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An online coherence-based BCI for driving a mechanical arm

An online coherence-based BCI for driving a mechanical arm

引用

2012 ISSNIP Biosignals and Biorobotics Conference: Biosignals and Robotics for Better and Safer Living, BRC 2012

作者： Abdalla, Marcos Antônio Barroso, Marcio Falcão Santos Felix, Leonardo Bonato Post-Graduation Engineering Program Federal University of São João Del-Rei São João del-Rei - MG Brazil Department of Electrical Engineering Federal University of Viçosa Viçosa-MG Brazil

ISBN: (纸本)9781467324762

The present work describes the simulation to be used in the control of a mechanical arm using a Visual Evoked Potential to drive a Brain Computer Interface system. The signal processing and classifying was done using the Multiple Coherence K2N. The proposed classifier was able to detect the difference between four different frequencies presented at the same time. The Multiple Coherence classifier had a hit rate of 95%. © 2012 IEEE.

关键词： Brain computer interface

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Active power filters compensator implementation using parallel structures in FPGA devices

Active power filters compensator implementation using parall...

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IEEE/IAS International Conference on Industry Applications (INDUSCON)

作者： Alexsandro B. Lopes Fábio Favarim Emerson G. Carati Electrical Engineering Post-Graduation Program Federal University of Technology-Paraná Pato Branco Parana Brazil

ISBN: (纸本)9781467324120

This paper presents a parallel implementation approach of selective harmonic compensator for active power filters. This approach uses field programmable gate array (FPGAs) in order to reduce the compensator computational time. To compensate for even a small number of harmonics digital filters require multiple calculation instructions involving multiplications and additions. Thus, to improve the performance of the computer system it is proposed the digital compensator implementation using parallel structures in FPGA devices. Experimental results are presented to compare the speedup of the proposed parallel approach with the DSP sequential execution time conventionally used in active power filters applications.

关键词： Harmonic analysis Power harmonic filters Field programmable gate arrays Active filters Digital signal processing Performance evaluation

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High step-up voltage gain integrated DC/DC converters

High step-up voltage gain integrated DC/DC converters

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IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG)

作者： Jacson R. Dreher Filipe Marangoni Jorge L. R. Ortiz Mário L. da S. Martins Helder T. Camara Leandro D. Flora Post-Graduation Program on Electric Engineering-PPGEE iNOVAR Research Group UTFPR Pato Branco Parana Brazil Control Engineering Department Danfoss Drives A/S Grasten Denmark

This paper presents a systematic methodology to generate high step-up voltage gain converters based on the combination of two standard DC/DC converters. The converters are combined so that their input sections are integrated reducing the converter component count. Their output sections are associated to derive three basic configurations, the series, the parallel and the cascade outputs. The paper presents as an example, the integration of the boost and flyback converters for which the voltage gain and efficiency in steady state are analyzed. Comparative experimental results among the three integrated boost-flyback laboratory prototypes are carried out. It shows that the Series-IBF and the Cascade-IBF present better and similar performance when compared to the Parallel-IBF converter.

关键词： Topology Switches Capacitors Inductors DC-DC power converters Stress Standards

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FPGA based implementation of a Fuzzy Neural Network modular architecture for embedded systems

FPGA based implementation of a Fuzzy Neural Network modular ...

引用

International Joint Conference on Neural Networks (IJCNN)

作者： R. N. A. Prado J. D. Melo J. A. N. Oliveira A. D. Dória Neto Post Graduation Program on Electrical and Computational Engineering Federal University of Rio Grande do Norte Natal Brazil

This paper presents a FPGA based approach for a modular architecture of Fuzzy Neural Networks (FNN) to embed with easily different topologies set up. The project is based on a Takagi - Hayashi (T-H) method for the construction and tuning of fuzzy rules, this is commonly referred as neural network driven fuzzy reasoning. The proposed architecture approach consists of two main configurable modules: a Multilayer Perceptron - MLP with sigmoidal activation function that composes the first module to determine a Fuzzy membership function; the second employs an MLP with pure linear activation function to define the consequents. The DSPBuilder ® software along the Simulink ® is used to connect, set and synthesize the Fuzzy Neural Network desired. Other hardware components employed in the architecture proposed cooperate to the system modularity. The system was tested and validated through a control problem and an interpolation problem. Several papers proposed different hardware architecture to implement hybrid systems by using Fuzzy logic and Neural Network. However, there is no approach with this specific neural network driven fuzzy reasoning by T-H method and the aim to be embedded. The Self-Organizing Map (SOM) and Levenberg-Marquardt backpropagation were used to train the FNN proposed off-line.

关键词： Fuzzy neural networks Neurons Fuzzy control Computer architecture Field programmable gate arrays Hardware Neural networks

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Active power filter operation of an electric vehicle applied to single-phase networks

Active power filter operation of an electric vehicle applied...

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IEEE/IAS International Conference on Industry Applications (INDUSCON)

作者： Márcio C. B. P. Rodrigues Henrique J. Schettino André A. Ferreira Pedro G. Barbosa Henrique A. C. Braga Power Electronics and Automation Group Electrical Engineering Post-Graduation Program Federal University of Juiz de Fora Juiz de Fora Brazil

ISBN: (纸本)9781467324120

This work proposes the application of a battery or plug-in electric vehicle powertrain on the mitigation of possible residential electricity network power quality problems by means of the integration of a shunt active power filter into its power electronics circuitry. The integration of additional functions to an electric vehicle is a very desirable feature, since it can result on cost reduction (in comparison to the separately implementation of the integrated functions). Simulation results provide evidence of the possible employment of power electronics converters, inherent to the vehicle propulsion system, in order to reduce harmonic content and improve power factor in single-phased electric networks.

