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IEEE International Symposium on Industrial Electronics 2005, ISIE 2005

作者： Guerrero, Josep M. Matas, José De Vicuña, Luis García Berbel, Néstor Sosa, Jorge Sustainable Distributed Generation Systems and Renewable Energy Group Escola Universitària d'Enginyeria Tècnica Industrial de Barcelona Comte d'Urgell 187 08036 - Barcelona Spain Department of Automatic Control and Computer Engineering Universitat Politècnica de Catalunya Department of Electronic Engineering Universitat Politècnica de Catalunya Spain Laboratorio de Instrumentación Científica Universidad de Los Andes Mérida Venezuela

ISBN: (纸本)0780387384

In this paper, a method for the parallel operation of inverters in an ac-distributed system is proposed. The paper explores the control of active and reactive power flow through the analysis of the output impedance of the inverters and its impact on the power sharing. As a result, adaptive virtual output impedance is proposed in order to achieve a proper reactive power sharing regardless of the line impedance unbalances. A soft-start operation is also included, avoiding the initial current peak, which results in a seamless hot-swap operation. Active power sharing is achieved by adjusting the frequency in load transient situations only, thanks to which the proposed method obtains constant steady-state frequency and amplitude. As opposed to the conventional droop method, the transient response can be modified by acting on the main control parameters. Linear and nonlinear loads can be properly shared due to the addition of a current harmonic loop in the control strategy. Experimental results are presented from a two 6-kVA parallel-connected inverters system, showing the feasibility of the proposed approach. © 2005 IEEE.

关键词： Electric inverters

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Steady-state invariant frequency and amplitude droop control using adaptive output impedance for parallel-connected UPS inverters

Steady-state invariant frequency and amplitude droop control...

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Annual IEEE Conference on Applied Power Electronics Conference and Exposition (APEC)

作者： J.M. Guerrero L.G. de Vicuna J. Matas J. Miret J. Cruz Department of Automatic Control Systems and Computer Engineering Sustainable Distributed Generation Systems and Renewable Energy Group Escola Universitària d'Enginyeria Tècnica Industrial de Barcelona Barcelona Spain Department of Electronic Engineering Universitat Politecnica de Catalunya Spain Department of Electronic Engineering Vilanova i la Geltrú Sustainable Distributed Generation Systems and Renewable Energy Group Escola Universitària d'Enginyeria Tècnica Industrial de Barcelona Barcelona

In this paper, a novel wireless load-sharing controller for parallel connected UPS inverters is proposed. As opposed to the conventional droop method, the proposed method achieves stable steady-state frequency and amplitude. The paper explorers the output impedance of the UPS inverters, and adaptive virtual output impedance is proposed in order to reduce its line impedance impact. Experimental results are presented from two 6 kVA UPS inverters controlled by TMS320LF2407A DSP boards, showing the feasibility of the proposed approach

关键词： Steady-state Frequency Programmable control Adaptive control Impedance Uninterruptible power systems Inverters Reactive power control systems Power engineering and energy

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Simple feedback linearizing controller to reduce audiosusceptibility and load disturbance in the full-bridge current doubler synchronous rectifier

Conference Proceedings - IEEE Applied Power Electronics Conf...

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Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC 2005年 2卷 689-694页

作者： Guerrero, Josep M. García De Vicuña, Luis Berbel, Nestor Sosa, Jorge Castilla, Miguel Sustainable Distributed Generation Systems and Renewable Energy Group Escola Universitària d'Enginyeria Tècnica Industrial de Barcelona C/Comte d'Urgell 187. 08036 - Barcelona Spain Department of Automatic Control Systems and Computer Engineering Department of Electronic Engineering Universitat Politècnica de Catalunya Spain Departamento: Laboratorio de Instrumentación Científica Universidad de Los Andes Mérida Venezuela

ISBN: (纸本)0780389751

The full-bridge converter with current-doubter synchronous rectifier (FB-CDSR) is a promising topology to implement low-voltage high-current power supplies. This paper proposes a novel control for this converter, which provides the following features: fast transient response, fixed switching frequency, and high robustness against large-signal disturbances in the input-voltage and the load-current. Furthermore, this controller avoids the use of any current sensor and can be implemented by means of cheap analog circuits, which highlights its low-cost and simplicity. The parallel operation of several HB-CDSR is also discussed Finally, experimental results are provided in order to show the validity of the proposed control technique. ©2005 IEEE.

