Program of section Control systems

Lectures

RefNr: 14 (Review state=accepted_lecture)

Sysel, M., Pomykacz, I.:
Delta Adaptive Toolbox on Matlab Web Server
Presenters: Sysel, Martin
Abstract

The MATLABŽ Web Server enables you to create MATLAB applications that use the capabilities of the World Wide Web to send data to MATLAB for computation and to display the results in a Web browser. MATLAB Web Server applications are a combination of M files, Hypertext Markup Language (HTML), and graphics. The developed Delta Adaptive Toolbox is accessible via WWW interface. This application demonstrates properties of delta adaptive controllers and recursive least square methods.

RefNr: 15 (Review state=accepted_lecture)

Pokorny Pavel, Vasek Vladimir:
THE 2 ? LAYERS CONTROL SYSTEM IN THE TECHNOLOGY PROCESS FERMENTATION
Presenters: Pokorný, Pavel
Abstract

In chromium hide production is estimated, that in Czech Republic is engender about 3000 ton fixed processing scrap of chromium yearly. At views economic and ecological behalf manipulation these processing scrap is indicate optimal employ enzymatic hydrolysis. The enzymatic hydrolysis process is composed from three parts. The first chemical reaction proceeds in the bioreactor (fermentor) and its product is filtered during a controlled procedure and then dehydrated in vacuum vaporizer. We are creating the regulating systems in our laboratory conditions for the all three processes. In this paper there are described problems of the control in the technology process fermentation. Inorganic alkali is added to the albuminous waste mixed with water. That mixture is heated up to the temperature of 60-80°C under continuous stirring. We have to maintain the proper process conditions to keep process running quickly and efficiently. We include temperature, pH and speed of stirring among those conditions during the fermentation process. We have full implemented the two layers structure. The single technological devices are equipment with the control systems on looks of Programmable Logic Controllers (PLC) SAIA. Second level is introduction with the master system in bases personal computer, from whose proceed required strangle funds separate regulation loops, verification run single control loop and vizualization of all technological procedures.

RefNr: 22 (Review state=accepted_lecture)

Kwasniewski Janusz, Ireneusz Dominik:
NON-GRADIENT METHOD OF INCREASE TO COORDINATES IN CONTROL OF THE FOLLOW-UP SYSTEMS
Presenters: Dominik, Ireneusz
Abstract

JANUSZ KWAŚNIEWSKI, IRENEUSZ DOMINIK Department of Process Control Faculty of Mechanical Engineering and Robotics AGH - University of Science and Technology 30 Al. Mickiewicza 30-059 Krakow Poland Phone: 48-12-617-31-94, Fax: 48-12-633-91-03 email: kwa_j@uci.agh.edu.pl Presentation of the material: The paper contains a description of the algorithm which finds non-gradiently the function extremum of many variables. The implementation of the algorithm in programmable logic controller PLC was used to control the follow-up system of photovoltaic cells which follow the light source. Solar energy reaching the Earth is about 20 thousand times greater than energy generate from coil, fuel oil, gas and uranium. It is universally and inexhaustible in practice. That is why it has been gaining important lately. The photovoltaic cells can be fixed on stationary bases with the possibility to change seasonally the inclination of their angle in relation to solar radiation. Another way is to fix them in a follow-up system. The follow-up systems considerably increases ? up to 40% ? the amount of the generated electrical energy. The characteristics of the control object for different adjusts of the algorithm were presented as a proof of the superiority of the suggested method over non-follow-up control. The paper describes also a creative solution of the photovoltaic active plane fixing. Keywords: optimization, non-gradient algorithm, PLC, photovoltaic cell.

RefNr: 24 (Review state=accepted_lecture)

Jiri TUMA:
ARX Model Parameters Estimation Employing Randomised Experimental Data Influenced by Manual Control
Presenters: None.
Abstract

The paper deals with estimation of the ARX model parameters. The estimation procedure is based on experimental data logged during everyday plant operation under influence of usual random disturbances. It is assumed that the plant is under continuous manual control and it is impossible to employ any deterministic or random signal as the plant input to excite a response for evaluation the model parameters. The new approach to the parameter estimation is demonstrated on example of the blast furnace plant control. The control variable is the silicon content in hot metal and the manipulated variable is blast humidity.