关键词： Active filters Power harmonic filters Harmonic analysis Voltage control Electricity Vehicles

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Predictive Control via Multi-Parametric programming Applied to the Dynamic Model of a Robotic Wheelchair

Predictive Control via Multi-Parametric Programming Applied ...

引用

IEEE Latin American Robotics Symposium, LARS

作者： Gustavo P. C. Weinkeller José L. F. Salles Teodiano F.B. Filho Department of Automatic Control Engineering Faculdade do Centro Leste UCL Vitoria Brazil Post-Graduation Program in Electrical Engineering Federal University of Espirito Santo Vitoria Brazil

This paper proposes the use of an explicit dynamic predictive control which is a PWA (PieceWise Affine) function of the dynamic model states of a robotic wheelchair. The optimization algorithmic is based on Multi-parametrical programming, allowing all calculations of this controller be performed off-line, before starting the system operation, resulting in a reduction of online computational time. Some simulation and experimental results illustrate the effectiveness of the proposed method.

关键词： Mobile robots Wheelchairs Mathematical model Predictive control programming Predictive models

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Applying MVC to Evolutionary Acquisition IRPM

Applying MVC to Evolutionary Acquisition IRPM

引用

2012 International Conference on Smart Grid Systems(ICSGS 2012)

作者： Patrick Letouze Mariwaldo G. Caetano Joāo Y. Ishihara David Prata George Brito UFT-Federal University of Tocantins Brazil:Department of Computer Science UnB-University of Brasilia Brazil:Department of Electrical EngineeringPGEA-Program of Post-Graduation in Electronic and Automation Systems Engineering

This work presents a combination of the Model-View-Controller pattern with the Evolutionary Acquisition Interdisciplinary Research Project Management for web services *** intends to promote an increase in productivity and to facilitate interdisciplinary web services *** consists of an independent database for users' feedback that together with technological opportunities and evolving threats considerations may start a new release of the system allowing a dynamic evolution through acquiring new features or correcting errors,but the new release decision is not *** other words,web service evolution is accomplished adding requirements analysis into the Model-View-Controller pattern,which is incorporated into Interdisciplinary Research Project Management.

关键词： Evolutionary acquisition,IRPM,MVC,project management,software engineering,web services.

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An online coherence-based BCI for driving a mechanical arm

An online coherence-based BCI for driving a mechanical arm

引用

Biosignals and Biorobotics Conference (BRC), ISSNIP

作者： Marcos Antônio Abdalla Marcio Falcão Santos Barroso Leonardo Bonato Felix Post-Graduation Engineering Program Federal University of São João del Rei Sao Joao del Rei Minas Gerais Brazil Department of Electrical Engineering Federal University of Viçosa Vicosa Minas Gerais Brazil

The present work describes the simulation to be used in the control of a mechanical arm using a Visual Evoked Potential to drive a Brain Computer Interface system. The signal processing and classifying was done using the Multiple Coherence K 2 N . The proposed classifier was able to detect the difference between four different frequencies presented at the same time. The Multiple Coherence classifier had a hit rate of 95%.

关键词： Coherence Electroencephalography Signal to noise ratio Brain modeling Equations Mathematical model

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Generalized state-space model for the interleaved buck converter

Generalized state-space model for the interleaved buck conve...

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Brazilian Power Electronics Conference, COBEP

作者： Andressa C. Schittler Douglas Pappis Cassiano Rech Alexandre Campos Marco A. Dalla Costa Electrical Engineering Post-Graduation Program-PPGEE Electronic Ballast Research Group-GEDRE Federal University of Santa Maria Santa Maria Rio Grande do Sul Brazil Electrical Engineering Post-Graduation Program-PPGEE Power Electronics and Control Group-GEPOC Federal University of Santa Maria Santa Maria Rio Grande do Sul Brazil

This paper presents a complete AC small-signal general model for the interleaved buck converter (IBC) operating in continuous conduction mode. Average state-space technique is used and the most important parasitic elements are included. A ready-to-use generalized model for n-cells structure is developed by obtaining its DC model and AC small-signal model for a certain operation point. Besides, it is presented an n-cells inductor value analysis against duty-cycle and a second-order model is derived from that, which can replace the complete model with accuracy, simplifying the dynamics analysis. Models have been successfully verified experimentally, and compared via simulation in Matlab/Simulink.

关键词： Inductors Mathematical model Switches Integrated circuit modeling Logic gates Inductance Analytical models

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New methodology to determinate photovoltaic parameters of solar panels

New methodology to determinate photovoltaic parameters of so...

引用

Brazilian Power Electronics Conference, COBEP

作者： F.A. Farret J.M. Lenz J.G. Trapp Center of Studies in Energy and Environment (CEEMA) Post-Graduation Program in Electrical Engineering (PPGEE) Technology Center Federal University of Santa Maria - UFSM Santa Maria - RS Brazil

This paper presents a discussion about a methodology to obtain the main parameters of solar panels and power converters in photovoltaic systems. This study is essential to obtain the maximum power transfer from the PV source to the mains grid or a load. It is also presented a formal mathematical model based on the experimental data acquisition of the key parameters of a photovoltaic cell which are: shunt and series resistances, photo generated current, the ideality factor and the diode reverse saturation current.

关键词： Mathematical model Photovoltaic systems Photovoltaic cells Equations Resistance Current measurement

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