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Geometrical Method for Increasing Precision of Machine Building Parts

Procedia Engineering 2016年 149卷 576-580页

作者： Pavol Božek Aleksander Lozkin Alexey Gorbushin Slovak University of Technology Faculty of Materials Science and Technology Institute of Applied Informatics Automation and Mechatronics J. Bottu 25 Trnava 91724 Slovakia Department of Software M. T. Kalashnikov Izhevsk State Technical University Studencheskaya st. 7 IIzhevsk 426069 Russia Department of Automated Data Processing and Control Systems Glazov branch of Kalashnikov Izhevsk State Technical University Kirova street 36 427622 Glazov Russia

Calculation of complex curves with high accuracy is challenging. The curve is approximated by segments of straight lines and carried out smoothing. A new method of analytic geometry to calculate the trajectories of mechatronic systems and CAD/CAM is offered. The theoretical basis of the method is symmetries in the Euclidean plane. The method can accurately calculate the trajectory for the centrally symmetric conic sections and, in some cases, arbitrary differentiable planar curves. The method gives an accurate analytical solution without using radicals. This allows you to find the formulaic dependencies for further calculations. The existence of Lissajous figures allows assuming the presence of a universal method of calculation of complex trajectories based on planar differentiable curves. Some examples of the design of the kinematic mechanisms are presents additionally.

关键词： mechatronic systems calculation of trajectory symmetries arbitrary curves.

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Modelling and control of Raw Hide Desalting Process

Modelling and Control of Raw Hide Desalting Process

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2015 International Conference on Environmental Science and Energy Engineering(ICESEE 2015)

作者： Vladimir VASEK Dagmar JANACOVA Karel KOLOMAZNIK Pavel MOKREJS Department of Automation and Control Engineering Faculty of Applied Informatics Faculty of Technology Tomas Bata University in Zlín

The contribution deals with optimizing of desalting process during soaking and application of automatic control via microcomputer technology in leather manufacturing industry on the base mathematics deterministic diffusion model describing desalting *** of raw hides comprises a series of particular processes through which raw hide is progressively transformed into the *** a combination of mathematical modelling and laboratory testing by automatic control system we search an optimal procedure for desalting with regard to ecological and economic *** this paper we describe testing of desalting in the flow systems with flow rate automatic *** obtained results confirm the elimination of concentration shocks which cause the collapse of the surface layer texture of cured hide.

关键词： Desalting Raw hide Tannery technology Mathematical model Measuring and control microcomputer system Simulation

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Dynamics of DFIG controlled by Rotor Side Converter in wind energy

Dynamics of DFIG controlled by Rotor Side Converter in wind ...

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International Youth Conference on Energetics (IYCE)

作者： Péter Stumpf József Berei István Nagy István Vajk Department of Automation and Applied Informatics Budapest University of Technology and Economics Budapest MTA-BME Control Engineering Research Group

The paper is concern with the investigation of control of Doubly Fed Induction Generator (DFIG) carried out by Rotor Side Converter (RSC) applied in wind energy harvest. Throughout the paper the principle of Stator Flux Oriented Vector control (SFOVC) is applied. In the first part of the paper a general slip-torque relation is derived with three torque components: one component is derived by the stator voltage, the other one by the d component and the third one by the q component of the rotor voltage space vector. In the second part of the paper, the dynamic behavior of the algorithm controlling the stator active and reactive power is simulated in open loop and closed loop.

关键词： Rotors Torque Stators Turbines Mathematical model Microgrids Transient response

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State space control of quadratic boost converter using LQR and LQG approaches

State space control of quadratic boost converter using LQR a...

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International Aegean Conference on Electrical Machines and Power Electronics, ACEMP

作者： Bence Kurucsó Alfréd Peschka Péter Stumpf István Nagy István Vajk Department of Automation and Applied Informatics Budapest University of Technology and Economics MTA-BME Control Engineering Research Group Budapest Hungary

The systematic design of a Linear Quadratic Regulator (LQR) state-feedback controller with an integral action is presented for a quadratic DC/DC boost converter topology. The weighting factors are selected with respect to energy considerations. By using a Kalman Filter for both filtering and state estimation purpose a Linear Quadratic Gaussian (LQG) controller is obtained. For the proper operation of the LQG controller an average state-space model of the quadratic boost converter with non ideal elements is introduced. Detailed simulation study in the discrete time-domain is presented demonstrating the robustness of both LQR and LQG. Laboratory tests results are shown for LQR.

关键词： Switches Mathematical model Steady-state Voltage control Aerospace electronics Matrix converters

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Modelling of Raw Hide One-Stage Washing Process

Modelling of Raw Hide One-Stage Washing Process

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2015 International Conference on Environmental Science and Energy Engineering(ICESEE 2015)

作者： Dagmar JANACOVA Karel KOLOMAZNIK Pavel MOKREJS Vladimir VASEK Ondrej LISKA Antonin BLAHA Miloslav FIALKA Department of Automation and Control Engineering Faculty of Applied Informatics Faculty of Technology Tomas Bata University in Zlín Technical University of Ko?ice

In the last years increased application of automatic control systems in tannery *** system consists mostly in the control of equipment and metering of chemicals,according to a predetermined programme.A qualitatively higher degree of automatic control is the application of closed loop control,involving active interferences based on measured parameters of the process in *** of the ways how to achieve this is adequate technical equipment and application of control algorithms,derived from the mathematical model of the given process and his physical *** first task was the design of such *** case of raw hide washing such models are of diffusion type,describing protective component transport or models describing protective solution on the *** solution and practical verification was made under laboratory and industrial *** design or control algorithms should equally give answer to the question what is the main purpose of *** could be *** of satisfactory good quality semiproduct,environmental protection,minimization of operating costs because reduced water consumption cannot compensate the long operation time connected with power *** focused on part of soaking process—washing.

