Repositorio Universidad Pontificia Comillas: Envíos recientes
Mostrando ítems 2821-2840 de 65316
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Analysis of the chaotic regime for DC-DC converters under current-mode control
(Sin editorial (Baveno, Italia), 2002-08-06)This paper shows how to compute the voltage gain of a DC-DC converter operating under current-mode control in the chaotic regime using a state-density approach. Our approach invokes the fact that the chaotic sampled inductor ... -
Energy-saving automatic optimisation of train speed commands using direct search techniques
(Sin editorial (Berlín, Alemania), 1996-07-31)This paper describes two computer tools that have been developed for the automatic optimisation of train speed commands. Given a target time for the trip between two consecutive stations, energy consumption is minimised. ... -
SIRO: an optimal regulation system in an integrated control centre for metro lines
(Sin editorial (Berlín, Alemania), 1996-07-31)This paper describes the development of the system SIRO, an optimal regulation tool for metro lines. SIRO combines simulation, optimisation and hierarchical control techniques. The objectives of the system are (1) to improve ... -
Conditions for equivalence between the compositional rule of inference and the compatibility modification inference
(Sin editorial (Nueva Orleans, Estados Unidos de América), 2002-08-06)This paper shows that the compositional rule of inference reduces to the compatibility modification inference, when the antecedent of a fuzzy rule and its input fulfil some properties. Two main types of implications are ... -
Fall-out estimation by lagrangian random walk model
(Sin editorial (Madrid, España), 2007-12-04)The purpose of this paper is an estimation of the concentration of pollutants above the terrain surface based on a lagrangian random walk model. Firstly, an estimation of wind fields in a region of interest using the ... -
Reliability analysis of distribution systems considering sub-unavailabilities
(Sin editorial (Lisboa, Portugal), 1997-06-19)This paper presents a mathematical model that allows a comprehensive description of the restoration process by means of sub-repair times when an element of an electric distribution system fails. The model allows to simulate ... -
Firing conditions of fuzzy rules, generalised possibility and necessity measures
(Sin editorial (Barcelona, España), 2002-08-06)When inference is performed with the compositional rule of inference (CRI), fuzzy rules can be mathematically modelled by a pair of operators, the implication function and the modus ponens generating function, each pair ... -
Thermal properties of commercial thermoelectric modules
(Sin editorial (Dresde, Alemania), 2002-08-06)Thermoelectric semiconductors and the mass production of thermoelectric modules have experienced a big development in the last years, making thermoelectricity attractive for industrial and commercial applications. The ... -
A probability estimation based criterion for model evaluation
(Sin editorial (Lausana, Suiza), 1997-09-29)We develop a criterion based on the estimation of the joint probability density function (pdf) of the input and the error, and on the pdf of the input. It is made to decide when the couple inputmodel no longer fit together. ... -
Prediction of water chemical properties in the cycle of a coal power plant using artificial neural networks
(Sin editorial (Anchorage, Estados Unidos de América), 1998-05-09)Describes a systematic methodology based on artificial neural networks for model identification and its application to the prediction of water chemical properties under normal operation conditions in a power plant. The ... -
Loss-minimization control of synchronous machines with constant excitation
(Sin editorial (Fukuoka, Japón), 2002-08-06)No disponible Not available -
Efficient control of reluctance synchronous machines
(Sin editorial (Aquisgrán, Alemania), 2002-08-06)This paper shows that maximum efficiency control (ME) in reluctance synchronous machines (RSM) belongs to the class of constant angle control strategies. It is also shown that for all constant angle control strategies, ... -
Unified formulation for rotor-flux estimation in an induction motor
(Sin editorial (Aquisgrán, Alemania), 2002-08-06)This paper shows that any rotor flux estimator can be analysed, in steady state, combining two basic estimators: the current and the voltage models. This formulation can be used to investigate the internal structure and ... -
Control system for a UPFC in a transmission line
(Sin editorial (Aquisgrán, Alemania), 2002-08-06)This paper presents a detailed investigation of a UPFC control system. The dynamic model of the UPFC has been developed using the space-vector representation of the instantaneous three-phase variables using Park's ... -
Results of the implementation of an optimal control system in an integrated control centre for metro lines
(Sin editorial (Lisboa, Portugal), 1998-08-14)This paper presents the results of the implementation of an optimal control system for closed metro lines in an integrated control centre. The system has been successfully working for more than one year in metro lines of ... -
On a high-level model for the architectural evaluation of an MPEG-ATM ASIC
(Sin editorial (Madrid, España), 1998-11-20)No disponible -
Analysis and Control of Chaotic DC-DC Switching Power Converters
(Sin editorial (Orlando, Estados Unidos de América), 2002-08-06)In this paper we review our approach to computing the static characteristics-such as voltage gain and average switching frequency-of open loop DC-DC converters under current-mode control in the chaotic regime. Linearized ... -
On-line estimation of the stator parameters in an induction motor using only voltage and current measurements
(Sin editorial (Phoenix, Estados Unidos de América), 2002-08-06)This paper proposes a set of algorithms for stator parameter on-line estimation (stator resistance, stator inductance and leakage inductance) of a induction motor using neither the rotor speed nor the rotor resistance. The ... -
Model-based loss minimization for DC and AC vector controlled motors including core saturation
(Sin editorial (Phoenix, Estados Unidos de América), 2002-08-06)A generalised d-q loss model for electrical motors is presented in this paper. It is shown to be applicable to permanent magnet synchronous motors, reluctance synchronous motors, induction motors and DC motors. A model-based ...