关键词： Electric rectifiers

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Wireless-control strategy for parallel operation of distributed generation inverters

Wireless-control strategy for parallel operation of distribu...

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IEEE International Symposium on Industrial Electronics (ISIE)

作者： J.M. Guerrero J. Matas L.G. de Vicuna N. Berbel J. Sosa Department of Automatic Control and Computer Engineering Universitat Poliltècnica de Catalunya Spain Sustainable Distributed Generation Systems and Renewable Energy Group Escola Universitària d'Enginyeria Tècnica Industrial de Barcelona Barcelona Spain Department of Electronic Engineering Universitat Poliltècnica de Catalunya Spain Laboratorio de Instrumentación Científica Universidad de Los Andes Merida Venezuela

关键词： Distributed control Inverters Voltage control Power harmonic filters Impedance Frequency Power engineering and energy Reactive power control Reactive power Communication system control

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On-line multiobjective automatic control system generation by evolutionary algorithms

On-line multiobjective automatic control system generation b...

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2004 IEEE International Symposium on Industrial Electronics, IEEE-ISlE

作者： Stewart, P. Stone, D.A. Fleming, P.J. Electrical Machines and Drives Research Group Department of Electronic and Electrical Engineering University of Sheffield United Kingdom Department of Automatic Control and Systems Engineering University of Sheffield Sheffield United Kingdom

Evolutionary algorithms are applied to the online generation of servo-motor control systems. In this paper, the evolving population of controllers is evaluated at run-time via hardware in the loop, rather than on a simulated model. Disturbances are also introduced at run-time in order to produce robust performance. Multiobjective optimisation of both PI and Fuzzy Logic controllers is considered. Finally an on-line implementation of Genetic Programming is presented based around the Simulink standard blockset. The on-line designed controllers are shown to be robust to both system noise and external disturbances while still demonstrating excellent steadystate and dvnamic characteristics.©2004 IEEE.

关键词： controllers

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Active coprime factorization for 2-DOF control configuration

Active coprime factorization for 2-DOF control configuration

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Proceedings of the Biannual World Automation Congress

作者： C. Pedreg R. Vilanova I. Serra R. Moreno Systems Engineering and Automatic Control Group Universitat Autonoma de Barcelona Spain

In this paper we present a new 2-DOF control configuration based on a right coprime factorization of the plant and the usage of the partial state as controlled variable. The presented approach makes use of an observer-based feedback control scheme which is designed first to guarantee some levels of stability robustness. This is done by solving a constrained H ∞ optimization problem using the right coprime factorization of the plant in an active way. Then, a prefilter controller is computed to guarantee robust open-loop processing of the reference commands. This is done by assuming a Reference Model and by solving a Model Matching Problem imposed on the pretilter controller.

关键词： Open loop systems Robust control automatic control control systems Robust stability Feedback control Constraint optimization Output feedback Adaptive control Error correction

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A mobile haptic interface mastering a mobile teleoperator

A mobile haptic interface mastering a mobile teleoperator

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2004 IEEE/RSJ International Conference on Intelligent Robots and systems (IROS) (IEEE Cat. No.04CH37566)

作者： N. Nitzsche G. Schmidt Institute of Automatic Control Engineering Interactive Systems & Control Group Technische Universität München Munchen Germany

As a novel approach to force-reflecting teleoperation of a mobile teleoperator (MTO), a mobile haptic interface (MHI) is presented. The MHI actively follows the locomotion of an operator, who is no longer bound to be stationary during interaction with a remote environment. Thus, operator locomotion can be used as input for locomotion control of the MTO while keeping the advantage of force-reflection. The paper introduces a new paradigm for the position control of a nonholonomic platform and a new approach for the coupling of display and teleoperator in a teleoperation setup.

