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2005 International Conference on Industrial Electronics and Control Applications

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Displaying Results 1 - 25 of 54
  • Application of a discontinuous controller with chattering attenuation to unicycle mobile robots

    Publication Year: 2005, Page(s):5 pp. - 5
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1156 KB) | HTML iconHTML

    We developed a discontinuous controller to stabilize the movement of a unicycle mobile robot around a desired trajectory via backstepping methodology. The main contribution of the paper is that chattering signal, produced by the imprecision of the discontinuous terms, vanished thanks to an adaptive gain that reduces the chattering level once the position errors were zero. A stability analysis of t... View full abstract»

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  • Mathematical model of a levitation system based on eddy currents

    Publication Year: 2005, Page(s):5 pp. - 5
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3385 KB) | HTML iconHTML

    This paper contains a synthesis to model an electromagnetic levitation system using a direct evaluation method of electromagnetic and electromotive forces, taking the Maxwell equations that relate electric and magnetic fields. The aim of this work is to contribute to researches focused on developing and optimising mechanisms to provide solutions for applications where mechanical friction must be r... View full abstract»

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  • Application of direct controls to variable-speed wind generators

    Publication Year: 2005, Page(s):6 pp. - 6
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5675 KB) | HTML iconHTML

    The well-known principle of the direct torque control applied mainly to squirrel-cage induction motor drives can be generalized and applied to other machines, quantities, converters and systems. These are: other AC machines (double-fed induction and permanent magnet synchronous machine), active and reactive power, direct power control of the line side converter, direct controls of both of the conv... View full abstract»

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  • Hybrid second-order sliding-mode tracking control for Acrobot

    Publication Year: 2005, Page(s):6 pp. - 6
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2810 KB) | HTML iconHTML

    In this paper we propose a variable structure controller to solve the tracking control problem of Acrobot. The controller consists of a swing-up phase and a stabilization phase. The desired trajectory is centered at the upright position, while the Acrobot starts from the stable position. A stability analysis of the closed-loop dynamic system in question was performed within the framework of Lyapun... View full abstract»

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  • A new algorithm based on rSQP and AD

    Publication Year: 2005, Page(s):5 pp. - 5
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (437 KB) | HTML iconHTML

    An efficient optimization algorithm based on reduced sequential quadratic programming (rSQP) and automatic differentiation (AD) is presented in this paper. With the characteristics of sparseness, relatively low degrees of freedom and equality constraints utilized, the nonlinear programming problem was solved by improved rSQP solver. In the solving process, AD technology was used to obtain accurate... View full abstract»

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  • Real-time reconfigurable micro-system based on FPGA and CPLD for dual-mode PID control through backpropagation neural network

    Publication Year: 2005, Page(s):5 pp. - 5
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2567 KB) | HTML iconHTML

    In this paper, a practically usable dual-mode control micro-system based on CPLD and reconfigurable FPGA is described. FPGA can be dynamically reconfigured under the control of CPLD to implement two models, backpropagation neural network model and its training model, both of which are respectively directed to two control modes for industrial produce. One mode is neural network performed automatic ... View full abstract»

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  • Virtual tools for remote analysis and simulation

    Publication Year: 2005, Page(s):6 pp. - 6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (6552 KB) | HTML iconHTML

    This document describes a general structure for the implementation of virtual tools for remote calculation through Internet. Two virtual tools for mathematical analysis (Analys) and simulation of dynamic systems (SimWeb), supported by the Matlabcopy, are described. These virtual tools, permit access to the Matlab from multiple work stations, without distance, power computer restrictions or user's ... View full abstract»

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  • Adaptive control using multiple models switching and tuning

    Publication Year: 2005, Page(s):8 pp. - 8
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4772 KB) | HTML iconHTML

    The purpose of this paper is to marry the two concepts of multiple model adaptive control and safe adaptive control. In its simplest form, multiple model adaptive control involves a supervisory switching among one of a finite number of controllers as more is learnt about the plant, until one of the controllers is finally selected and remains unchanged. Safe adaptive control is concerned with ensur... View full abstract»

