Now showing items 1-20 of 233

  • Interior/exterior-point methods with inertia correction strategy for solving optimal reactive power flow problems with discrete variables

    Tófoli, Marielena Fonseca Autor UNESP; Soler, Edilaine Martins Autor UNESP; Balbo, Antonio Roberto Autor UNESP; Baptista, Edméa Cássia Autor UNESP; Nepomuceno, Leonardo Autor UNESP (Annals of Operations Research, 2018) [Artigo]
    Interior/exterior-point methods have been widely used for solving Optimal Reactive Power Flow problems (ORPF). However, the utilization of such methods becomes difficult when transformer taps and/or capacitor/reactor banks ...
  • A primal-dual interior/exterior point method, with combined directions and quadratic test in reactive optimal power flow problems

    Ramos De Souza, Rafael Autor UNESP; Roberto Balbo, Antonio Autor UNESP; Nepomuceno, Leonardo Autor UNESP; Cassia Baptista, Edmea Autor UNESP; Martins Soler, Edilaine Autor UNESP; Bento Nogueira Pinheiro, Ricardo Autor UNESP (IEEE Latin America Transactions, 2017) [Artigo]
    In this paper, we propose a primal-dual interior/ exterior point method that uses the modified logarithmic barrier function together with a quadratic test strategy and new search direction procedures for solving the reactive ...
  • Assessment of Macro Fiber Composite Sensors for Measurement of Acoustic Partial Discharge Signals in Power Transformers

    De Castro, Bruno Albuquerque Autor UNESP; De Melo Brunini, Danilo Autor UNESP; Baptista, Fabricio Guimaraes Autor UNESP; Andreoli, Andre Luiz Autor UNESP; Ulson, Jose Alfredo Covolan Autor UNESP (IEEE Sensors Journal, 2017) [Artigo]
    This paper presents a performance assessment of macro fiber composite (MFC) sensors for measuring acoustic emission (AE) signals from partial discharges (PD) in power transformers filled with mineral oil. MFC sensors are ...
  • A Modified Barrier and Barrier Method and the Optimal Power Flow Problem

    Delgado, Jessica Antonio Autor UNESP; Baptista, Edmea Cassia Autor UNESP; Bregadioli, Gabriela Fernanda Autor UNESP; Nepomuceno, Leonardo Autor UNESP; Balbo, Antonio Roberto Autor UNESP; Soler, Edilaine Martins Autor UNESP (IEEE Latin America Transactions, 2017) [Artigo]
    This work proposes an approach that uses a union of methods based on logarithmic barrier function and modified logarithmic barrier function for the resolution of the reactive optimal power flow problem. In this proposed ...
  • A logarithmic CMOS image sensor with wide output voltage swing range

    De Souza Campos, Fernando Autor UNESP; Da Silva, Marcelo Macchi; Bordon, Mario Eduardo Autor UNESP; Swart, Jacobus W. (2017 International Caribbean Conference on Devices, Circuits and Systems, ICCDCS 2017, 2017) [Trabalho apresentado em evento]
    This paper presents logarithmic CMOS image sensor with wide output voltage swing range. Wide output voltage swing range is achieved by increasing the number of transistors connected as diodes of logarithmic CMOS image ...
  • System diagnostics and monitoring applied in flaws of the structure systems in HPSs by using image processing

    Thomazella, Rogério Autor UNESP; Castanho, José Eduardo Cogo Autor UNESP; Franchin, Marcelo Nicoleti Autor UNESP; Algarve, Richard José Autor UNESP; Dotto, Fábio Romano Lofrano Autor UNESP; Fiocchi, Arthur Alves Autor UNESP; Fernandes, Valdir; Filho, Ítalo Tadeu Carvalho Freitas; Nunes, Mauricio (2015 18th International Conference on Intelligent System Application to Power Systems, ISAP 2015, 2015) [Trabalho apresentado em evento]
    The system proposed in this work makes use of an underwater operated vehicle to replace the divers in the inspection operation in Hydroelectric Power Station (HPS) equipped with high-resolution video cameras, able to get ...
  • Coevolutionary Genetic Algorithm Based on the Augmented Lagrangian Function for Solving the Economic Dispatch Problem

