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Your search keyword '"Giaouris, D."' showing total 98 results
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98 results on '"Giaouris, D."'

2. Application of Neural Networks Solar Radiation Prediction for Hybrid Renewable Energy Systems

Author

Chatziagorakis, P., Elmasides, C., Sirakoulis, G. Ch., Karafyllidis, I., Andreadis, I., Georgoulas, N., Giaouris, D., Papadopoulos, A. I., Ziogou, C., Ipsakis, D., Papadopoulou, S., Seferlis, P., Stergiopoulos, F., Voutetakis, S., Junqueira Barbosa, Simone Diniz, Series editor, Chen, Phoebe, Series editor, Cuzzocrea, Alfredo, Series editor, Du, Xiaoyong, Series editor, Filipe, Joaquim, Series editor, Kara, Orhun, Series editor, Kotenko, Igor, Series editor, Sivalingam, Krishna M., Series editor, Ślęzak, Dominik, Series editor, Washio, Takashi, Series editor, Yang, Xiaokang, Series editor, Mladenov, Valeri, editor, Jayne, Chrisina, editor, and Iliadis, Lazaros, editor

Published
2014
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9. Application of Neural Networks Solar Radiation Prediction for Hybrid Renewable Energy Systems

Author

Chatziagorakis, P., primary, Elmasides, C., additional, Sirakoulis, G. Ch., additional, Karafyllidis, I., additional, Andreadis, I., additional, Georgoulas, N., additional, Giaouris, D., additional, Papadopoulos, A. I., additional, Ziogou, C., additional, Ipsakis, D., additional, Papadopoulou, S., additional, Seferlis, P., additional, Stergiopoulos, F., additional, and Voutetakis, S., additional

Published
2014
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12. Stability analysis and control of nonlinear phenomena in boost converters using model-based Takagi-Sugeno fuzzy approach

Author

Mehran, K., Giaouris, D., and Zahawi, B.

Subjects
Chaos theory -- Analysis, Electric current converters -- Analysis, Fuzzy algorithms -- Usage, Fuzzy logic -- Usage, Fuzzy systems -- Usage, Liapunov functions -- Usage, Electric current converter, Fuzzy logic, Business, Computers and office automation industries, Electronics, Electronics and electrical industries
Published
2010

13. Stability analysis of a high-step-Up DC grid-connected two-stage boost DC-DC converter

Author

El Aroudi A., Giaouris D., Mandal K., Banerjee S., Abusorrah A., Al-Hindawi M., and Al-Turki Y.

Subjects
Engineering (General). Civil engineering (General), TA1-2040
Abstract

High conversion ratio switching converters are used whenever there is a need to step-up dc source voltage level to a much higher output dc voltage level such as in photovoltaic systems, telecommunications and in some medical applications. A simple solution for achieving this high conversion ratio is by cascading different stages of dc-dc boost converters. The individual converters in such a cascaded system are usually designed separately applying classical design criteria. However these criteria may not be applicable for the complete cascaded system . This paper first presents a glimpse on the bifurcation behavior that a cascade connection of two boost converters can exhibit. It is shown that the desired periodic orbit can undergo period doubling leading to subharmonic oscillations and chaotic regimes. Then, in order to simplify the analysis the second stage is considered as constant current sink and design-oriented analysis is carried out to obtain stability boundaries in the parameter space by taking into account slope interactions between the state variables in the two-different stages.

Published
2014
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14. Self-compensation of DC-DC converters under peak current mode control

Author

El Aroudi, A., Mandal, K., Giaouris, D., Banerjee, S., Grup d'Automàtica i Electrònica Industrial, Enginyeria Electrònica, Elèctrica i Automàtica, and Universitat Rovira i Virgili

Subjects
Error compensation, Electronic engineering, DC-DC converters, 0013-5194, Oscil·lacions, Convertidors continu-continu, Ingeniería electrónica, Enginyeria electrònica, Electric inverters
Abstract

Filiació URV: SIMemòria A new self-compensation technique is proposed for eliminating subharmonic oscillation and chaotic regimes in dc-dc switching converters under peak current mode control. The proposed method extracts a control signal from the error between the inductor current and a suitable reference and does not require an external signal generator as in the conventional ramp compensation scheme. The analytical expressions of the control domain using Filippov method are obtained. Simulation results show that the proposed technique can be implemented using standard analogue devices and can effectively eliminate subharmonic and chaotic oscillations and can ensure a stable operation for a wide range of the duty ratio.

Published
2017
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21. Nonaveraged control‐oriented modeling and relative stability analysis of DC‐DC switching converters.

Author

Al‐Turki, Y., El Aroudi, A., Mandal, K., Giaouris, D., Abusorrah, A., Al Hindawi, M., and Banerjee, S.

Subjects
ELECTRONIC switch-mode DC-to-DC converters, STABILITY theory, FREQUENCY-domain analysis, PULSE width modulation, APPROXIMATION theory
Abstract

Summary: This paper presents a unified and exact nonaveraged approach to derive a frequency‐domain control‐oriented model for accurate prediction of the fast timescale dynamics and performances of switching converters with fixed frequency naturally sampled pulse width modulation and integrating feedback loop. Because the approach avoids averaging and approximations related to this process, a very good accuracy of the derived model is obtained. The main difference between the presented approach and the existing methodology for accurately predicting the behavior of switching converters is that, here, we break the feedback loop and we focus on analyzing the open‐loop gain and the effect of the system parameters on relative stability. This results in an approach much similar to control systems techniques rather than nonlinear dynamical system approaches. Consequently, the relative stability is tackled easily in the frequency domain. In particular, by treating the modulator as a gain depending on the operating point, the new model is formulated in such a way that standard control‐oriented tools such as Bode diagrams and root‐loci can be easily used. Therefore, the proposed approach gives some important issues like gain and phase margins that are highly useful in controller design. It is noticed that the crossover frequency, gain, and phase margins predicted by using the averaged model may deviate significantly from the actual values given by the proposed approach. The paper points out the sources of discrepancies and the theoretical results are validated by simulations using a circuit‐level switched model. [ABSTRACT FROM AUTHOR]

Published
2018
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