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ISSNIP Biosignals and Biorobotics Conference

作者： Valadao, Carlos Bastos, Teodiano Freire Bortole, Magdo Perim, Victor Celino, Daniel Rodor, Fauzi Goncalves, Agda Ferasoli, Humberto Electrical Engineering Post-Graduation Program Universidade Federal Do Espírito Santo1 Fernando Ferrari Av. 514 29075-910 Vitória Brazil Universidade Estadual Paulista Av. Eng. Luiz Edmundo C. Coube 14-01 17033-360 Bauru-SP Brazil

ISBN: (纸本)9781424482122

Severe disabled children have little chance of environmental and social exploration and discovery, and due this lack of interaction and independency, it may lead to an idea that they are unable to do anything by themselves. This idea is called learned helplessness and is very negative for the child cognitive development and social development as well. With this entire situation it is very likely that the self-steam and mood of this child. Trying to help these children on this situation, educational robotics can offer and aid, once it can give them a certain degree of independency in exploration of environment. The system developed in this work allows the child to transmit the commands to a robot. Sensors placed on the child's body can obtain information from head movement or muscle pulses to command the robot to carry the tasks. Also, this system can be used with a variety of robots, being necessary just a previous configuration. It is expected that, with the usage of this system, the disabled children have a better cognitive development and social interaction, balancing in a certain way, the negative effects of their disabilities. © 2011 IEEE.

关键词： Economic and social effects

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High power HID lamps electronic ballast based on the interleaved buck converter

High power HID lamps electronic ballast based on the interle...

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Brazilian Power Electronics Conference, COBEP

作者： Andressa C. Schittler Douglas Pappis 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

This paper presents an electronic ballast to supply high power (>; 400 W) high intensity discharge (HID) lamps based on interleaved converters. Due to HID lamps voltage source characteristics and their acoustic resonance issue, it is necessary to drive them with nearly constant current (reduced ripple) with a square-wave shape. Interleaved topologies become widely used as the output current levels of power converters increases. A well-known topology is the interleaved buck converter (IBC), which presents as main characteristic a low ripple output current source behavior. Therefore, an IBC can be advantageous for supplying high power HID lamps. The main goal of this paper is to introduce an IBC operating in continuous conduction mode (CCM) applied to electronic ballasts, in order to supply high power HID lamps. The IBC inductor design is the target point, since the number of cells, losses and inductor value strongly influence the overall performance in terms of size and efficiency. Inductances, magnetic core and semiconductors are analyzed and compared across the number of cells. Results are verified through simulation in PSIM software and experimentally.

关键词： High intensity discharge lamps Inductors Electronic ballasts Magnetic cores Logic gates Current control Proposals

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FC and PV emulation by buck converter based on experimental VxI curves and dynamic response

FC and PV emulation by buck converter based on experimental ...

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Brazilian Power Electronics Conference, COBEP

作者： Jordan G. Trapp Luciano P. de Lima Felix A. Farret Felipe T. Fernandes Gleisson Balen Center of Studies in Energy and Environment (CEEMA) Post-Graduation Program in Electrical Engineering (PPGEE) Technological Center Federal University of Santa Maria Santa Maria Rio Grande do Sul Brazil

This paper presents an emulation of fuel cell and photovoltaic modules based on the buck converter as a replacement of actual power sources for bench tests. This approach is suitable for power electronic designs involving power converters to interface source and DC loads or source and mains grid, without having available the real source. The output voltage of the buck converter is referred to lookup tables/equations with experimental data from actual sources under load variation to determinate the biasing curves and dynamic response. To validate the results, a comparison between simulated and practical results obtained from laboratory test with actual sources is performed. The energy source emulations with buck converters is a simple, safe, versatile, and effective way of physically representing DC sources for various laboratory tests.

关键词： Radiation effects Voltage control Mathematical model Fuel cells Transfer functions Emulation Laboratories

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Bootstrapping neural network regression model for motor drive vibration optimization through Genetic Algorithm

Bootstrapping neural network regression model for motor driv...

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IET 8th International Conference on Computation in Electromagnetics (CEM 2011)

作者： F.H. Pereira D.A.P. Correa W. M. da Silva S.I. Nabeta Industrial Engineering Post Graduation Program Nove de Julho University Sao Paulo Brazil Navy Technology Center in Sao Paulo CTMSP Sao Paulo Brazil Electrical Machine and Drivers Laboratory GMAcq/USP São Paulo University Sao Paulo Brazil

This work proposes an optimization procedure based on a bootstrapped neural network interpolation approach and the Genetic Algorithm method. The bootstrapped neural network is used to generate designed data sets in order to estimate a mapping from input to output space in an intrinsic experiment in a motor drive vibration study. The optimization procedure is aimed to minimize the motor vibration by adjusting some drive control parameters.

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Educational robotics as a learning aid for disabled children

Educational robotics as a learning aid for disabled children

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Biosignals and Biorobotics Conference (BRC), ISSNIP

作者： Carlos Valadão Teodiano Freire Bastos Magdo Bôrtole Victor Perim Daniel Celino Fauzi Rodor Agda Gonçalves Humberto Ferasoli Electrical Engineering Post-Graduation Program Universidade Federal do Espirito Santo Fernando Ferrari Av. 514 Vitória Brazil Universidade Estadual Paulista Av. Eng. Luiz Edmundo C. Coube 14-01 Bauru SP Brazil

Severe disabled children have little chance of environmental and social exploration and discovery, and due this lack of interaction and independency, it may lead to an idea that they are unable to do anything by themselves. This idea is called “learned helplessness” and is very negative for the child cognitive development and social development as well. With this entire situation it is very likely that the self-steam and mood of this child. Trying to help these children on this situation, educational robotics can offer and aid, once it can give them a certain degree of independency in exploration of environment. The system developed in this work allows the child to transmit the commands to a robot. Sensors placed on the child's body can obtain information from head movement or muscle pulses to command the robot to carry the tasks. Also, this system can be used with a variety of robots, being necessary just a previous configuration. It is expected that, with the usage of this system, the disabled children have a better cognitive development and social interaction, balancing in a certain way, the negative effects of their disabilities.