关键词： Haptic interfaces Teleoperators Humans automatic control Force control control systems Legged locomotion Navigation systems engineering and theory Interactive systems

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VISHARD10, a novel hyper-redundant haptic interface

VISHARD10, a novel hyper-redundant haptic interface

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International Symposium on Haptic Interfaces for Virtual Environment and Teleoperator systems (HAPTICS)

作者： M. Ueberle N. Mock M. Buss Control Systems Group Faculty IV-EECS Technische Universität Berlin Germany Institute of Automatic Control Engineering Technische Universität München Germany

This paper presents and discusses the design of a novel hyper-redundant haptic interface with 10 degrees-of-freedom (DOF). The use of additional joints allow:; a significantly larger workspace, while reducing the overall device size. Moreover, an increase in a variety of dexterity measures and a singularity robust redundancy resolution can be achieved. Numerical simulations of standard methods for inverse kinematics resolution, namely pseudo inverse control and the projection of some side criterion on the nullspace of the Jacobian are compared and evaluated.

关键词： Haptic interfaces Kinematics Force control Force feedback automatic control control systems Virtual reality Hardware Rendering (computer graphics) Shape control

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On-line multiobjective automatic control system generation by evolutionary algorithms

On-line multiobjective automatic control system generation b...

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IEEE International Symposium on Industrial Electronics (ISIE)

作者： P. Stewart D.A. Stone P.J. Fleming Electrical Machines and Drives Research Group Department of Electronic and Electrical Engineering University of Sheffield UK Department of Automatic Control and Systems Engineering University of Sheffield Sheffield UK

Evolutionary algorithms are applied to the on-line generation of servo-motor control systems. In this paper, the evolving population of controllers is evaluated at run-time via hardware in the loop, rather than on a simulated model. Disturbances are also introduced at run-time in order to produce robust performance. Multiobjeciive optimisation of both PI and fuzzy logic controllers is considered. Finally an on-line implementation of genetic programming is presented based around the Simulink standard blockset. The on-line designed controllers are shown to be robust to both system noise and external disturbances while still demonstrating excellent steady-state and dynamic characteristics.

关键词： automatic generation control Evolutionary computation control systems Runtime Noise robustness automatic control Hardware Fuzzy logic Genetic programming Robust control

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Implementation of constrained predictive outer-loop controllers: Application to a boiler control system 15th

Implementation of constrained predictive outer-loop controll...

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15th World Congress of the International Federation of automatic control, 2002

作者： Tadeo, Fernando Alvarez, Teresa Grimble, Mike Vilanova, Ramon Departamento de Ingenieria de Sistemas y Automática Facultad de Ciencias Universidad de Valladolid Valladolid47011 Spain Industrial Control Centre Strathclyde University United Kingdom Automatic Control and Systems Engineering Group Dept. of Computer Science Universitat Autonoma de Barcelona Bellaterra Barcelona08193 Spain

ISBN: (纸本)9783902661746

This paper addresses the problem of implementing predictive controllers for supervisory level control systems. In this configuration the manipulated variables calculated by the Predictive controller are used as command signals for the Distributed control systems, which provide references to the operator-tuned local PID controllers that act on the physical system. This structure introduces the problem of loosing of performance if the inner-loop controllers are re-tuned. The paper discusses the solution to this problem based on the use of a two-degrees-of-freedom structure in the inner loop, that separates open and closed-loop properties. Both design guidelines and robustness issues are discussed. Copyright © 2002 IFAC.

关键词： controllers

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