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MULTIVARIABLE control OF A REDUCTION FURNACE

IFAC Proceedings Volumes 2007年第5期40卷 231-236页

作者： Mercedes Ramírez-Mendoza Pedro Albertos Department of Automatic Control Faculty of Electrical Engineering Universidad de Oriente. Santiago de Cuba Cuba Department of Systems Engineering and Control Universidad Politécnica de Valencia. España

In the world of control the enormous difficulties encountered in reaching satisfactory results with the design and implementation of controllers for Multi-Input/Multi-Output (MIMO) processes are well known, in particular; when the interactions can not be ignored. This situation becomes even more complicated when the control process exhibits non-linear and/or time-varying dynamic characteristics. Not uncommonly, system designers of industrial processes control have to face such complexities. This paper describes the experience attained by the authors in the design of a fuzzy control system for a reduction furnace in a nickel processing plant, which exhibits the above mentioned characteristics.

关键词： Fuzzy control fuzzy controller reduction multihearth furnace multivariable systems

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Hand shape classification using DTW and LCSS as similarity measures for vision-based gesture recognition system

Hand shape classification using DTW and LCSS as similarity m...

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EUROCON 2007 - The International Conference on " Computer as a Tool" (EUROCON 2007), vol.2

作者： Ana Kuzmanic Vlasta Zanchi Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Laboratory for Biomechanics and Automatic Control Systems University of Split Split Croatia

In this paper an approach to classify hand shapes into different classes according to the similarity measures between features is proposed. We show how to use an Exploratory Data Analysis to extract novel, single feature of hand from images. Based on the obtained curve-like shape of the feature, hands are classified into one of 21 possible classes of Croatian sign language using Dynamic Time Warping and Longest Common Subsequence as similarity measures. Performance of the system was evaluated with 1260 images. Results show that high classification accuracy can be obtained from a single feature recognition and a small number of training sample.

关键词： Image recognition Image classification Similarity measures Image representation Sign language

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Active Eye-tracking System by Using Quad PTZ Cameras

Active Eye-tracking System by Using Quad PTZ Cameras

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Annual Conference of Industrial Electronics Society

作者： Chao-Ning Chan Shunichiro Oe Chern-Sheng Lin Department of Intelligence Systems and Information Science Faculty of Engineering University of Tokushima Japan Department of Automatic Control Engineering Feng Chia University FCU Taichung Taiwan

There have been many researches on eye-tracking systems to estimate eye gaze and integrated with head movement tracking. In this paper, we describe an active eye- tracking system that can provide usability improvement of human-machine interface (HMI) with quad PTZ cameras. We propose an active tracking architecture for real-time eye- tracking in an open environment to get a wide-angle and long-distance available range. We implemented four following parts: face tracking module by Adaboost algorithm, eye detection module by Cognitive calibration algorithm, active control module by integration algorithm and input control module by diagonal-box checker search. We presented an active eye-tracking system that users can use it in unrestricted posture with different angles and distance to the pc. It can calculate the camera target position and then map the gazing point to screen coordinate. We can choice any user to track eye gazing when there are multi-users in front of the pc. The results provide a useful HMI for large head motion and long distance usages.

关键词： Cameras Calibration Usability Magnetic heads Contacts Magnetic field measurement Face detection Humans Lenses Magnetic sensors

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Development of an active gaze tracking system in unrestricted posture

Development of an active gaze tracking system in unrestricte...

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International Conference on control, Automation and systems ( ICCAS)

作者： Chan Chao Ning Oe Shunichiro Chern-Sheng Lin Department of Intelligence Systems and Information Science Faculty of Engineering University of Tokushima Japan Department of Automatic Control Engineering Feng Chia University FCU Taichung Taiwan

In this paper we describe an active gaze-tracking system that can provide an interactive interface with computer by using PTZ cameras. We propose an active tracking architecture for real-time gaze-tracking in an open environment and recorded the data into the database for diagnosis. When the cursor is out of control by gazing, a technical improvement theory is used to account for the reflective action of psychological natural reaction to correct the relevant process automatically. This architecture consists of four following parts: face tracking module, eye tracking module, active control module and input control module. We present a high accuracy gaze tracking system which can dynamically estimate the better target position of four PTZ and map the gazing point to screen coordinates. A user can use the active gaze-tracking system without difficult calibration and restricted posture.