    Nepomuceno, Leonardo Autor UNESP; Cassia Baptista, Edmea Autor UNESP; Roberto Balbo, Antonio Autor UNESP; Martins Soler, Edilaine Autor UNESP (IEEE Latin America Transactions, 2015) [Artigo]
    This paper proposes a coevolutionary augmented Lagrangian method (AGCE) for solving the classic economic dispatch problem. This problem becomes non-convex and non-differentiable if valve-point loadings effects are considered ...
  • Portable system for monitoring and recording multivariate workplace environmental variables in hydroelectric power plants

    Andreoli, Andre Luiz Autor UNESP; Franchin, Marcelo Nicoletti Autor UNESP; Cagnon, Jose Angelo Autor UNESP (2014 11th IEEE/IAS International Conference on Industry Applications, IEEE INDUSCON 2014 - Electronic Proceedings, 2014) [Trabalho apresentado em evento]
    This paper presents research and development results of a prototype portable system designed for monitoring and recording HPP (Hydroelectric Power Plant) workplace environment data (noise, vibration, pressure, temperature, ...
  • A simplified approach for identification of parasitic capacitances in three-phase induction motor driven by PWM inverter

    Riehl, Rudolf Ribeiro Autor UNESP; Ulson, Jose Alfredo Covolan Autor UNESP; Andreoli, Andre Luiz Autor UNESP; Alves, Alceu Ferreira Autor UNESP (2014 17th International Conference on Electrical Machines and Systems, ICEMS 2014, 2015) [Trabalho apresentado em evento]
    The identification of parasitic capacitances of three-phase induction motor for studying electromagnetic interference (EMI) when it driven by PWM inverters are generally performed in laboratories by using LCR bridges. The ...
  • A new approach for teaching power electronics in electrical engineering courses

    Riehl, Rudolf Ribeiro Autor UNESP; Ulson, Jose Alfredo Covolan Autor UNESP; Andreoli, Andre Luiz Autor UNESP; Alves, Alceu Ferreira Autor UNESP (2014 17th International Conference on Electrical Machines and Systems, ICEMS 2014, 2015) [Trabalho apresentado em evento]
    This work presents a new approach for teaching activities at the Laboratory of Power Electronics, at the Undergraduate Electrical Engineering course of the Faculty of Engineering Bauru (UNESP). The proposal is to develop ...
  • Application of the auxiliary wheel cleaning jet in the plunge cylindrical grinding with Minimum Quantity Lubrication technique under various flow rates

    Bianchi, Eduardo C; Rodriguez, Rafael L; Hildebrandt, Rodolfo A; Lopes, José C; de Mello, Hamilton J; de Aguiar, Paulo R; da Silva, Rosemar B; Jackson, Mark J (Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture, 2018) [Artigo]
    Minimum Quantity Lubrication is an alternative technique to conventional techniques that are related to environmental sustainability and economic benefits. This technique promotes the substantial reduction of the amount ...
  • Control of three-phase PWM boost rectifiers using proportional-resonant controllers

    Rocha, Marco Auralio Autor UNESP; De Souza, Wallace Gabriel Autor UNESP; Serni, Paulo Jose Amaral Autor UNESP; Andreoli, Andre Luiz Autor UNESP; Clerice, Gulherme Augusto Marabezzi Autor UNESP; Da Silva, Paulo Sergio Autor UNESP (SBSE 2018 - 7th Brazilian Electrical Systems Symposium, 2018) [Trabalho apresentado em evento]
    Voltage-oriented vector control (VOC) using proportional-integral controllers is an attractive control method for three-phase PWM rectifiers, due to relative ease of implementation, being one of the most used methods. ...
  • Electromechanical impedance (EMI) technique as alternative to monitor workpiece surface damages after the grinding operation

    Batista da Silva, Rosemar; Ferreira, Fabio Isaac Autor UNESP; Baptista, Fabrício Guimares Autor UNESP; de Aguiar, Paulo Roberto Autor UNESP; de Souza Ruzzi, Rodrigo; Hubner, Henrique Butzlaff; da Penha Cindra Fonseca, Maria; Bianchi, Eduardo Carlos Autor UNESP (International Journal of Advanced Manufacturing Technology, 2018) [Artigo]
    Electromechanical impedance (EMI) technique has been employed in detection of structural failure in civil and mechanical structures because of its non-destructive property and easy implementation of small and inexpensive ...
  • A Comparative Study of Impedance Measurement Techniques for Structural Health Monitoring Applications

