Control of the weakly damped System with the embedded system support

This paper deals with the experimental verification of the importance of embedded systems with an applied MEMS sensor in controlling weakly damped systems. The aim is to suppress actively residual oscillations. The model of a planar physical pendulum with a prismatic joint was chosen for the experiment. The sensor made by MEMS technology, in which three-axis gyroscope and three-axis accelerometer are integrated, has been used for sensing the angle of deflection of the load from the equilibrium position. The simulation model represents the crane arm with a moving carriag

Thallium and its contents in Remata carbonate rocks

The article presents at first the list of thallium own minerals and its isomorphic content in other minerals, especially in Slovakian ore deposits. This trace element was found in numerous dolomite-rock samples from Remata massif near Handlová. An interesting level of Tl content was analyzed in nonsilicified rocks; the highest content of Tl (and Ag) are along the E W line of disturbance. The presence of thallium in some limonitic aggregates in close Kremnica-gold deposit indicate any continuous relation. Some similarities to type gold deposits Carlin ( USA ) are discussed, even if no gold and discrete thallium phases were in Remata determined yet

Wireless (power transfer) transmission of electrical energy (electricity) intended for consumer purposes up to 50 W

This project deals with Power Semiconductor Systems PSS for wireless transmission of electricity to the power of 50~W with regard to the distance and transmission efficiency. We decided to use electromagnetic resonance for electrical energy transmission. For experimental verification, we have wound two coils of identical dimensions. At a given power transmission solutions, we obtain the highest efficiency η = 70% at a distance of 5 cm, where the transmitted power was 48

Simulation of heat transfer and electromagnetic fields of protected microcomputers

The paper presents results of collaboration between Department of mechatronics and electronics at University of Žilina and VÚVT Engineering a.s. Žilina in area of heat transfer simulations and disturbing electromagnetic radiation simulations in computer construction. The simulations results were used in development of protected microcomputer prototypes in frame of applied research at both of workplaces

Protected microcomputers from VÚVT-Engineering

The paper presents properties of new protected microcomputer prototypes that recently developed VÚVTEngineering a.s. Žilina. The five new prototypes of protected microcomputers and displays provide users with important protection against radiated information leaking from a computer and suppress unfavorable effects of electromagnetic radiation on a man. The first part of contribution describes technical parameters of protected microcomputers and displays. The results of optical characteristics measurement and measurement of electric field radiation from the protected microcomputers are discussed in the second part of the contribution

The new implementation possibilities for electronic logical devices

This article deals with various technological approaches to realization of electronic logical devices. The accent is given on new possibilities of logic system implementation into single chip microelectronic devices designed on programmable and configurable basis

Analysis of field of temperature of power electronic systems in COMSOL MULTIPHYSICS environment

The paper deals with analysis of temperature field in power electronic devices using COMSOL MULTIPHYSICS software. It includes relevant problem of designing, specifically a power semiconductor converter. Till now, there has been one-dimensional interpretation of analysis considering heat transfer by conduction. Presented method results directly from differential equations of system heat balance, whereby heat transfer by conduction, flow and radiation is considered. The results can be animated in 3D view which enables analyzing the space-division switching network in power electronic device