关键词： Calibration Usability automatic control Target tracking Cameras Magnetic heads Contacts Magnetic field measurement Psychology Humans

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MARKOV DECISION PROCESSES WITH UNCERTAIN TRANSITION RATES: SENSITIVITY AND MAX HYPHEN MIN control

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Asian Journal of control 2008年第2期6卷

作者： Suresh Kalyanasundaram Edwin K. P. Chong Ness B. Shroff Motorola India Electronics Limited No. 66/1 Plot 5 Bagmane Techpark C. V. Raman Nagar Post Bangalore 560 093 India. Department of Electrical and Computer Engineering Colorado State University Fort Collins CO 80523-1373 USA. Professor Edwin K. P. Chong received the B.E.(Hons.) degree with First Class Honors from the University of Adelaide South Australia in 1987 graduating top of his class and the M.A. and Ph.D. degrees in 1989 and 1991 respectively both from Princeton University where he held an IBM Fellowship. He joined the School of Electrical and Computer Engineering at Purdue University in 1991 where he was named a University Faculty Scholar in 1999 and promoted to Full Professor in 2001. Since August 2001 he has been a Professor of Electrical and Computer Engineering and Professor of Mathematics at Colorado State University. His current interests are in communication networks and optimization methods. He coauthored the best-selling book An Introduction to Optimization 2nd Edition Wiley-Interscience 2001. He received the NSF CAREER Award in 1995 and the ASEE Frederick Emmons Terman Award in 1998. He coauthored a paper that was awarded Best Paper in the journal Computer Networks 2003. Professor Chong is a Fellow of the IEEE. He was founding chairman of the IEEE Control Systems Society Technical Committee on Discrete Event Systems and until recently served as an IEEE Control Systems Society Distinguished Lecturer. He has been on the editorial board of the IEEE Transactions on Automatic Control. He is currently on the editorial board of the journal Computer Networks. He has also served on the organizing committees of several international conferences. He has been on the program committees for the IEEE Conference on Decision and Control the American Control Conference the IEEE International Symposium on Intelligent Control IEEE Symposium on Computers and Communications and the IEEE Global Telecommunications Conference. He has also served in the executive committees for the IEEE Co

Solution techniques for Markov decision problems rely on exact knowledge of the transition rates, which may be difficult or impossible to obtain. In this paper, we consider Markov decision problems with uncertain transition rates represented as compact sets. We first consider the problem of sensitivity analysis where the aim is to quantify the range of uncertainty of the average per-unit-time reward given the range of uncertainty of the transition rates. We then develop solution techniques for the problem of obtaining the max-min optimal policy, which maximizes the worst-case average per-unit-time reward. In each of these problems, we distinguish between systems that can have their transition rates chosen independently and those where the transition rates depend on each other. Our solution techniques are applicable to Markov decision processes with fixed but unknown transition rates and to those with time-varying transition rates.

关键词： Markov decision processes sensitivity max-min control call admission control policy iteration

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Robust PID decentralized controller design using LMI

Robust PID decentralized controller design using LMI

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1st IFAC Workshop on Applications of Large Scale Industrial systems, ALSIS'06

作者： Rosinová, Danica Veselý, Vojtech Department of Automatic Control Systems Faculty of Electrical Engineering and IT Slovak University of Technology Bratislava Slovakia

ISBN: (纸本)9783902661159

The new LMI based method for robust stability analysis for linear uncertain system with PID controller is proposed. The general constrained structure of controller matrix is considered appropriate for both output feedback and decentralized control and the respective guaranteed cost control design scheme is presented. The sufficient robust stability condition is developed for extended quadratic performance index including first derivative of the state vector to damp oscillations. The obtained stability condition is formulated for parameter-dependent Lyapunov function. Copyright © 2006 IFAC.

