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Custom winding ratio analysis of evolutionary optimized audio transformer

Custom winding ratio analysis of evolutionary optimized audi...

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Conference on Modern Methods of Prediction, Modeling and Analysis of Nonlinear Systems, Nostradamus 2012

作者： Pospisilik, Martin Kouril, Lukas Adamek, Milan Zelinka, Ivan Jasek, Roman Tomas Bata University in Zlin Faculty of Applied Informatics Nam. T.G.M. 5555 Zlin Czech Republic Department of Computer Science Faculty of Electrical Engineering and Computer Science VŠB-TUO 17. listopadu 15 708 33 Ostrava-Poruba Czech Republic

ISBN: (纸本)9783642332265

This paper is intended to present a trend analysis resulting from different secondary to primary windings ratio of evolutionary optimized audio transformer. Evolutionary optimization of audio transformers is a perspective approach to the wideband audio transformers design by employing methods of artificial intelligence algorithms. This novel approach to audio transformers designing has a notable implication for problematics related to audio transformers complex design process. The authors are building on their previous research by trying to determine the trends which can be observed by selecting different secondary to primary windings ratio of evolutionary designed audio transformer. These trends can be useful at further optimization of the designing algorithms. © 2013 Springer-Verlag.

关键词： Winding

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Self-Authentication Mechanism with Recovery Ability for Digital Images

Self-Authentication Mechanism with Recovery Ability for Digi...

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International Conference on Complex, Intelligent and Software Intensive Systems, CISIS

作者： Yi-Hui Chen Chih-Yang Lin Wanutchaporn Sirakriengkrai Department of Applied Informatics and Multimedia Asia University Taichung Taiwan Department of Computer Science & Information Engineering Asia University Taichung Taiwan

ISBN: (纸本)9781479905478

Nowadays, Authentication mechanism is widely applied to digital images. In this paper, we propose a self authentication mechanism with recovery ability for digital images, which is employed to protect the image during transmission over the internet. In the scheme, the image is to authenticate whether the area is modified by comparing the generated authentication code and hidden authentication code together. In our experimental result, we show the positive result for the feasibility of the proposed scheme.

关键词： Authentication Equations Watermarking Cryptography Image reconstruction Mathematical model Visualization

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Designing PID Controllers by Means of PSO Algorithm Enhanced by Various Chaotic Maps

Designing PID Controllers by Means of PSO Algorithm Enhanced...

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EUROSIM Congress on Modelling and Simulation (EUROSIM)

作者： Michal Pluhacek Roman Senkerik Ivan Zelinka Donald Davendra Faculty of Applied informatics TBU in Zlin Zlin Czech Republic Department of Computer Science Faculty of Electrical Engineering and Computer Science Ostrava Czech Republic

This paper presents results of the utilization of four different discrete chaotic maps as pseudo-random number generators for the particle swam optimization algorithm in the task of PID controller design for two diffe... 详细信息

关键词： Chaos Algorithm design and analysis DC motors Particle swarm optimization Cost function Standards

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Evolutionary synthesis of control rules by means of analytic programming for the purpose of high order oscillations stabilization of evolutionary synthesized chaotic system

Evolutionary synthesis of control rules by means of analytic...

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Conference on Modern Methods of Prediction, Modeling and Analysis of Nonlinear Systems, Nostradamus 2012

作者： Senkerik, Roman Oplatkova, Zuzana Zelinka, Ivan Tomas Bata University in Zlin Faculty of Applied Informatics T.G. Masaryka 5555 760 01 Zlin Czech Republic VŠB-Technical University of Ostrava Faculty of Electrical Engineering and Computer Science Department of Computer Science 17. listopadu 15 708 33 Ostrava-Poruba Czech Republic

ISBN: (纸本)9783642332265

In this paper, it is presented a utilization of tool for symbolic regression, which is analytic programming, for the purpose of the synthesis of a new control law. This synthesized chaotic controller secures the stabilization of high periodic orbit - oscillations between several values of selected one-dimensional discrete chaotic system, which is artificially evolutionary synthesized system. The paper consists of the descriptions of analytic programming as well as chaotic system, used evolutionary techniques and the cost function. For experimentation, Self-Organizing Migrating Algorithm (SOMA) and Differential evolution (DE) were used. © 2013 Springer-Verlag.

关键词： Chaotic systems

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Petri net approach for deadlock prevention in robot planning

Petri net approach for deadlock prevention in robot planning

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International Conference on Emerging Technologies and Factory Automation (ETFA)

作者： Marius Kloetzer Cristian Mahulea José-Manuel Colom Department of Automatic Control and Applied Informatics Gheorghe Asachi Technical University Romania Department of Computer Science and Systems Engineering University of Zaragoza Spain

This paper provides a strategy for supervising the motion of some mobile robots that evolve in the same environment. Some regions of the environment are assumed to have a limited capacity in terms of the number of robots that can simultaneously occupy them, and a set of possible trajectories is available for each robot. The solution comprises the construction of a specific Petri net model for the available trajectories, and the use of resource-allocation techniques based on restricted-capacity regions and on deadlock-free execution.

关键词： Trajectory Collision avoidance System recovery Robot kinematics Computational modeling Planning

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Towards Scaffolding Problem-Solving Implementation Process in Undergraduate Programming Course

Towards Scaffolding Problem-Solving Implementation Process i...