    Budoya, Danilo Ecidir Autor UNESP; Baptista, Fabricio Guimarães Autor UNESP (IEEE Transactions on Instrumentation and Measurement, 2018) [Artigo]
    Structural health monitoring (SHM) systems are scientifically and economically relevant as methods of detecting structural damage to various types of structures, thus increasing safety and reducing maintenance costs. Among ...
  • Avaliação do diafragma piezelétrico de baixo custo no monitoramento do processo de retificação plana tangencial

    Fabiano, Luiz Felipe Gilli Autor UNESP; Ribeiro, Danilo Marcus Santos Autor UNESP; Junior, Pedro Oliveira Conceição Autor UNESP; da Silva, Kauê Luís Oliveira Autor UNESP; de Aguiar, Paulo Roberto Autor UNESP; Bianchi, Eduardo Carlos Autor UNESP (Revista Materia, 2017) [Artigo]
    The machining processes are of extreme importance for the manufacture of mechanical parts, the parts demand high dimensional and geometric precision and quality in its construction. Among the machining processes, the ...
  • Spectra Measurements Using Piezoelectric Diaphragms to Detect Burn in Grinding Process

    Ribeiro, Danilo M. S. Autor UNESP; Aguiar, Paulo R. Autor UNESP; Fabiano, Luiz F. G. Autor UNESP; D'Addona, Doriana M. Autor UNESP; Baptista, Fabricio Guimaraes; Bianchi, Eduardo C. Autor UNESP (IEEE Transactions on Instrumentation and Measurement, 2017) [Artigo]
    Researchers have evaluated a great number of monitoring techniques in order to control the surface condition of ground parts. Piezoelectric diaphragms of lead zirconate titanate are used in many fields, but these sensors ...
  • Equivalent Circuit of Piezoelectric Diaphragms for Impedance-Based Structural Health Monitoring Applications

    De Freitas, Everaldo S. Autor UNESP; Baptista, Fabricio G. Autor UNESP; Budoya, Danilo E. Autor UNESP; De Castro, Bruno A. Autor UNESP (IEEE Sensors Journal, 2017) [Artigo]
    Piezoelectric diaphragms are low-cost acoustic components commonly used in a wide variety of electronic devices, where the typical function is to generate an audible alarm. However, scientific study concerning the use of ...
  • Analysis of Sensor Installation Methods in Impedance-based SHM Applications

    Da Silveira, Ricardo Z.M. Autor UNESP; Campeiro, Leandro M. Autor UNESP; Baptista, Fabricio G. Autor UNESP (Procedia Engineering, 2016) [Trabalho apresentado em evento]
    In recent years, piezoelectric sensors have been used in many non-destructive methods for detection of structural damage in structural health monitoring (SHM) systems, including the electromechanical impedance (EMI) ...
  • The correlation of vibration signal features in grinding of advanced ceramics

    Conceicao, Pedro Oliveira Autor UNESP; Marchi, Marcelo Autor UNESP; Aguiar, Paulo Roberto Autor UNESP; Bianchi, Eduardo Carlos Autor UNESP; Franca, Thiago Valle Autor UNESP (IEEE Latin America Transactions, 2016) [Artigo]
    Monitoring the grinding of ceramics using the vibration signal has been presented as an alternative for the diagnosis of the workpiece surface. This paper has the objective of studying the vibration signal through spectral ...
  • Estimação espectral do sinal de vibração para o monitoramento do desgaste do dressador de ponta única

    Conceição Junior, Pedro de Oliveira Autor UNESP; Marchi, Marcelo Autor UNESP; Martins, Cesar Henrique Rossinoli Autor UNESP; D’Addona, Doriana; de Aguiar, Paulo Roberto Autor UNESP; Bianchi, Eduardo Carlos Autor UNESP (Revista Materia, 2016) [Artigo]
    The use of dressers worn can provide a less aggressive to the grinding wheels, causing an increase in cutting forces and a more rapid loss of grinding grain consequently compromise the final quality of the workpiece to be ...