关键词： Lyapunov functions

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Preface

Advanced Textbooks in Control and Signal Processing

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Advanced Textbooks in control and Signal Processing 2007年第9781846288722期 ix-xii页

作者： Hrúz, Branislav Zhou, Mengchu Department of Automatic Control Systems Faculty of Electrical Engineering and Information Technology Slovak University of Technology Bratislava 1812 19 Slovakia Department of Electrical and Computer Engineering New Jersey Institute of Technology NewarkNJ07102 United States

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Simulation and experimental studies of hybrid learning control with acceleration feedback for flexible manipulators

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8th International Conference on Climbing and Walking Robots and the Support Technologies for Mobile Machines, CLAWAR 2005

作者： Md Zain, M.Z. Alam, M.S. Tokhi, M.O. Mohamed, Z. Department of Automatic Control and Systems Engineering University of Sheffield United Kingdom Faculty of Electrical Engineering Universiti Teknologi Malaysia 81310 UTM Skudai Malaysia

ISBN: (纸本)3540264132

This paper presents investigations at developing a hybrid iterative learning control scheme with acceleration feedback (PDILCAF) for flexible robot manipulators. An experimental flexible manipulator rig and corresponding simulation environment are used to demonstrate the effectiveness of the proposed control strategy. In this work the dynamic model of the flexible manipulator is derived using the finite element (FE) method. A collocated proportional- derivative (PD) controller utilizing hub-angle and hub-velocity feedback is developed for control of rigid-body motion of the system. This is then extended to incorporate iterative learning control with acceleration feedback and genetic algorithms (GAs) for optimization of the learning parameters for control of vibration (flexible motion) of the system. The system performance with the controllers is presented and analysed in the time and frequency domains. The performance of the hybrid learning control scheme without and with acceleration feedback is assessed in terms of input tracking, level of vibration reduction at resonance modes and robustness with various. © 2006 Springer-Verlag Berlin Heidelberg.

关键词： Genetic algorithms

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A mixed continuous-batch process: Implementation of hybrid predictive controllers

A mixed continuous-batch process: Implementation of hybrid p...

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作者： Sarabia, D. De Prada, C. Cristea, S. Dpt. Systems Engineering and Automatic Control Faculty of Sciences University of Valladolid c/ Real de Burgos s/n 47011 Valladolid Spain

ISBN: (纸本)9783902661074

This paper deals with a mixed continuous-batch process, a pilot plant of our Lab, where both continuous decisions and scheduling take place. The interest of this contribution comes not only from the fact that it is a challenging control problem, but because problems with a similar structure are present in many industrial process. The paper describes the process, the instrumentation (classical analogical/discrete devices, Field Bus devices) and the global architecture of the pilot plant control (Distributed control System DCS, Supervisory control and Data Acquisition SCADA, OPC communication, etc.). From a control point of view, it presents a brief description of control problem formulation in the framework of non-linear model predictive control, and a generic methodology to design this kind of predictive controllers. Finally it is presented the results of some real experiments. Copyright © 2006 IFAC.

关键词： Model predictive control

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Robust output feedback affine quadratic controller design

Robust output feedback affine quadratic controller design

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作者： Hypiusová, M. Veselý, V. Grman, L. Department of Automatic Control Systems Faculty of Electrical Engineering and Information Technology Slovak University of Technology Ilkovičova 3 812 19 Bratislava Slovakia

ISBN: (纸本)9783902661104

The paper deals with the robust output feedback controller design with guaranteed cost and affine quadratic stability for linear continuous time systems. The proposed approach leads to an iterative LMI based algorithm. Numerical examples are studied to verify effectiveness of the proposed method. The obtained results are compared with some other design procedures for robust affine quadratic controller design and robust parameter-dependent quadratic stability. Copyright © 2006 IFAC.

关键词： Robust control

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