Wyniki wyszukiwania - BazTech

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Introduction to the technical and economic analysis of the production process with the use of computer simulation

Ogorzałek Justyna

Journal of Mechanical and Energy Engineering

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2019

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Vol. 3, No 2

121--130

EN

The article presents the most important information concerning the methods, techniques and indicators of I measures, which are used in the evaluation of production processes. The theory of limitations, process mapping, benchmarking and diagnostic test method have been described. Sample indicators for the evaluation of production processes are presented and the measures for the evaluation of production processes are discussed, as well as methods of obtaining information about the process. The modelling and computer simulations were described and the algorithm of proceeding during the development of a simulation model was presented. The article discusses system dynamics modelling, discrete event modelling and agent modelling.

2

Dyskretny model sieci trakcyjnej w badaniach dynamiki układu mechanicznego odbierak prądu - sieć trakcyjna

Kobielski A.

Czasopismo Techniczne. Elektrotechnika

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2009

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R. 106, z. 1-E

123--131

PL

W pracy przedstawiono zagadnienie modelowania układu drgającego odbierak prądu -sieć trakcyjna jako modelu dyskretnego z masą zredukowaną sieci trakcyjnej jako zmienną w czasie. Wykazano, że w publikacjach zagranicznych dotyczących tego tematu nie uwzględnia się definicji siły jako pochodnej pędu względem czasu, co dla układów o zmiennej masie jest szczególnie istotne. W pracy przedstawiono porównanie wstępnych wyników ,symulacji wybranego modelu układu odbierak prądu - sieć trakcyjna z uwzględnieniem w równaniach ruchu układu pochodnej masy względem czasu i bez jej uwzględnienia. jak to jest stosowane w literaturze zagranicznej.

EN

This paper is concerned with the dynamics of the overhead contact system for current collection on electrified railway lines. Presented paper consist an especially problem of time-varying mass in dynamics. This problem exist in modelling of railway pantograph-overhead catenary system vibration too. In this domain various model s are introduced to describe the overhead equipment and the pantograph. Author of this paper presents own experiments and results of computer simulation. For this reason the simplified model of pantograph-catenary system was used.

3

A Possibility of Vibration Surveillance of Linear Unsteady Systems at Energy Performance Index

Kaliński K. J.

Mechanika / Akademia Górniczo-Hutnicza im. St. Staszica

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2003

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T. 22, z. 3

299-306

EN

The paper is devoted to Vibration surveillance of unsteady systems, which are idealised by the finite element method. In order to reduce a level of Vibration, external control command is introduced. It is a special case of the active Vibration control and the dynamics of controlled system with changing in time coefficients is described. Here is defined an algebraic performance index, whose values change with time. It comprises influence of kinetic and potential energies of Vibration, and also control energy. Optimal control command is generated on-line, with presumed sample ratio. Thus, the formulation is better than ones based on an integral performance index. The other advantage is that the approach proposed does not require an examination of controllability and observability of the system. Consideration concerns either whole vibrating system, or one being reduced. As illustrative example of the approach, time-domain vibration surveillance of railway weighing device is elaborated.