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21st International Congress of Chemical and Process Engineering, CHISA 2014 and 17th Conference on Process Integration, Modelling and Optimisation for Energy Saving and Pollution Reduction, PRES 2014

作者： Beltrán-Prieto, J.C. Slavik, R. Kolomazík, K. Pecha, J. Tomas Bata University in Zlin Department of Automation and Control Engineering Faculty of Applied Informatics Nam. T. G. Masaryka 5555 Zlin760 01 Czech Republic Tomas Bata University in Zlin Department of Environmental Engineering Protection Faculty of Technology Nam. T. G. Masaryka 275 Zlin762 72 Czech Republic

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Draining a Water Tank Using Numerical Solution - a Comparative Study

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SSRN 2024年

作者： Wendimu, Abebe Alemu Matušů, Radek Gazdoš, František Zerdazi, El Wardi Shaikh, Ibrahim Department of Automation and Control Engineering Faculty of Applied Informatics Tomas Bata University in Zlín Nad Stráněmi 4511 Zlin760 05 Czech Republic

This paper employs MATLAB simulations and various numerical methods to solve ordinary differential equations (ODEs) within a water tank drainage system. The study compares one-step methods with multistep methods to analyze global and local errors in solving differential equations. The study underscores the significance of selecting an appropriate step size in enhancing the accuracy of numerical solutions, particularly in ensuring precise outcomes for water level control applications such as chemical processing operations, bottling industries, and water tanks and reservoirs. The study aims to provide insights into the trade-offs involved in choosing various numerical methods, considering factors such as accuracy, stability, computation time, memory usage, and optimal step sizes when addressing similar problems where accuracy is crucial. © 2024, The Authors. All rights reserved.

关键词： Water tanks

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Fuzzy control of an anaerobic digestion process

Fuzzy control of an anaerobic digestion process

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International Conference on System Theory, control, and Computing (ICSTCC)

作者： Radu-Emil Precup Claudia-Adina Bojan-Dragos Marian Barbu Sergiu Caraman Department of Automation and Applied Informatics Politehnica University of Timisoara Timisoara Romania Dept. of Automatic Control and Electrical Engineering “Dunarea de Jos” University of Galati Galati Romania

The paper proposes a simple Takagi-Sugeno PI-fuzzy controller for an anaerobic digestion process. A fifth order nonlinear model of the anaerobic digestion process is first presented. A second order linear model of the process is next proposed, and the parameters of the linear model are obtained from an optimization problem solved by a Gravitational Search Algorithm. A PI controller is designed for the linear process model using a frequency domain approach in terms of imposing the phase margin. The Takagi-Sugeno PI-fuzzy controller is designed on the basis of the linear PI controller. The Takagi-Sugeno PI-fuzzy controller is validated by simulation using the nonlinear process model in the fuzzy control system.

关键词： Mathematical model Process control control systems Fuzzy control Takagi-Sugeno model Modeling Biological system modeling

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Preliminary considerations in the design of a sensor for improving the reference trajectory calculation for the individual leg of a hexapod

Preliminary considerations in the design of a sensor for imp...

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IEEE International Symposium on Intelligent Systems and informatics

作者： Zoltan Gobor Peter Odry Annamaria R. Varkonyi-Koczy Doctoral School of Applied Informatics and Applied Mathematics Obuda University Budapest Hungary Department of Control Engineering and Information Technology University of Dunaújváros Dunaujvaros Hungary Institute of Automation Obuda University Budapest Hungary

The free-climbing robots are the alternative to wheeled vehicles, because the legged locomotion allows mobility on the steep gradients under the harsh environmental conditions. The steady progression requires coordination of leg movements for which the force sensors implemented in the joints of the robot legs are not always sufficient. Considering the previous developments in the field of robotics, the combination of the impedance and vision sensors comprises an obvious solution for providing stable and accurate contact between the individual legs and the ground. The implementation of additional, non-invasive sensor/s on all the legs of the hexapod robotic platform, for the indirect measuring and analysis of the terrain surface, is investigated. Furthermore, a method for the parametric 3D modeling of simulation assemblies is described in a mixed top-down, bottom-up and middle-out design approach. Mechanisms were created using the common origin skeletal modeling (top-down approach), allowing the context analysis and the definition of the parameters for the further numerical optimization in an early phase of the development. Finally, the applicability of the anytime approach during the optimization of the mechanical parts of the mechanism in the design process was tested.

