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INDIVIDUALISED APPROACHES IN control EDUCATION COURSES WITH LARGE NUMBER OF STUDENTS

IFAC Proceedings Volumes 2006年第6期39卷 529-534页

作者： M. Fikar R. Valo Čirka M. Bakoŝová M. Huba Department of Information Engineering and Process Control Faculty of Chemical and Food Technology STU Radlinského 9 812 37 Bratislava fax : +421 2 52496469 Department of Automation and Control Faculty of Electrical Engineering and Information Technology STU IlkoviČova 3 812 19 Bratislava

The aim of this paper is to give an overview about some ideas that have been introduced in past few years to the course Automatic control Fundamentals at FCFT STU. These involve heavy use of information technologies and reduction of repetitive pedagogic work using e-learning techniques for the course with a large number of students. The paper discusses reasons for this change as well as concrete technologies in question.

关键词： control engineering Information technologies E-learning XML

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control of a distillation column: A decentralized approach

Control of a distillation column: A decentralized approach

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IEEE International Conference on Computer-Aided Design

作者： Iman Makaremi Batool Labibi Advanced Automation and Digital Control Laboratory Control Department Electrical Engineering Faculty K.N. Toosi University of Technology Tehran Iran Process Control Laboratory Control Department Electrical Engineering Faculty K.N. Toosi University of Technology Tehran Iran

This paper presents a decentralized controller for a binary distillation column. The interactions between subsystems are considered as uncertainty. Then appropriate local H infin problems are defined such that by solving them and applying the designed controller to the system, closed-loop stability and diagonal dominance are guaranteed

关键词： Distillation equipment control systems MIMO Distributed control Uncertainty Stability Digital control Automatic control Isolation technology Process control

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High-rise buildings under earthquake excitation: Stabilization using SMC

High-rise buildings under earthquake excitation: Stabilizati...

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作者： Dimirovski, Georgi M. Zhao, Jun Vukobratovic, Miomir K. Dogus University Faculty of Engineering Dept. of Computer Engineering Acibadem Zeamet Sk. 21 Kadikoy TR-34722 Istanbul Turkey SS Cyril and Methodius University Faculty of Electrical Engineering Rugjer Boskovic b.b. Karpos II MK-1000 Skopje Macedonia Northestern University School of Information Science and Engineering Institute of Control Science Shenyang Liaoning CN-110004 China Mihailo Pupin Institute Laboratory of Robotics and Automation Volgina 15 Karaburma 11000 Serbia

ISBN: (纸本)9783902661173

The goal to control the dynamics of high-rise buildings either to ameliorate the damage or prevent their destruction when subject to an earthquake excitation has been subject of extensive research. All known control designs have advantages and disadvantages as well as operating limits. The application of sliding-mode control to controlling earthquake induced vibrations of a multi-story structural system as an active seismic compensation plus base isolation has been investigated. The performance has been compared to the one of traditional industrial controls, and relevant conclusions drawn. Simulation results, carried out using El Centro earthquake acceleration, have shown that the sliding mode control can decrease significantly displacements of the floors. Copyright © 2006 IFAC.

关键词： Earthquakes

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Multi-Obstacle Avoidance Based on the Method of Fuzzy-Function for Mobile Robot

Multi-Obstacle Avoidance Based on the Method of Fuzzy-Functi...

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World Congress on Intelligent control and automation (WCICA)

作者： Feng Zhang Dalong Tan Faculty of Information and Control Engineering Shenyang Jianzhu University Shenyang China Robotics Laboratory Shenyang Institute of Automation Chinese Academy and Sciences Shenyang China

This paper presented a method of collision avoidance based on the fuzzy-function focus on the complex environment existing multi-obstacle for mobile robot. It constructs the curve of fuzzy-function by defining the function of degree of risk, and changes the problem of two-dimension into one-dimension for collision avoidance. The experiment of simulation verified its validity