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  • Module-oriented automatic differentiation in nonlinear control

    Publication Year: 2005, Page(s):5 pp. - 5
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (436 KB) | HTML iconHTML

    In this paper, a module-oriented automatic differentiation (MAD) approach is presented based on traditional automatic differentiation algorithms. This approach can well exploit the sparsity of the model by partitioning it into a series of sequential modules and choosing the best differentiation algorithm for each module accordingly. Numerical results show that for nonlinear system, module-oriented... View full abstract»

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  • Fractional hold circuits for the design of positive realness discrete transfer functions

    Publication Year: 2005, Page(s):3 pp. - 3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (733 KB) | HTML iconHTML

    The appropriate use of fractional order holds (beta - FROH) of correcting gains beta isin [-1,1 ] as an alternative to the classical zero and first order-holds (respectively, ZOH, FOH) is discussed related to the positive realness of the associate discrete transfer functions obtained from a given continuous transfer function. It is proved that the minimum direct input-output gain (i.e. the quotien... View full abstract»

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  • A maglev system: modeling and controller design

    Publication Year: 2005, Page(s):6 pp. - 6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2387 KB) | HTML iconHTML

    In this paper, the nonlinear mathematical model with five DOFs (degrees-of-freedom) of a magnetic levitation system is developed and analyzed. Then a second order sliding mode controller is proposed to regulate the levitation to a desired position, stabilize the other 4 DOFs in the nonlinear system and compensate the unknown increments on the load. Simulation results are presented to show the effe... View full abstract»

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  • A new model for induction motor with induced saliencies

    Publication Year: 2005, Page(s):6 pp. - 6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4665 KB) | HTML iconHTML

    This paper develops a formal and general model for an induction motor with periodic variations of the rotor slot; this induction motor with induced saliencies is commonly used in sensorless control applications. In order to obtain the model, first the analysis of the stator and rotor inductances modified by induced saliencies is carried out; second, the electromagnetic and electromechanical equati... View full abstract»

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  • A methodology for excitation systems identification

    Publication Year: 2005, Page(s):6 pp. - 6
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4413 KB) | HTML iconHTML

    In this paper a methodology for parameter identification of the IEEE standard 421.5 (1992) excitation systems models is presented. The methodology applies parametric identification techniques to the linear dynamics of voltage regulator models. A pseudorandom binary sequence small signal is used in an offline generator test, that allows a reduction in the equipment test time, in comparison with ste... View full abstract»

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  • Dynamic performance of an excitation system built in a digital way

    Publication Year: 2005, Page(s):6 pp. - 6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2919 KB) | HTML iconHTML

    This paper presents the results obtained in the performance of a digital excitation system designed with digital signal processor (DSP). The modeling of the plant, the structure of the synchronous generator terminal voltage control and the models of limiters were developed as routines or programmed algorithms in the DSP View full abstract»

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  • Adaptive fuzzy decentralized control of robot manipulators

    Publication Year: 2005, Page(s):6 pp. - 6
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3358 KB) | HTML iconHTML

    In this paper an adaptive fuzzy decentralized control algorithm for trajectory tracking of robot manipulators is developed. The proposed decentralized control algorithm allows the overall closed-loop system to be stabilized while making the tracking error to be uniformly ultimately bounded (UUB), without having any prior knowledge of the robot manipulator dynamics. The interconnections in the dyna... View full abstract»

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  • The design and implementation of a general reduced TCP/IP protocol stack for embedded Web server

    Publication Year: 2005, Page(s):5 pp. - 5
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1793 KB) | HTML iconHTML

    The embedded Web server technology is the combination of embedded device and Internet technology, which provides a flexible remote device monitoring and management function based on Internet browser and it has become an advanced development trend of embedded technology. In this paper, a design and implementation scheme of a general reduced Web server protocol stack which aims at the limited resour... View full abstract»

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  • Nonlinear dynamics of an electromagnetic suspension/levitation system

    Publication Year: 2005, Page(s):7 pp. - 7
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5125 KB) | HTML iconHTML

