GARCÍA FRANQUELO , Leopoldo

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Fuzzy-logic based controllers have been recently proposed to implement vector control methods in induction motors. This paper presents a new switching self-tuning type of fuzzy controller aimed at obtaining a satisfactory performance (rise time and overshoot) in the motor response. Two fuzzy controllers, a PI-like fuzzy controller and a PD-like...

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Three heuristic algorithms for solving a cluster problem associated with the tearing of a symmetric matrix are presented. Based on these partitioning procedures, a method for the parallel solution of the fast decoupled load flow has been developed, although it is also suitable for the parallel solution of any linear equations...

This paper presents a new node ordering algorithm to enhance sparse vector methods. The proposed technique locally minimizes the number of non-zero elements of the inverse of the table of factors. It uses the cardinality of the set of nodes which precede each node in the path graph as a tie-break criterion in the minimum degree ...

Recently, more attention has been devoted to sparse vector methods in order to reduce the computational burden when solving sparse systems of linear equations. These methods exploit the sparsity of the independent vector and/or the desire to know only a subset of the unknown vector. They are also applicable when refactorization of a slightly...

En este artículo se presenta la realización de controladores clásicos basados en el procesamiento lógico estocástico. Se aporta una descripción de las operaciones aritméticas básicas -suma, resta, multiplicación e integración. EI objetivo de esta arquitectura es proporcionar un conjunto de circuitos simples que permitan realizar estas...

En este documento se presenta un libro electrónico interactivo realizado en el Departamento de Ingeniería Electrónica de la Escuela Superior de Ingenieros de Sevilla. El material didáctico servirá de complemento a las tradicionales lecciones magistrales asociadas a la asignatura "Complemento de Sistemas Electrónicos Digitales", obligatoria de...

En este documento se presenta un laboratorio virtual de Procesadores Digitales de Señal (DSPs) realizado en el Departamento de Ingeniería Electrónica de la Escuela Superior de Ingenieros de Sevilla. El material didáctico se empleará en las clases prácticas de la asignatura "Complemento de Sistemas Electrónicos Digitales", de tercer curso de...

This paper deals with the problem of real time simulation of processes with boolean inputs and outputs. A language for this purpose and the programs that processes it is presented. The language allows the description of processes with simultaneous evolutions as a timed petri net type of description is used. Random failures can also be...

This paper reviews briefly the current scenarios where power electronics converters are being applied. In the paper, the main focus moves towards the high power applications, reviewing the different alternatives and topologies. The multilevel approach is studied in more depth, showing that is a good solution to the challenges that medium...

The industrial electronics market is continuously changing following the users demand. This paper introduces the current industrial electronics applications and is focused in the medium-voltage high-power ones. The multilevel approach is the most attractive solution to achieve the challenges that medium voltage-high power applications arise....

The paper presents a new control scheme for voltage control of voltage source inverter (VSI) with LC output filter. Proposed high performance control scheme with use of stationary regulators can be used in UPS or standalone power generation where sine wave output voltage is to be maintained. The proposed controller is able to compensate voltage...

This paper presents a new technique for programming SC circuits using a single time-multiplexed capacitor bank, achieving a significant reduction in capacitance area. Simulation results of a programmable biquad low pass filter show the validity of the proposed method.

A Model Predictive Control scheme is used for voltage control in a three-phase inverter with output LC filter. The controller uses a model of the system to calculate predictions of the future value of the system variables for a given voltage vector sequence. A cost function considering the voltage errors is defined and the voltage vectors that...

Among the different pulse codification techniques, stochastic pulse codification has its own arithmetic based on the similarity between Boolean algebra and statistical algebra. Summation and multiplication are the two basic arithmetic operations treated in depth in the literature. In this paper we present two digital stochastic circuits that...

Different non-regulated symmetrical power supplies for audio power amplifier are presented in this work, where the conducted interference to the ac power grid, measured by a LISN, has been suppressed to the minimum. EMI measurements in different topologies have been compared in this paper. Also, several conventional EMI suppression components...

En la válvula participan tres obleas (1), (2) y (3), la oblea intermedia (2) afectada por un profundo rebaje (4) que determina en la misma una membrana u obturador (5) de reducido espesor y consecuentemente deformable, que queda enfrentado al orificio (10

En este artículo se presenta la realización de una Red Nueronal Estocástica de Hopfield (SHNN) con un gran número de unidades. Originalmente, la SHNN propuesta por van de Bout, requiere tiempos de convergencia grandes al acumularse en el Estado neuronal los pulsos estocáticos que codifican las sinapsis secuenciamente. En otras realizaciones...