关键词： Mobile robots Collision avoidance Robotics and automation control engineering Chaos Intelligent control

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ANTI-SYNCHRONIZATION CHAOS SHIFT KEYING METHOD BASED ON GENERALIZED LORENZ SYSTEM

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IFAC Proceedings Volumes 2006年第8期39卷 323-328页

作者： Sergej Ĉelikovský Volodymyr Lynnyk Michael Šebek Institute of Information Theory and Automation Academy of Sciences of the Czech Republic P.O. Box 18 182 08 Prague 8 Czech Republic Department of Control Engineering Faculty of Electrical Engineering Czech Technical University in Prague Czech Republic

In this paper, a modified version of the Chaos Shift Keying (CSK) scheme for secure encryption and decryption of data is proposed. The proposed scheme uses the effect of anti-synchronization, rather than synchronization. More specifically, the classical CSK method determines the correct value of binary signal through checking which unsynchronized system is getting synchronized. On the contrary, our novel method determines wrong value of binary signal through checking which already synchronized system is loosing synchronization. The advantage of the proposed method is two-fold. First, it requires very reasonable amount of data to encrypt and time to decrypt a single bit. Secondly, its security can be investigated and estimated as practically unbreakable. The main reason for both advantages is that anti-synchronization is thousand times faster than synchronization, even when using two close each to other chaotic systems. Our method is implemented and thoroughly tested on the recently introduced generalized Lorenz system (GLS) family making advantage of its special parametrization.

关键词： Nonlinear system observer chaos shift keying generalized Lorenz system synchronization anti-synchronization secure communication

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A Linguistic control Method for Posture Stabilization of Wheeled Mobile Robot

A Linguistic Control Method for Posture Stabilization of Whe...

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World Congress on Intelligent control and automation (WCICA)

作者： Jianning Hua Yuechao Wang Feng Zhang Robotics Laboratory Shenyang Institute of Automation Chinese Academy and Sciences Shenyang Liaoning China Faculty of Information and Control Engineering University of Shenyang Jianzhu Shenyang Liaoning China

A linguistic control method based on motion description languages for posture stabilization of wheeled mobile robot is presented in this paper. In robotic systems control actions should be selected and executed by the triggering events. As a result, robotic systems typically possess a hierarchical structure, characterized by continuous variable dynamics at the lowest level and logical decision-making at the highest. Motion description languages, inspired by formal languages and automaton theory, serve as an abstraction between continuous and discrete control. Unlike traditional methods, the linguistic control method can be used to describe completely the interactions between robot and the environments in which it operates, and the complexity for steering a robot can also be measured quantitatively. The posture stabilization problem for wheeled mobile robots is studied and simulation results verify the validity of this method

关键词： Mobile robots Robot kinematics Automatic control Robotics and automation Motion control Automata Trajectory Robot control control systems Formal languages

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ANALYSIS OF FRACTIONAL - ORDER ROBOT AXIS DYNAMICS

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IFAC Proceedings Volumes 2006年第11期39卷 367-372页

作者： J.M. Rosario D. Dumur J.A. Tenreiro Machado Laboratory of Automation and Robotics - Faculty of Mechanical Engineering UNICAMP - University of Campinas 13083-970 – Campinas- SP Brazil Department of Automatic Control SUPELEC 91192 - Gif-sur-Yvette France Department of Electrical Engineering Institute of Engineering Polytechnic Institute of Porto 4200-072 Porto Portugal

Robots are complex mechatronics systems where several electric drives are employed to control the movement of articulated structures. In industrial environments they must perform tasks with rapidity and accuracy in order to produce goods and services with minimal production time. These procedures require the use of flexible robots which can act in a large workspace, thus subjected to important parameters variations and nonlinear dynamics effects. This paper investigates the fractional order dynamics during the evolution of trajectories of three robotic joints, considering the complete system dynamics.