关键词： Hexapod Parametric modeling Common origin skeletal modeling Anytime algorithm Kinematical simulation

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Study of non-stationary temperature fields in printed circuit boards during separation by cutting

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International Journal of Circuits, Systems and Signal Processing 2012年第1期6卷 122-129页

作者： Janacova, D. Charvatova, H. Kolomaznik, K. Vasek, V. Mokrejs, P. Dvorak, Z. Drga, R. Tomas Bata University in Zlín Faculty of Applied Informatics Department of Automation and Control Eigineering Nám. T. G. Masaryka 5555 760 01 Zlín Czech Republic

Nowadays, growth of electronic waste represents serious global problem. Therefore, ways of its recycling are searched. In the paper we deal with the printed circuit boards recycling. We focused on study of a cutting as an alternative method of conductive ways from plastic board separation as one of stages of the printed circuit board recycling procedure. For this purpose we formulated mathematic model of the cutting process and next we used its analytical solution for its modeling by mathematic software Maple. The obtained results confirm energy intensity of the cutting process.

关键词： Printed circuit boards

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Numerous subharmonic states in Direct Torque controlled Induction Machine

Numerous subharmonic states in Direct Torque Controlled Indu...

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IEEE SSD International Multi-Conference on Systems, Signals and Devices

作者： Zoltan Suto Istvan Nagy Department of Automation and Applied Informatics Budapest University슠of슠Technology슠and슠Economics Budapest Hungary Control Research Group Hungarian Academy of Sciences (ATOMKI) Budapest Hungary

The scope of the paper is the strange behavior of direct torque controlled (DTC) induction machine (IM) resulting from the nonlinearity of hysteresis comparators. A piecewise-defined, non-stroboscopic, discrete-time Poincare map can be constructed for the system. The movement of the two controlled state variables, the stator flux linkage and the electric torque, within the hysteresis loops had to be determined from switch to switch. This complex Poincare map takes into account the fast switching operations of the voltage source converter (VSC). Periodic, subharmonic, chaotic and intermittent chaotic states along a special bifurcation series caused by discontinuity of the Poincare mapping function were detected. In order to give a better insight into the system operation, a one-dimensional piecewise linear map is developed, numerous subharmonic states were analyzed.

关键词： Torque control Induction machines Switches Electric variables control Hysteresis Chaos Stators Couplings Voltage Switching converters

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Robots control based on parameter identification and adaptive gain smooth sliding observer-controller

Robots control based on parameter identification and adaptiv...

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作者： Filipescu, A. Dugard, L. Stamatescu, S. Department of Automation Applied Informatics and Electronics University Dunarea de Jos of Galati Domneasca no.47 800008Galati Romania Laboratoire d'Automatique Grenoble CNRS/INPG UMR 5528 ENSIEG-BP 46 38402 Saint Martin d'Hères Cedex France ASTI Control S.A Calea Plevnei 139 Bucharest Romania

ISBN: (纸本)008045108X

an adaptive gain, smooth sliding observer-controller is developed to control n -degree of freedom rigid robotic manipulators with uncertain parameters. Furthermore, an on-line closed loop identification scheme, for time-varying parameters is proposed in order to obtain useful information despite loads, external disturbances and faults detection. in order to reduce the chattering, a smooth switching function (parameterised tangent hyperbolic function) is used instead of pure relay one, in the observer and the controller. The gains of the switching functions are adaptively updated, depending on the estimation and tracking errors, respectively. Using adaptive gains, the transient and tracking responses are improved. Simulation results with a two degree of freedom (DOF) robot manipulator are presented to show the interest of the approach. Copyright © 2005 IFAC.

