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Remote lab experiment RC oscillator for learning of control
Suzana Uran, Darko Hercog, Karel Jezernik, 2006, izvirni znanstveni članek

Opis: In the paper a remote lab experiment RC oscillator used to support Web based learning, to support learning by doing, to learn control design and to minimize the gap between theory and practice is presented. The experiment was designed with a special care for visualisation of important control design parameters in Bode plot and Root-Locus diagram. The experiment is based on MATLAB, LABview and DSP2 learning module. Using RC oscillator experiment RC circuit step response based or sinusoidal response based analysis, P controller design using Bode plot or Root-locus, relations between control design parameters and control performance and discrepancy between theory and practice could be covered. A homework based on RC oscillator experiment is presented and obtained experiences are discussed.
Ključne besede: control learning, RC oscillator, remote lab
Objavljeno: 31.05.2012; Ogledov: 775; Prenosov: 8
.pdf Celotno besedilo (2,40 MB)

Combined edge detection using wavelet transform and signal registration
Dušan Heric, Damjan Zazula, 2006, izvirni znanstveni članek

Opis: This paper presents a novel edge detection algorithm, using Haar wavelet transform and signal registration. The proposed algorithm has two stages: (a) adaptive edge detection with the maximum entropy thresholding technique on time-scale plane and (b) edge linkage into a con tour line with signal registration in order to c1ose edge discontinuities and calculate a confidence index for contour linkages. This index measures the level of confidence in the linkage of two adjacent points in the con tour structure. Experimenting with synthetic images, we found out the lower level of confidence can be set to approximately e-2. The method was tested on 200 synthetic images at different signal-to-noise ratios (SNRs) and II clinical images. We assessed its reliability, accuracy and robustness using the mean absolute distance (MAD) metric and our confidence index. The results for MAD on synthetic images yield the mean of 0.7 points and standard deviation (std) of 0.14, while the mean confidence level is 0.48 with std of 0.19 (the values are averaged over SNRs from 3 to 50 dB each in 20 Monte-Carlo runs). Our assessment on clinical images, where the references were expert's annotations, give MAD equal1.36:1:: 0.36 (mean :1:: std) and confidence level equal 0.67 :1:: 0.25 (mean :1:: std).
Ključne besede: edge model, edge detection, wavelet transform, signal registration
Objavljeno: 31.05.2012; Ogledov: 920; Prenosov: 11
URL Celotno besedilo (0,00 KB)

All-fiber quasi-distributed polarimetric temperature sensor
Denis Đonlagić, Miran Lešič, 2006, izvirni znanstveni članek

Opis: This paper presents an all-fiber design of a quasi-distributed polarimetric temperature sensor array that utilizes commercially available single polarization and high birefringence fibers. The modulation depth of temperature induced loss and the operational temperature range of individual sensors in the network are set by the rotational alignment of fibers before fusion splicing and through fine adjustment of the sensing fiber lengths. A practical sensor network was built with sensors that operated in the temperature range from 0 to 100 C. Individual sensors in the network generatedtemperature dependent loss that changed proportionally from 0.9 to 1.8 dB. With current standard telecommunication OTDRs, more than 20 prototype sensors could be interrogated.
Ključne besede: fiber optics, sensors, temperature measurements, polarization, alignement, birefringence, polarization maintaining
Objavljeno: 31.05.2012; Ogledov: 1016; Prenosov: 5
URL Celotno besedilo (0,00 KB)

Dynamic two-axis model of a linear synchronous reluctance motor based on current and position-dependent characteristics of flux linkages
Gorazd Štumberger, Bojan Štumberger, Drago Dolinar, 2006, izvirni znanstveni članek

Opis: This paper analyses the impact of armature slotting and magnetically nonlinearand anisotropic iron core on the trajectories of a kinematically controlled linear synchronous reluctance motor (LSRM). A new magnetically nonlinear dynamic two-axis LSRM model is introduced in order to perform the analysis. The magnetic nonlinearities and slotting effects are accounted for by the current and position-dependent characteristics of flux linkages.
Ključne besede: devices motors, reluctance synchronous motor, iron core model
Objavljeno: 31.05.2012; Ogledov: 1029; Prenosov: 13
URL Celotno besedilo (0,00 KB)

In-line higher order mode filters based on long highly uniform fiber tapers
Denis Đonlagić, 2006, izvirni znanstveni članek

Opis: This paper presents a simple and effective design of taper-based higher order mode (HOM) filters that can effectively remove HOMs from the few-mode fibers. For this purpose, a taper manufacturing technique that allows the production of long and highly uniform tapers was developed. A filter performance was demonstrated on a standard single-mode telecommunication fiber operating at 850 nm. The HOM suppression was better than$-$39 dB, and the insertion loss ofthe fundamental mode was less than 0.15 dB.
Ključne besede: optical fibres, few moded fiber, fiber design, mode conversion, mode filter, noise figure, optical fiber dispersion, optical signal to noise, optical transmission systems, taper
Objavljeno: 31.05.2012; Ogledov: 867; Prenosov: 6
URL Celotno besedilo (0,00 KB)

Solar energy potential in the urban areas
Andrej Orgulan, Jože Voršič, Andrej Kosmačin, 2006, objavljeni znanstveni prispevek na konferenci

Ključne besede: solar energy, urban areas, photovoltaic converters
Objavljeno: 30.05.2012; Ogledov: 671; Prenosov: 11
URL Celotno besedilo (0,00 KB)

Osnove elektrotehnike za mehatronike
Peter Kitak, 2011, učbenik za višje in visoke šole

Ključne besede: elektrostatično polje, tokovno polje, magnetno polje, magnetni pojavi, energija magnetnega polja, učbenikitokokrogi, resonančni pojavi
Objavljeno: 28.02.2012; Ogledov: 1932; Prenosov: 85
URL Celotno besedilo (0,00 KB)

CAE/CAD v elektroniki
Tomaž Dogša, 2010, učbenik za višje in visoke šole

Ključne besede: elektronska vezja, računalniško načrtovanje vezij, simulacije, CAD, CAE, občutljivost vezij, variabilnost parametrov, tolerance, načrtovanje toleranc, učbeniki
Objavljeno: 02.07.2010; Ogledov: 2150; Prenosov: 153
.pdf Celotno besedilo (1,04 MB)

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