Căutare Annals of the University "Dunarea de Jos" of Galati. Fascicle III: Electrotechnics, Electronics, Automation Control and Informatics după Titlu

Afișează articolele 159-178 of 230

    • Optimal Control Development System for Electrical Drives 

      Găiceanu, Marian; Roşu, Emil; Păduraru, Romeo; Dache, Cristinel ("Dunarea de Jos" University of Galati, 2008)
      In this paper the optimal electrical drive development system is presented. It consists of both electrical drive types: DC and AC. In order to implement the optimal control for AC drive system an Altivar 71 inverter, a ...

    • The Optimal Control for D.C. Position Drive System 

      Munteanu, Traian ("Dunarea de Jos" University of Galati, 2007)
      A position drive system with D.C. motor is operated using conventional position, speed and current controls. These controls provide a good dynamic and steady-state behaviour, but they do not take in consideration the ...

    • Optimal Control for Electric Vehicle Stabilization 

      Găiceanu, Marian; Voncilă, Elena; Bihosu, Răzvan ("Dunarea de Jos" University of Galati, 2010)
      This main objective of the paper is to stabilize an electric vehicle in optimal manner to a step lane change maneuver. To define the mathematical model of the vehicle, the rigid body moving on a plane is taken into ...

    • Optimal Control Structure for Variable Speed wind Power System 

      Cutululis, Nicolaos Antonio; Munteanu, Iulian; Ceangă, Emil; Culea, Mihai ("Dunarea de Jos" University of Galati, 2002)
      This paper presents an optimal control structure for variable speed, fixed pitch wind turbine. The control objective results from the optimization criterion that includes two contradictory demands: maximization of the ...

    • Optimal Control Using Evolutionary Algorithms 

      Mînzu, Viorel (2017)
      Optimal Control Problems involve dynamic systems that are subject to algebraic or differential constraints and whose evolution may be characterized by a performance index. Such a problem can be solved by the well known ...

    • Optimal Convex Controller and Model Reduction for a Dynamic System 

      Khuntia, P. S; Mitra, Debjani ("Dunarea de Jos" University of Galati, 2008)
      This paper presents analysis and design of a family of controllers based on numerical convex optimization for an aircraft pitch control system. A design method is proposed here to solve control system design problems in ...

    • The Parametric Identification of a Stationary Process 

      Belea, Radu; Solea, Răzvan ("Dunarea de Jos" University of Galati, 2003)
      In the problems of identification it is supposed that the process has at least one measurable input size and at least one measurable output size. The identification of a process has three stages: the obtaining of a ...

    • Pedagogical Knowledge Model Based on Conceptual Graphs and Ontology 

      Ştefănescu, Diana; Pecheanu, Emilia; Cocu, Adina ("Dunarea de Jos" University of Galati, 2005)
      Intelligent educational systems are knowledge-based systems (KBS) they can be developed by a generic knowledge-based system development methodology. In this paper, we present an ontology-based approach for formalizing ...

    • Performance Comparison of Sliding Mode Controller and Conventional Pid Controller for DC Motor 

      Solea, Răzvan; Găiceanu, Marian; Eni, Cristian; Codreş, Bogdan ("Dunarea de Jos" University of Galati, 2013)
      This paper is concerned with the performance comparison of Sliding Mode Controller and conventional PID Controller for the control of DC Motor. The DC motor can be modeled as a linear time invariant single input single ...

    • The Phase Spectra Based Feature for Robust Speech Recognition 

      Ali, Abbasian; Hosslen, Marvi ("Dunarea de Jos" University of Galati, 2009)
      Speech recognition in adverse environment is one of the major issue in automatic speech recognition nowadays. While most current speech recognition system show to be highly efficient for ideal environment but their ...

    • Pid Self-Tuning Controllers Used in Different Structures of the Control Loops 

      Dugan, Viorel; Dan, Adrian; Ionescu, Clara; Cotrumba, Mirela ("Dunarea de Jos" University of Galati, 2008)
      The paper investigates the behavior of digital PID self-tuning controllers (STC) in different structures of the control loops used in adaptive systems. In the two phases of this type of systems which use a STC-PID, the ...

    • Pill Model for Grid Voltage Reference Reconstruction 

      Epure, Silviu; Belea, Radu ("Dunarea de Jos" University of Galati, 2012)
      In power electronics area, the PLL (Phase Lock Loop) circuit is needed to reconstruct the sinusoidal reference signal used on the APF (active power filters) or grid-tied inverters, starting from the distorted grid voltage. ...

    • Possibilistic Networks for Uncertainy Knowledge Processing in Student Diagnosis 

      Cocu, Adina ("Dunarea de Jos" University of Galati, 2006)
      In this paper, a possibilistic network implementation for uncertain knowledge modeling of the diagnostic process is proposed as a means to achieve student diagnosis in intelligent tutoring system. This approach is proposed ...

    • Power Conditioning System Topology For Grid Integration of Wind and Fuel Cell Energy 

      Găiceanu, Marian ("Dunarea de Jos" University of Galati, 2006)
      This paper shows the topology of the hybrid grid-connected power system and the performances of the front-end three-phase power inverter. The renewable sources of the hybrid power system consist of a solid oxide fuel cell ...

    • Power Estimation of Pipeline FFT Processors 

      Talebiyan, S. Reza; Hosseini-Khayat, Saied ("Dunarea de Jos" University of Galati, 2009)
      Pipeline FFT processors are used in mobile communication systems and in particular in OFDM-based systems. This paper presents a method for power analysis of pipeline FFT processors. This method applies to various ...

    • Power Quality Improvement in Fourteen Bus System Using Unified Power Flow Controller 

      Kannan, P.; Chenthur Pandian, S. ("Dunarea de Jos" University of Galati, 2011)

    • Practical implementation of Embedded Controlled Boost Converter for Solar Installation System 

      Kalirasu, A.; Dash, S.S. ("Dunarea de Jos" University of Galati, 2010)
      The solar photovoltaic power has received great attention and experienced impressive progress in the countries all over the world in recent years because of more and more serious energy crisis and environmental pollution. ...

    • Properties Of Potential Function- Based Clustering Algorithms 

      Nicolau, Viorel; Puşcaşu, Gheorghe; Popa, Rustem ("Dunarea de Jos" University of Galati, 2000)
      The clustering algorithms based on potential functions are capable of clustering a set of data, making no implicit assumptions on the cluster shapes and without knowing in advance the number of clusters. They are ...

    • Proton Exchange Membrane Fuel Cell Modelling Using Moving Least Squares Technique 

      Tîrnovan, R.; Giurgea, S.; Miraoui, A. ("Dunarea de Jos", 2009)
      Proton exchange membrane fuel cell, with low polluting emissions, is a great alternative to replace the traditional electrical power sources for automotive applications or for small stationary consumers. This paper ...

    • A Quick Survey of Text Categorization Algorithms 

      Munteanu, Dan ("Dunarea de Jos" University of Galati, 2007)
      this paper contains an overview of basic formulations and approaches to text classification. This paper surveys the algorithms used in text categorization: handcrafted rules, decision trees, decision rules, on-line learning, ...