Wyniki wyszukiwania - BazTech

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Zastosowanie przekaźników PLC do realizacji algorytmów sterowania ogrzewaniem

Nowak K., Dombek G., Książkiewicz A., Bochenek B., Nowaczyk P., Pluta P.

Poznan University of Technology Academic Journals. Electrical Engineering

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2017

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No. 92

415--425

PL

W artykule przedstawiono techniczne kryteria doboru przekaźników programowalnych PLC wykorzystywanych w automatyce budynkowej. Zaprezentowane zostały również przykłady realizacji sterownia ogrzewaniem w oparciu o przekaźniki PLC firmy Lovato Electric. Przedstawiono rozwiązania umożliwiające dwustanowe sterowanie ogrzewaniem oraz sterowanie typu PID. W sposób szczegółowy omówiono realizację regulacji dwustanowej przy wykorzystaniu przedstawionego przekaźnika, sterowania dwustanowego z regulacją wartości zadanej i wizualizacją odczytu, a także realizację inteligentnego sterownika temperatury. Przedstawione zostały schematy blokowe umożliwiające realizację przedstawionych algorytmów sterownia ogrzewaniem oraz sposoby połączeń.

EN

The technical criteria for selection of programmable PLC relays used in building automation are presented in the article. Examples of implementation of heating control based on PLC relays from LOVATO Electric are presented. Solutions for digital heating and PID control are also presented. Implementation of the controller using the relay is discussed in detail. Digital control with adjustable setpoint and visualization of reading,as well as the implementation of intelligent temperature controller is described. Block diagrams and wiring methods are presented for implementation of heating control algorithms.

2

Efficient generator of structural topologies based on irregular cellular automata

Bochenek B., Tajs-Zielińska K.

Engineering Transactions

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2017

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Vol. 65, iss. 1

61--67

EN

Recent development of Cellular Automata implementation into optimal design problems has shown that the automaton can be an effective tool for generation of optimal topologies in engineering applications. Nevertheless, the vast majority of results have been obtained to date for regular lattices of cells. The aim of the present paper is therefore to extend the concept of Cellular Automata towards irregular grid of cells related to non-regular mesh of finite elements. Introducing irregular lattice of cells allows to reduce number of design variables without losing accuracy of results and without excessive increase of number of elements caused by using fine mesh for a whole structure. This paper proposes a novel Irregular Cellular Automata formulation that can be adapted to topology optimization of real structural elements. The effectiveness of proposed local update rule is illustrated by results of numerical generation of optimal topologies for selected spatial engineering structures.

3

A novel heuristic algorithm for minimum compliance topology optimization

Bochenek B., Mazur M.

Engineering Transactions

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2016

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Vol. 64, iss. 4

541--546

EN

The implementation of efficient and versatile methods to the generation of optimal topologies for engineering structural elements is one of the most important issues stimulating progress within the structural topology optimization area. Over the years, optimization problems have been typically solved by the use of classical gradient-based mathematical programming algorithms. Nowadays, these traditional techniques are more often replaced by other algorithms, usually by the ones based on heuristic rules. Heuristic optimization techniques are gaining widespread popularity among researchers because they are easy to implement numerically, do not require gradient information, and one can easily combine this type of algorithm with any finite element structural analysis code. In this paper, a novel heuristic algorithm for a minimum compliance topology optimization is proposed. Its effectiveness is illustrated by the results of numerical generation of optimal topologies for selected plane structures.

4

Optymalizacja belek i kolumn metodą automatu komórkowego

Bochenek B., Tajs-Zielińska K.

Czasopismo Techniczne. Mechanika

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2008

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R. 105, z. 4-M

19-30

PL

W artykule pokazano zastosowanie metody automatu komórkowego do optymalizacji zginanych belek i kolumn narażonych na utratę stateczności. Przedstawiono wybrane sformułowania problemów optymalnego kształtowania, w szczególności nowe ujęcie projektowania kolumny przy warunkach stateczności, które następnie zilustrowano przykładami numerycznej optymalizacji.

EN

This paper presents application of Cellular Automata concept to optimization of beams under transverse loading and columns exposed to buckling. Selected optimal design problems are formulated, in particular, a new approach to design of column under stability constraints is proposed, which are then illustrated by results of numerical optimization.

5

Discrete-continuum transition at interfaces of nanocomposites

Pyrz R., Bochenek B.

Bulletin of the Polish Academy of Sciences. Technical Sciences

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2007

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Vol. 55, nr 2

251-260

EN

A number of micromechanical investigations have been performed to predict behaviour of composite interfaces, showing that the detailed behaviour of the material at these interfaces frequently dominates the behaviour of the composite as a whole. The interfacial interaction is an extremely complex process due to continuous evolution of interfacial zones during deformation and this is particularly true for carbon nanotubes since the interfacial interaction is confined to the discrete molecular level. The atomic strain concept based upon Voronoi tessellation allows analyzing the molecular structure atom by atom, which may give a unique insight into deformation phenomena operative at molecular level such as interface behaviour in nanocomposites.