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International Conference on Advanced Learning Technologies (ICALT)

作者： Li-Ling Hu Shian-Shyong Tseng Tsung-Ju Lee Department of Computer Science and Information Engineering Asia University Taichung Taiwan Department of Applied Informatics and Multimedia Asia University Taichung Taiwan Department of Computer Science NCTU HsinChu Taiwan

ISBN: (纸本)9781479903733

computer programming learning is an important and challenging process for novice students. Previous approaches often address the learning problem of creating algorithm and familiarizing syntax. However, students still need the extra programming knowledge of selecting proper data structure to implement the program. In this paper, the scaffolding approach is used to assist students in comprehending the problem-solving strategy to find suitable data structure. In the experiment, 55 students participated in the two groups' pretest and posttest evaluation. The experimental results showed that the experimental group achieves higher learning achievement than the control group. The results suggest that computer-assisted scaffolding can be exploited as effective and motivational learning guidance for students.

关键词： Programming profession Data structures Problem-solving Educational institutions

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2-DOF control solutions for an electric drive system under continuously variable conditions

2-DOF control solutions for an electric drive system under c...

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International Symposium on applied Computational Intelligence and informatics ( SACI)

作者： Alexandra-Iulia Stinean Stefan Preitl Radu-Emil Precup Claudia-Adina Dragos Emil M. Petriu Mircea-Bogdan Radac Department of Automation and Applied Informatics Politehnica University of Timisoara Timisoara Romania School of Electrical Engineering and Computer Science University of Ottawa Ottawa Canada

The paper deals with control solutions for an electric drive system where the reference and the load disturbance are continuously variable and the plant has variable parameters. The main variable parameter of the process is the moment of inertia in the context of a system that corresponds to laboratory equipment. Using a detailed mathematical model of the process and the particular features of the drive system, the paper proposes variable control structures with switching between three or more control algorithms. This solution is preferred instead of a continuously parameter adaptation due to its simplicity in adaptation to the representative operating points. The control design results are focused on development of two-degree-of-freedom PID control solutions. The control solutions are applied in case studies based on digital simulation but, considering fixed values of the process parameters, they can be easily verified on laboratory equipment [1]. The proposed control solutions have a large applicability in the field of mechatronics systems, where such applications with variable moment of inertia and control system inputs are always present.

关键词： Strips Mathematical model Polynomials Control systems Algorithm design and analysis Windings

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Solutions to avoid the worst case scenario in driving systems working under continuously variable conditions

Solutions to avoid the worst case scenario in driving system...

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International Conference on Computational Cybernetics (ICCC)

作者： Alexandra-Julia Stinean Stefan Preitl Radu-Emil Precup Claudia-Adina Dragos Emil M. Petriu Mircea-Bogdan Radac Department of Automation and Applied Informatics Politehnica University of Timisoara Timisoara Romania School of Electrical Engineering and Computer Science University of Ottawa Ottawa Canada

The paper presents a study on the behavior of some control solutions for electric drive systems evolving in conditions of reference, disturbance and parameter variability. The results of this study substantiate new control solutions that ensure the possibility to avoid the worst cases. The study addresses the real situation of an electric drive system with continuously variable reference input (speed), variable moment of inertia and variable load disturbance. Two control structures with controllers with fixed parameters are considered and discussed with focus on the speed control loop. The justified new control structures employ the switching between several control algorithms; their design is based on the detailed mathematical model of the plant and on the particular features of the drive system. The solutions are validated by means of digital simulations and experiments on a laboratory equipment application for three values of the moment of inertia.

关键词： Drives Strips Switches Mathematical model Laboratories Velocity control

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Simulated annealing approach to fuzzy modeling of servo systems

Simulated annealing approach to fuzzy modeling of servo syst...

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IEEE International Conference on Cybernetics

作者： Radu-Emil Precup Mircea-Bogdan Radac Claudia-Adina Dragos Stefan Preitl Emil M. Petriu Department of Automation and Applied Informatics Politehnica University of Timisoara Timisoara Romania School of Electrical Engineering and Computer Science University of Ottawa Ottawa Canada

This paper proposes an approach to the fuzzy modeling of servo systems using Simulated Annealing (SA) algorithms. A set of local state-space models is obtained from the first principle models of the process. The initial Takagi-Sugeno-Kang (TSK) fuzzy models are obtained by the modal equivalence principle, where the local state-space models are placed in the rule consequents. Optimization problems are defined aiming the minimization of objective functions expressed as integrals of squared modeling errors. The variables of the objective functions are the limits of the supports of the input membership functions and the kernels of these membership functions are kept constant. SA algorithms are implemented to solve the optimization problems which yield optimal TSK fuzzy models. A set of realtime experimental results for a laboratory nonlinear servo system validates the new optimal TSK fuzzy models.

关键词： Servomotors Optimization Linear programming Vectors Fuzzy control Fuzzy sets Mathematical model

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Modeling and control of an Electric drive system with continuously variable reference, moment of inertia and load disturbance

Modeling and control of an Electric drive system with contin...

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Asian Control Conference

作者： Alexandra-Iulia Stinean Stefan Preitl Radu-Emil Precup Claudia-Adina Dragos Mircea-Bogdan Radac Emil M. Petriu Department of Automation and Applied Informatics Politehnica University of Timisoara Timisoara Romania School of Electrical Engineering and Computer Science University of Ottawa Ottawa Canada

ISBN: (纸本)9781467357661

This paper presents applicative aspects concerning the modeling, simulation, analysis and design of control solutions for a direct current electric drive system with continuously variable reference input (speed), variable moment of inertia and variable load disturbance. Two variable control structures for speed control are treated. The structures employ the switching between three or more control algorithms, and their design is based on the detailed mathematical model of the plant and on the particular features of the drive system. Conventional and fuzzy control solutions are offered as they are advantageous with respect to the continuous parameter adaptation because of the simplicity in adaptation at representative operating points. The solutions are validated by a digitally simulated application with fixed parameters and tested on a strip winding system laboratory equipment as a representative mechatronics system application.

关键词： Strips Windings Velocity control Torque Load modeling Drives

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