RefNr: 29 (Review state=accepted_lecture)

Janusz Kwaśniewski, Agata Nawrocka:
Implementation of the fuzzy controller in PLC
Presenters: Nawrocka, Agata
Abstract

RefNr: 30 (Review state=accepted_lecture)

Marius Constantin Popescu:
THE IMPLEMENTATION OF THE PREDICTIVE CONTROL OF THE THERMIC PHENOMENON INSIDE ROOMS
Presenters: Popescu, Marius Constantin
Abstract

In this paper is presented a method of temperature adjustment inside a room in a situation when the air introduction is the effect of the superposition of a running by (artificial) diffusion and convection of the air. The predictive control with the auto-adjustment of the weighting parameter presented, could represent a modern solution to improve the functioning of the conditioning plant.

RefNr: 56 (Review state=accepted_lecture)

Pavol FEDOR and Daniela PERDUKOVÁ and Stanislav FEDOR:
FUZZY MODEL OF THE ASYNCHRONOUS MOTOR DRIVE
Presenters: Perdukova, Daniela
Abstract

Discussed in the paper is formation of the fuzzy model of an asynchronous motor that enables identifying of the motor moment based solely on an appropriately measured database of inputs and outputs. The suggested methodology is based on responses of the drive to the defined motor stator frequency steps, and describes its responses in fuzzy manner. Properties of the proposed fuzzy model have been verified by simulation in the MATLABâ program environment.

RefNr: 58 (Review state=accepted_lecture)

Florina UNGUREANU and Vasile MANTA:
THE STUDY OF PID TUNING RULES ROBUSTNESS USING GLOBAL SENSITIVITY ANALYSIS
Presenters: Ungureanu, Florina
Abstract

The main characteristics of the dynamic behaviour of the chemical processes are the time delay and the long settling time. The models commonly used for these processes are the 1st and 2nd order with time delay. The purpose of this paper is to study the robustness of the control loop for these processes, for three different tuning rules of a PID controller (popular ZN, AB ? A. Brambilla and IMC), in the cases of step set point and load disturbance. The PID controller is first optimally tuned for nominal process. Then, the simultaneous variations in large domains of the process parameters (representing uncertainty in the model process) are considered and their effects on the closed-loop performance are evaluated. The method used for evaluating the robustness of the control loop is global sensitivity analysis. The global sensitivity analysis studies the effects of the simultaneous and large variation of all the independent variables (process parameters) on the dependent variables (controlled variable or quality criteria). The mathematical description of the process parameters variation must correspond both to the model uncertainty and to their variation in time. For each parameter it is chosen a random periodic function (search curve) that must scatter the range variation of that parameter according to the probability density. For all independent variables there is a set of known periodic functions and a set of frequencies. Knowing the set of frequencies, it can be established the number of scatter points (Ns) in the range of parameters. It means that Ns is the number of parameter combinations to be evaluated. The differential equations set of the process model is solved for each parameter combination (Ns times), at any time t, and it is obtained a family of Ns that represents the range variation of the dependent variable in the case of simultaneous and large variation of all the independent variables. The robustness of the closed-loop can be evaluated on the dimensions and forms of the controlled variable or quality criteria range variation. For simulation studies a temperatura control of a process with large deadtime and time constant was chosen. It was proved that one of the difficulties with the popular ZN method is its inability to provide suitable tuning for process with large time delay. Simulation studies showed that if the controller is optimally tuned then large modelling errors or changes in process conditions are required for the closed-loop performance to become unstable, particularly if the tuning rule is AB or IMC method. Also it was been found that, for uncertainty in all process parameters, the sensitivity of the closed-loop performance as measured by ITAE or ISE is low, especially if the controller is tuned according to AB or IMC methods. Finally, a PID controller tuned with AB or IMC techniques has been found to lead to a robust stable loop for temperature control of a process with large deadtime and time constant.

