Applied Electronics 2017 Domovská stránka kolekce Zobrazit statistiky

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Záznamy kolekce (řazeno podle Datum zaslání v sestupně pořadí): 41 až 56 z 56
Košťál, Tomáš
Offline induction machine parameters identification suitable for self-commissioning

Precise control methods of the electric drives with induction machines like field oriented control (FOC) or direct torque control (DTC) need an accurate model of the machine they control. Certain parameters of the model have to be obtained with sufficient accuracy before the drive&...

Košík, Michal , Fajtl, Radek , Lettl, Jiří
Theoretical evaluation of bifurcation in dependence on resonance frequency in two-coil inductive power transfer

Operation of two-coil inductive power transfer (IPX) system is affected by bifurcation phenomenon. In this paper, bifurcation in dependency on resonance frequency is examined. At first, voltage equations are analyzed, and impedance and transfer function derived. In next step, condition for r...

Lettl, Jiří , Karlovský, Pavel
Influence of speed and flux estimation by Luenberger observer on IM drive with DTC

The direct torque control (DTC) strategy is one of the most performance methods for induction machine (IM) drive torque control. The controlled stator magnetic flux and torque cannot be easily measured and therefore must be calculated using an IM mathematical model. This paper exam...

Jílek, Jiří , Štork, Milan
Assessing left ventricular ejection time from wrist cuff pulse waveforms: Algorithm and evaluation

Left ventricular ejection time (LVET) is an important component of systolic time intervals. It has been used as a surrogate for left ventricular contractility and stroke volume. We developed a method for the assessment of LVET from wrist cuff pulse waveforms. The waveforms are ...

Chen, Pi-Yun , Chen, Wei-Lun , Pai, Neng-Sheng , Chou, Min-Hung , Huang, Guo-Shing , Chang, Che-Yuan
Implement of a 6-DOF manipulator with machine vision and machine learning algorithms

This paper explores the application of a Machine Vision and Machine Learning Algorithm to a Manipulator with six degrees of freedom (6-DOF). A Kinect sensor were used to extract images from a screen and obtain the relevant target information. Image processing was accomplished using...

Draxler, Karel , Styblíková, Renata
Calibration of instrument current transformers at low currents using lock-in amplifier

A system for evaluating instrument current transformer errors using a lock-in amplifier is described in the paper. The difference between the standard and the transformer under test is evaluated as the ratio error and the phase displacement. The attention is focused to measurement ...

Dostálek, Libor , Šafařík, Jiří
Strong password authentication with AKA authentication mechanism

This contribution discusses algorithms for strong authentication of applications in mobile devices. The current LTE and IMS networks provide strong authentication using USIM smart cards based on AKA algorithm. The problem of this authentication is that this authentication is under the sole&#...

Doerr, Laurin , Fiala, Dalibor , Heigl, Michael , Schramm, Martin
Assessment simulation model for uncoupled message authentication

Today's trend of an increasing number of networked embedded devices pervades many areas. Ranging from home automation, industrial or automotive applications with a large number of different protocols, low resources and often high demands on real-time make it difficult to secure the ...

Černý, Jan , Masopust, Jiří
Interference optimization and mitigation for LTE networks

This paper talks about the most problematic issues brought by interferences in the New Generation Networks and their impact on the network s data throughput with focus on the inter-cell interferences. The most important ways to avoid interferences while planning a network are menti...

Čech, Jiří , Rozkovec, Martin
Detecting LWIR filters using hyperspectral camera and neural networks

We present detection of various filters using neural networks usable for our Long wave infrared (LWIR) hyperspectral detection system (HDES). Some reduction techniques are shown, for our aim of the small neural network with small computing requirements. In addition, the filter measurement&#x...

Bizon, Nicu , Culcer, Mihai , Iana, Gabriel , Laurentiu, Ionescu , Mazare, Alin , Iliescu, Mariana
Real-time strategy to optimize the airflow rate of fuel cell hybrid power source under variable load cycle

This paper proposes a Real-time optimization (RTO) strategy for Fuel Cell Hybrid Power Sources based on Global Extremum Seeking (GES) control of the air flow. The performance is shown in comparison with Static Feed-Forward RTO strategy.

Bhajana, V.V.Subrahmanya Kumar , Drábek, Pavel , Aylapogu, Pramod Kumar
A novel ZCS high step-up DC-DC converter for energy storage systems in DC traction vehicles

This paper proposes a new soft-switched High Step-up DC-DC converter for energy storage systems in DC traction vehicles. In this converter, soft-switching operation, i.e., zero current switching has been obtained by employing dual resonant auxiliary circuits to the conventional step-up DC-DC ...

Berešík, Roman , Puttera, Jozef , Jurčo, Jozef
Feature generation for seismic and acoustic signals based on Hilbert-Huang transform

The successful detection and classification of events require using signal processing algorithms suitable for analysis of nonlinear and nonstationary signals like seismic and acoustic ones. A key point of the signal classification is to generate the feature vector by the means whose sig...

Bauer, Jan
Output voltage estimation for matrix converter

This paper describes influence real semiconductor devices, commutation strategies, modulation period selection and switch on resp. switch off times on output voltage of matrix converter. Methods for decreasing of the influence are mentioned in the paper too.

Horia-Nicolai L., Teodorescu
Sensors based on nonlinear dynamic systems – A survey

Nonlinear systems able to develop chaotic dynamics have a tremendous potential in a large class of applications, because of the complexity of the behavior they exhibit and of the sensitivity of their operation to the process parameters. While these properties have been seen as ...

Pinker, Jiří
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Záznamy kolekce (řazeno podle Datum zaslání v sestupně pořadí): 41 až 56 z 56