetic levitation apparatus. The proposed procedure uses a polynomial approach for control system design with control structure having two feedback controllers. In the paper, necessary conditions for control system stability, reference tracking and load disturbance attenuation are derived together with a methodology for optimal setting of the controllers’ parameters. Although the system is unstable and nonlinear in nature, it is shown that it is not problematic to control it by means of linear controllers with parameters set in a robust way.

Keywords


Algebraic approaches, Polynomial methods, Model-based control, Magnetic levitation system, CE 152, Robust control
Full paper

2009-12-23

Using Fuzzy Model as a Solution of the Damage Target Identification System

Pavel VASICEK

Abstract


This article discusses the possibilities of extent damage target identification as a new system that can be used in modern battles in the most places in the world or against the terrorism in advantage. The first of all possible solutions this problem is using fuzzy logic model as a one part of artificial intelligence.

Keywords


Identification, extent damage target, fuzzy logic system.
Full paper

2009-12-22

The 2-Class And 3-Class Classifier Of FSK And PSK Signals Based On Karhunen-Loeve Transform

Marie Richterova, David Juracek, Antonin Mazalek

Abstract


This paper describes the using of Karhunen–Loeve transform (KLT) for the modulation recognition in HF and VHF bands. The input signal is pre-prossed and converted to the “phase image”. The method of clustering analysis was chosen by theoretic recommendations for 2–class recognizer and 3–class recognizer of FSK and PSK signals. KLT is provided on this image and itself performs the recognition by a minimum–distance classifier. The algorithm for a modulation recognition was realized in the programme Matlab. The tests designed algorithm was the implementation on real pattern signals.

Keywords


Karhune-Loeve transform, orthogonal transform, modulation recognition, modulation classifiers, digital modulation, signal processing, Matlab.
Full paper

2009-11-26

An object-oriented paradigm in the C programming language

Igor Košťál, Tibor Kmeť

Abstract


Algorithms are an essential part of a programming process. Nowadays, different
programming paradigms and different programming languages for implementing algorithms in some computing problem-solving programs can be exploited by programmers or students of programming. This paper deals with using an object-oriented paradigm in the C procedural imperative language. The paper shows such uncommon use of an object-oriented paradigm in the C language in a program solving a particular programming task. Furthermore, it deals with advantages and disadvantages of object-oriented programming in the C language and it compares the use of an object-oriented paradigm in the C non-object-oriented language and in the C++ object-oriented language by comparison of solutions of the same task by this paradigm in both of these languages. Also it compares the use of an object-oriented paradigm and a procedural paradigm in the C language by comparison of two different solutions of the same task. An object-oriented paradigm is used in one solution and a procedural paradigm is used in the second solution. On the basis of the analysis and comparison of all of these solutions the article presents advantages and disadvantages of object-oriented programming in the C language.

Keywords


Programming paradigms, Programming and programming languages.
Full paper

2009-08-11

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