关键词： Washing Raw hide Mathematical modelling Optimization Process control

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Multi-source information fusion model in rule-based Gaussian-shaped fuzzy control inference system incorporating Gaussian density function

Multi-source information fusion model in rule-based Gaussian...

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作者： Li, Zairan He, Ting Cao, Luying Wu, Tunhua McCauley, Pamela Balas, Valentina E. Shi, Fuqian Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University Tianjin China Wenzhou Vocational and Technical College Wenzhou China College of Information and Engineering Wenzhou Medical University Wenzhou325035 China Department of Industrial Engineering and Management Systems University of Central Florida OrlandoFL United States Department of Automation and Applied Informatics Aurel Vlaicu University of Arad Romania

An increasing number of applications require the integration of data from various disciplines, which leads to problems with the fusion of multi-source information. In this paper, a special information structure formalized in terms of three indices (the central presentation, population or scale, and density function) is proposed. Single and mixed Gaussian models are used for single source information and their fusion results, and a parameter estimation method is also introduced. Furthermore, fuzzy similarity computing is developed for solving the fuzzy implications under a Mamdani model and a Gaussian-shaped density function. Finally, an improved rule-based Gaussian-shaped fuzzy control inference system is proposed in combination with a nonlinear conjugate gradient and a Takagi-Sugeno (T-S) model, which demonstrated the effectiveness of the proposed method as compared to other fuzzy inference systems. © 2015 - IOS Press and the authors. All rights reserved.

关键词： Fuzzy control

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Mathematic model of heat transport in materials during cutting process 26

Mathematic model of heat transport in materials during cutti...

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26th DAAAM International Symposium on Intelligent Manufacturing and automation, DAAAM 2015

作者： Janacova, Dagmar Mokrejs, Pavel Vasek, Vladimir Drga, Rudolf Liska, Ondrej Krenek, Jiri Department of Automatic and Control Engineering Faculty of Applied Informatics Tomas Bata University in Zlin Czech Republic Department of Polymer Engineering Faculty of Technology Tomas Bata University in Zlin Nám. T. G. Masaryka 5555 Zlín760 01 Czech Republic Department of Automation Control and Human Machine Interaction Faculty of Mechanical Engineering Technical University of Košice Letná 9 Košice042 00 Slovakia

ISBN: (纸本)9783902734075

Printed circuit boards (PCBs) that represent a significant part of electronic waste are potential sources of material and energy. In the paper we focused on study of a cutting as an alternative method of conductive ways separating from plastic board as one of stages of the printed circuit board recycling procedure. High velocity of cutting belt is connected with enormous heat production. Due to the generation of high temperatures may lead to caking of separated components of metal and plastic materials. For this reason we formulated mathematic model of the cutting process and on the base we can determine of temperature fields in PCB materials during cutting. Of courses of them we can calculate the heat intensity and consequently the critical velocity of cut ting belt without damage of PCB materials.

关键词： Printed circuit boards

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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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Extremum seeking control for an anaerobic digestion process

Extremum seeking control for an anaerobic digestion process

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

作者： Sergiu Caraman George Ifrim Emil Ceangă Marian Barbu Mariana Titica Radu-Emil Precup Department of Automatic Control and Electrical Engineering “Dunarea de Jos” University of Galati Galati Romania Universite de Nantes CNRS GEPEA UMR-CNR 6144 Bd. de l'Universite France Department of Automation and Applied Informatics Politehnica University of Timisoara Timisoara Romania

The paper deals with the optimal control (extremum seeking algorithm) of an anaerobic digestion process. It uses a simplified version of the anaerobic digester model. Three cases of optimization criteria are considered taking into account the quality variable of the process: 1. the methane quantity in gaseous form, 2. the level of pollutants (it is expressed as the difference between the influent substrate and the substrate quantities accumulated in the digester) and 3. an aggregated quality variable resulted from the combination of the first two criteria. The analysis of anaerobic digestion process static characteristics shows that each characteristic reaches a point of maximum. The extremum seeking algorithm aims to keep the operating point in this point of maximum. The simulation results confirm the good behaviour of the extremum seeking algorithm.

关键词： Mathematical model Process control Biological system modeling Microorganisms Carbon dioxide Optimization Substrates

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Improving dynamics of vector controlled IM drive by resampling SVM under low frequency ratio

Improving dynamics of vector controlled IM drive by resampli...

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International Conference on Electrical Machines, ICEM

作者： Péter Stumpf Rafael K. Járdán István Nagy István Vajk Department of Automation and Applied Informatics Budapest University of Technology and Economics MTA-BME Control Engineering Research Group Budapest Hungary

ISBN: (纸本)9781479943883

Field Oriented control (FOC) technique is one of the most frequently applied algorithm to control the torque and the speed of a three-phase electric drive. The paper focuses on high speed or high-pole count motor FOC drives when both the sampling over reference frequency ratio F and the carrier over reference frequency m f is low. The paper presents that the stability range of a speed sensor-less FOC motor drive can be extended by recalculating the reference signal of the Space Vector Modulation algorithm at the negative peak of the carrier signal as well by approximating the rotor flux angle change over one half carrier period. The result was verified by computer simulations and laboratory measurements.

关键词： Support vector machines Resistors Torque Stators Current measurement Pulse width modulation Rotors

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