关键词： Mechatronics Robotics Simulation Dynamics control Fractional calculus

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Si(111)−α−3×3−Au phase modified by In adsorption: Stabilization of a homogeneous surface by stress relief

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Physical Review B 2006年第11期73卷 115335-115335页

作者： D. V. Gruznev I. N. Filippov D. A. Olyanich D. N. Chubenko I. A. Kuyanov A. A. Saranin A. V. Zotov V. G. Lifshits Institute of Automation and Control Processes 690041 Vladivostok Russia Faculty of Physics and Engineering Far Eastern State University 690000 Vladivostok Russia Department of Electronics Vladivostok State University of Economics and Service 690600 Vladivostok Russia

Structural transformations on the Si(111)−α−3×3−Au surface induced by In adsorption have been studied using scanning tunneling microscopy and first-principles total-energy calculations. It has been found that In adsorption results in the transformation of the 3×3−Au phase to the 3×3−(Au,In) phase. At room temperature, the transformation is limited by the interior of the original 3×3−Au domains and does not affect the domain-wall structure. Upon annealing at 600°C, the domain walls are eliminated and highly ordered almost defect-free homogeneous 3×3−(Au,In) surface develops. The 3×3−(Au,In) surface phase contains 1 monolayer (ML) of Au, 1 ML of Si and about 0.15 ML of In. Plausible mechanism of stabilization of the domain-wall-free Si(111)3×3−(Au,In) surface is the stress relief caused by In adsorption.

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EDUSCA (Educational SCAda): Features and applications

EDUSCA (Educational SCAda): Features and applications

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作者： Santos, Raúl Alves Normey-Rico, Julio E. Gómez, Alejandro Merino De Prada Moraga, Cesar Center of Sugar Tecnology University of Valladolid Edificio Alfonso VIII 47011 Valladolid Spain Department of Automation and Systems Federal University of Santa Catarina CTC-UFSC 88040-900 Florianópolis-SC Brazil Department of Systems Engineering and Automatic Control University of Valladolid Faculty of Sciences c/ Real de Burgos s/n 47011 Valladolid Spain

ISBN: (纸本)9783902661074

This paper presents EDUSCA, an EDUcational SCAda with OPC data access. EDUSCA was specially designed for automatic control education, research and operator training purposes. The developed system takes advantage of the facilities offered by the OPC communication architecture. The system allows the students to face real practical problems, could be used to train operators in plant supervision and also allows the implementation of research functionalities. Their main advantages of EDUSCA are: (i) it can be connected to any plant whenever it includes OPC communications;(ii) it is free of licenses, thus it can be installed in many computers as necessary;(iii) it can be adapted to each application requirements and (iv) it allows the implementation of a diverse set of functionalities, as for example, control algorithms. Copyright © 2006 IFAC.

关键词： Personnel training

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PSO-E: Particle Swarm with Exponential Distribution

PSO-E: Particle Swarm with Exponential Distribution

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Congress on Evolutionary Computation

作者： R.A. Krohling L. dos Santos Coelho Control Systems Engineering RST Faculty of Electrical Engineering and Information Technology University of Dortmund Dortmund Germany Automation and Systems Laboratory LAS/PPGEPS/CCET/PUCPR Pontifical Catholic University of Paraná Curitiba Parana Brazil

Studies with the Gaussian and Cauchy probability distributions have shown that the performance of the standard PSO algorithm can be improved. But these versions may also get stuck in local minima when optimizing functions with many local minima in high dimensional search space. In this paper, we will provide new results with PSO using the Exponential probability distribution aiming at improvement in performance. This version of the algorithm, termed PSO-E, was tested on a suite of well-known benchmark functions with many local optima and the results were compared with those obtained by the standard PSO (constriction factor). Simulation results show the suitability of PSO-E.

关键词： Particle swarm optimization Exponential distribution Probability distribution Stochastic processes Benchmark testing Random number generation Probability density function Automatic control control systems Systems engineering and theory

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