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Collection's Items (Sorted by Submit Date in Descending order): 1 to 16 of 16
Dlouhý, Martin , Kotlan, Václav , Doležel, Ivo
Indirect induction hardening of thin electrically non-conductive layers

A model of indirect induction heating of very thin layers made of electrically non-conductive materials is presented. The model consists of two partial differential equations describing electromagnetic and temperature fields whose distributions are solved numerically. It is applicable for the des...

Kotlan, Václav , Hamar, Roman , Doležel, Ivo
Modeling of induction-assisted 3D laser printing

A mathematical model of induction-assisted 3D printing is presented, providing a tool for design of specified tracks printed on suitable substrates. The model consists of the non-stationary temperature field produced by laser beam and field of deformation produced by continuous adding the&#x...

Petrášová, Iveta , Karban, Pavel , Doležel, Ivo
Using Surrogate Model for Shape Optimization of Busbar

Methodology of shape optimization of the frequency converter blades, which are heated by Joule losses due to nonuniform current flow, is presented. For processing this coupled and nonlinear problem, its full mathematical model is replaced by a suitable equivalent model, on which the...

Karban, Pavel , Petrášová, Iveta , Doležel, Ivo
The principle of prediction of complex time-dependent nonlinear problems using RNN

An approach based on recurrent neural networks (RNNs) is applied to verify the possibility of using surrogate models for the prediction of dynamic nonlinear problems. Modeling complex time dependencies is currently still a challenge, when the structure of the neural network needs to...

Sodomka, Ondřej , Skřivan, Vojtěch , Jozová, Kateřina , Mach, František
Magnetically Controlled Microfluidic Channels

A technological framework for entirely soft microfluidic channels controlled by an external magnetic is pro-posed. The crucial part of the channel is a multilayer structure compounded of a magnetorheological elastomer (MRE) and additional nonmagnetic layers that provide unique properties to the&#...

Šroubová, Lenka , Slobodník, Karel , Naxer, Ondřej , Blohmann, Miroslav
Adaptive Model of Battery System Behavior for Electromobility

The aim of this paper is to optimize comparative value predicting the remaining electric vehicle's range. The paper deals with the mathematical model for a typical battery system used in electro mobility, in accordance with the real operating parameters, actual battery state, track&...

Šmucr, David , Vítek, Martin , Mach, František , Pospíšil, Karel
Non-contact Electromagnetic Actuator for a Ball Valve

The article deals with the issue of a fully electromagnetic non-contact actuator for a ball valve - a valve controlled by a purely electromagnetic field (direct drive) created by coils (electromagnets) placed outside the operating part of the valve.

Carvan, Ondřej , Juřík, Martin , Kuthan, Jiří , Vítek, Martin , Mach, František
Electronic Waste Separation Using Magnetic Minirobots

The research and applications of miniature robots are rapidly evolving. For robots that move with three degrees of freedom, the in-vivo appears to be the most promising application with the potential to change the paradigm in many fields of study. The applications of miniature ...

Lapuník, Vojtěch , Juřík, Martin , Vítek, Martin , Kuthan, Jiří , Mach, František
Magnetically Assembled Electronic Digital Materials

The concept of digital materials at the boundary of electric circuits and miniature robotics is studied. The main objective is to develop an experimental framework for the automatic assembly of basic electric circuits from the elementary modules. The framework is demonstrated on tiny&#x...

Karban, Pavel , Petrášová, Iveta , Doležel, Ivo
DC Motor Benchmark with Prediction Based on Mixture of Experts

The Mixture of Experts (MoE)–based approach is applied to verify the possibility of using surrogate models for searching the optima of complex multicriteria problems with constraints. This approach can successfully solve problems when the design space is limited by a higher number of&#x...

Kohout, Jan , Šroubová, Lenka
Simulation of heat transfer and air flow inside the switchboard cabinet

Heat transfer and airflow inside the switchboard cabinet of a paragliding flight simulator is modeled with the aim to position its structural parts in the way that prevents them from excessive heating. Heat is produced by losses of electromagnetic origin in some of these parts...

Kohout, Jan , Šroubová, Lenka
Modeling of the heat transfer in the switchboard cabinet

This paper deals with the modeling of a heat transfer in the switchboard cabinet by using the COMSOL Multiphysics software. The heat transfer field distribution can be seen from a typical example and discussion of its results. Furthermore, the results of simulations&#...

Kotlan, Václav , Hamar, Roman , Slobodnik, Karel , Dolezel, Ivo
Modeling of temperature patterns and hardness of surfaces obtained by additive technique

Temperature patterns and hardness of surfaces produced by laser cladding is modeled. The mathematical model includes the description of all important physical phenomena taking part in the process. Experimental ...

Kotlan, Václav , Doležel, Ivo
Baking of thin electrically non-conductive layers by indirect induction heating

A model of baking electrically non-conductive thin layers (paints, lacquers and other covering material) is presented. The process of baking, whose purpose is to protect the metal substrate from unfavourable influences of environmental medium, is realized by indirect induction heating of the...

Petrášová, Iveta , Karban, Pavel , Forzan, M. , Doležel, Ivo , di Barba, P.
Sensitivity analysis of time of induction heating process on charge parameters

A model of determining the time necessary for ln­ duction heating of a ferromagnetic cylindrical charge to the Curie temperature ls presented, together w:lth findlng lts sensitivity to variable lnput parameters. Whlle the geometry or the lnductor and charge are known together wlth ...

Kuthan, Jiří , Juřík, Martin , Vítek, Martin , Mach, František
Collective planar actuation of miniature magnetic robots towards individual robot operation

Magnetic actuation technique for the collective operation of untethered miniature robots by uniform control input is presented. The technique allows us to actuate multiple robots simultaneously and enables us to prohibit the actuation of selected ones while others are still operated. Non-act...

Collection's Items (Sorted by Submit Date in Descending order): 1 to 16 of 16