关键词： Hyperbolic functions

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A Distributed Energy Management Approach for Autonomous Power Supply Systems

A Distributed Energy Management Approach for Autonomous Powe...

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IEEE International Conference on Industrial informatics (INDIN)

作者： Ingo Hegny Roland Holzer Gunnar Grabmair Alois Zoitl Franz Auinger Ewald Wahlmuller Automation and Control Institute University of Technology Vienna Vienna Austria Department for Industrial Informatics University of Applied Science Wels Austria Fronius International GmbH Thalheim bei Wels Austria

Currently applied autonomous power supplies are designed for specific energy demands and therefore rather inflexible. For an increased user friendliness, allowing attaching and detaching electrical devices without new load calculations, a flexible Power Distribution System is necessary. This can be reached by applying an Energy Management System. A concept for such a system, that is scalable by distributing it to multiple devices, is presented in this work. Reconfiguration, such as changing the load distribution algorithm, can be realized without downtime. This is possible by implementing the concept as an IEC 61499 application. A field demonstrator is set up using embedded controllers, equipped with a network interface. To perform necessary measurement and switching tasks, an interface board is developed. The desired system behavior, a stable operation of a flexible autonomous power supply system, can be achieved in the simulation on PC hardware as well as on the field demonstrator set up.

关键词： Energy management Power supplies Medical services Power system modeling IEC standards Power system management Power control Power distribution Performance evaluation Hardware

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Hybrid IMC Dead-Beat controller Design in Delta Domain

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IFAC Proceedings Volumes 2003年第18期36卷 381-386页

作者： Zs. Preitl R. Bars I. Vajk R. Haber Department of Automation and Applied Informatics Budapest University of Technology and Economics. MTA-BME Control Research Group H-1111 Budapest Goldmann Gy. tér 3. Hungary: fax : + 36-1-463-2871 Department of Plant and Process Engineering University of Applied Science Cologne Germany

The paper presents a control system design technique in delta domain for IMC (Internal Model control) structure. Also a generalised form for delta domain Dead-beat control algorithm is given, a hybrid implementation of the controller (Z-domain combined with delta domain) is presented and its architecture is compared with the pure deltadomain implementation. The effect of placing the limitations in the IMC structure is also studied. The hybrid control structure is compared with a similar Dead-beat controller in Z-domain for second and third order plants (benchmarks). An illustrative sensitivity analysis between the hybrid control system and the Z-domain system has been performed.

关键词： controller design delta domain generalised hybrid Dead-beat controller sensitivity analysis

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Adaptive sliding mode controller design for mobile robot fault tolerant control. introducing ARTEMIC.

Adaptive sliding mode controller design for mobile robot fau...

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IEEE International Workshop on Robotics in Alpe-Adria-Danube Region (RAAD)

作者： Cristian Axenie Daniela Cernega Automation and Industrial Informatics Department Computer Science Faculty Dunãrea de Jos Galati University Galati Romania Control Systems and Applied Informatics Computer Science Faculty Dunãrea de Jos Galati University Galati Romania

Current real-time applications should timely deliver synchronized data-sets, minimize latency in their response and meet their performance specifications in the presence of disturbances and faults. The adaptive features of the designed controller are present at the lower control level using specific artificial intelligence techniques. Fuzzy inference system design is the fundamental element to generate an adaptive nonlinear controller for the robot operation in the presence of disturbances and modeling inaccuracies. This paper introduces an adaptive real-time distributed control application with fault tolerance capabilities for differential wheeled mobile robots, named ARTEMIC. Specific design, development and implementation details will be provided in this paper.

关键词： Sliding mode control Programmable control Adaptive control Mobile robots Fault tolerance Robot control Delay Artificial intelligence Fuzzy control Fuzzy systems

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