关键词： Robot sensing systems Manipulators Software Glass Computers

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Digital control system using a thermoelectric cell for temperature electronic devices testing

Digital control system using a thermoelectric cell for tempe...

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IEEE Latin American Symposium on Circuits and Systems (LASCAS)

作者： João P. Bazzo Jean C. C. Silva Emerson G. Carati Marcio Vogt Tiago Lukasievicz Electrical Engineering Post-Graduation Program Federal University of Technology- Paraná Pato Branco PR Brazil

This paper presents a temperature digital control system for performance evaluation of electronic devices under different operating temperatures. The system is based on a thermoelectric module of Peltier effect, which is used for heating or cooling the device under test (DUT). A digital PI controller is designed through simulations with an electric model of the structure, developed in Simulink ® . Based on the parameters and results from simulations, the controller is implemented in Labview ® and experimental results are obtained using a servo amplifier like actuator.

关键词： Testing Data acquisition Heating Heat transfer Hardware Heat sinks Actuators

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An energy based LQR tuning approach applied for Uninterruptible Power Supplies

An energy based LQR tuning approach applied for Uninterrupti...

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IEEE Latin American Symposium on Circuits and Systems (LASCAS)

作者： João Marcos Kanieski Emerson Giovani Carati Rafael Cardoso Electrical Engineering Post-Graduation Program Federal University of Technology - Paraná Pato Branco Paraná BR

This paper proposes a tuning method for a linear quadratic regulator (LQR) and its application to Uninterruptible Power Supplies (UPS). A performance index is established based on the desired behavior of system variables, such as maximum values permitted on the states and control law saturation. The tuning method is based on the Q and R weighting matrices, which relate the energy of the state variables involved on the process. From this index it is possible to find an optimal point to reach the required performance. The design procedure is exemplified with an output voltage control of an Uninterruptible Power Supply and dynamic results are presented.

关键词： Tuning Energy states Indexes Voltage control Bismuth

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Repetitive control techniques applied to uninterruptible power supplies

Repetitive control techniques applied to uninterruptible pow...

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IEEE/IAS International Conference on Industry Applications (INDUSCON)

作者： Claudio Lucas Gnoatto Alcir Scarmin Emerson Giovani Carati Electrical Engineering Post-Graduation Program (PPGEE) Federal University of Technology Parana Pato Branco Parana Brazil

This paper presents recent repetitive control (RP) techniques applied to uninterruptible power supplies (UPS). A proportional-derivative (PD) technique including a feedforward term is implemented as the main controller. In addition, recent repetitive control laws are presented and applied to a single phase PWM inverter. It is also presented a new RP approach for repetitive gain adaptation in the presence of cyclic and random disturbances. Results demonstrate the efficiency of each control approach.

关键词： Uninterruptible power systems Strontium Robustness Pulse width modulation Inverters Load modeling Transient response

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Wavelet-based algebraic multigrid method using the lifting technique

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Journal of Microwaves and Optoelectronics 2010年第1期9卷 1-9页

作者： Pereira, Fabio Henrique Nabeta, Silvio Ikuyo Industrial Engineering Post Graduation Program Uninove University - SP Brazil Electrical Machine and Drives Lab São Paulo University GMAcq/USP - SP Brazil

This paper presents a progress in the development of a recent and promising wavelet-based Algebraic Multigrid method. This new approach uses the lifting technique for creating an algorithm with smaller memory requirement and a reduced number of floating point operations, if long filters are used, keeping the efficiency of the multigrid technique, which is tested in the TEAM 28 Problem. The Incomplete Cholesky and Incomplete LU preconditioners are used for comparison. © 2010 SBMO/SBMag.

关键词： Discrete wavelet transforms

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An efficient two-level preconditioner based on lifting for FEM-BEM equations

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Journal of Microwaves and Optoelectronics 2010年第2期9卷 78-88页

作者： Pereira, Fabio Henrique Afonso, Marcio Matias De Vasconcelos, João Antônio Nabeta, Silvio Ikuyo Industrial Engineering Post Graduation Program UNINOVE University São Paulo Brazil Electrical Engineering Department Federal Technology Education Center CEFET Minas Gerais Brazil Electrical Engineering Department UFMG Minas Gerais Brazil Electrical Machine and Drives Lab São Paulo University GMAcq/USP São Paulo Brazil

The system resulting from the coupled Finite Element Method and Boundary Element Method formulations inherits all characteristics of both finite element and boundary element equation system, i. e., the system is partially sparse and symmetric and partially full and nonsymmetric. Consequently, to solve the resulting coupled equation system is not a trivial task. This paper proposes a new efficient lifting-based two level preconditioner for the coupled global system. The proposed approach is applied to solve the coupled systems resulting from the electromagnetic scattering problem and its performance is evaluated based on the number of iterations and the computational time. Traditional methods based on incomplete and complete LU decompositions are used for comparison. © 2010 SBMO/SBMag.

关键词： Boundary element method

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