    This paper presents a mathematical model and the performance evaluation of a kind of electromagnetic levitation/suspension system, where the static and dynamic magnetic fields are linked through conductor bodies. The complex and nonlinear dynamic of the system, allows it to illustrate in a practical form, different aspects of automatic control like mathematical modelling, nonlinear analysis, simul... View full abstract»

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  • Identification of nonlinear dynamic systems by combining equilibrium and off-equilibrium information

    Publication Year: 2005, Page(s):6 pp. - 6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1550 KB) | HTML iconHTML

    An identification methodology for nonlinear dynamic systems using Gaussian process prior models is presented. It combines equilibrium and off-equilibrium information. The advantages of so doing are highlighted View full abstract»

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  • A lossless compression method of medical images based on the local texture feature

    Publication Year: 2005, Page(s):4 pp. - 4
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3316 KB) | HTML iconHTML

    As for a kind of medical images with clear texture feature, a new lossless compressive method is presented in this paper. With two main steps, the method firstly sets up the predictive model of the current pixel with its surrounding texture features, including its four color change gradients; and then measures the similarity of all pixels within the image with their predictive models so that the r... View full abstract»

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  • Sliding mode control with linear matrix inequalities using only output information

    Publication Year: 2005, Page(s):6 pp. - 6
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2768 KB) | HTML iconHTML

    This paper presents a sliding mode control using only output information. The robustness conditions come from a linear matrix inequality (LMI). This LMI permits to use output feedback to stabilize the system with matched and unmatched disturbances and uncertainties. The controller synthesized consists of two components. One component of linear output feedback regulates the system and rejects the u... View full abstract»

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  • Applications of embedded controllers in speed and position controls

    Publication Year: 2005, Page(s):6 pp. - 6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3877 KB) | HTML iconHTML

    This tutorial paper presents the experimental results of solving speed and position control problems by using embedded controllers. The embedded controllers used proportional, integral, and derivative controls. A feature of these controllers is that the sample time is not explicitly included in the integral and derivative control equations. This feature was experimentally tested. In the testing of... View full abstract»

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  • A framework for implementing intelligence in embedded controls

    Publication Year: 2005, Page(s):6 pp. - 6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3327 KB) | HTML iconHTML

    This paper presents a framework for the realization of intelligent embedded systems for control applications. Requirements on system intelligence are translated into requirements on the system hardware and software. The hardware and software components of the design and their impact on system performance are discussed. Software and hardware architectures are presented that enable the realization o... View full abstract»

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  • Sliding mode control strategy of dynamic voltage restorer

    Publication Year: 2005, Page(s):3 pp. - 3
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (245 KB) | HTML iconHTML

    The dynamic voltage restorer (DVR) is great significance for improving power quality as a cost effective solution for the protection of sensitive loads from voltage sags. This paper summarizes sliding mode control (SMC) method used in current control strategies for DVR including forward-feed control and PI feedback control. After this paper, it presents SMC for DVR including the design of switch f... View full abstract»

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  • Modeling and simulation of a vector-controlled synchronous machine in motoring and generating mode

    Publication Year: 2005, Page(s):6 pp. - 6
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (686 KB) | HTML iconHTML

    A vector-controlled permanent-magnet (PM) synchronous machine has been modeled and simulated in both the motoring and generating mode of operation. The control provides for the maximized torque and, therefore, maximum efficiency during motoring, and for a controlled power, tight voltage regulation in the presence of load changes, and minimum bus voltage ripple at the output of an ac-dc converter d... View full abstract»

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  • State estimation of the vinyl acetate reactor using unscented Kalman filters (UKF)

    Publication Year: 2005, Page(s):4 pp. - 4
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3043 KB) | HTML iconHTML

    The main objective of our research is to develop several unscented transform techniques (UTT) to estimate the state of the nonlinear processes such as an improvement of an extended Kalman filter (EKF) approach. The extended Kalman filter (EKF) has become a standard nonlinear estimation technique in control systems and parameter estimation for nonlinear system identification. The unscented Kalman f... View full abstract»

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