RefNr: 67 (Review state=accepted_lecture)

Fakhredin Arousi, Ruth Bars, Robert Haber:
PREDICTIVE PI CONTROLLER BASED ON FIRST-ORDER DEAD TIME MODELS
Presenters: None.
Abstract

PI(D) (Proportional plus Integrating plus Derivating) control algorithms are the most accepted in the process industries. Besides, predictive algorithms are also widely used, where output information is used to calculate the actual control signal. Predictive algorithms provide good performance especially in case of significant dead time and if the reference trajectory is known. In this paper the PI control algorithm is enhanced with predictive property for first-order dead time models.

RefNr: 69 (Review state=accepted_lecture)

Zsuzsa Preitl, Ruth Bars, István Vajk, Robert Haber:
Cascade GPC with Minimax Optimal Inner Control Loop
Presenters: Preitl, Zsuzsa
Abstract

The paper proposes a cascade control structure with an internal minimax controller dedicated to reject internally located deterministic disturbances and a main generalized predictive controller loop to reject stochastic disturbances. The particular structure can be applied in power system domain, and also in other practical applications, where the plant can be separated into two parts. The proposed structure has been tested through simulation for an example.

RefNr: 70 (Review state=accepted_lecture)

Piotr Giera, Andrzej Urbaniak:
FIRE PROTECTION SYSTEM FOR INTELLIGENT OBJECTS
Presenters: Urbaniak, Andrzej
Abstract

Development of intelligent systems for complex objects demand specialised protection systems. These can be: fire protection system, security system, central alarm system, etc. Intelligent objects ought to provide total security for living and working. The fire protection system means the special kind of security. Fire protection systems are defined as any installations or equipment used for the purpose of extinguishing, attacking, preventing, limiting or giving warning of fire.The implemented present solution guarantees to put out fire in the first phase of its kindling. There are specialised sensors for different kinds of fire and material utilised for this purpose. General principles of construction and utilisation of different sensors are analysed in this paper. The proper sensors? localisation provides the possibility of quick reaction of the system in dangerous situations. There are efficient applications developed and based on specialised software as a part of intelligent protection systems. The protection software is connected with Building Management System (BMS) and its quality determines the whole intelligence system?s level [7].

RefNr: 72 (Review state=accepted_lecture)

Imre Benyó, Jenő Kovács and Urpo Kortela:
Cascade generalized predictive control with control increment constraints
Presenters: Benyó, Imre
Abstract

The paper presents a cascade generalised predictive controller. Contrary to the traditional cascade control structures, in this case only one controller is applied, but the predictor is implemented in a cascade structure. Simulation results are presented to show the promising behaviour of the proposed algorithm in case of control increment limitation.

RefNr: 78 (Review state=accepted_lecture)

A. Barta, R. Bars, I. Vajk, Zs. Preitl:
PRACTICAL CONTROLLER DESIGN CONSIDERING INPUT SATURATION
Presenters: Barta, András
Abstract

Control systems having control input saturation are of special practical interest. A new method is suggested where the control algorithm is transformed to a feedback structure. The controller is realized by a dynamic feedback of a static saturation element. The control structure provides an anti-windup realisation for any control algorithm designed in a series feedback control loop. The performance of the control structure with saturation is demonstrated for a continuous PID controller. An algorithm is presented that can be directly implemented in a microcontroller or digital signal processor.

RefNr: 87 (Review state=accepted_lecture)

Dusan Krokavec, Anna Filasova:
Integral Extension in Dead-beat Control
Presenters: Lawrynowicz, Anna; Krokavec, Dusan
Abstract

The purpose of the paper is to present a method for closed-loop pole assignment in feedback control for state-feedback controllers with integral action extension. The control canonical transform matrix is proposed to obtain the essential characteristic polynomial of the state-feedback control for desired closed-loop characteristic polynomial with such an extended controller. The general form of the closed-loop characteristic polynomial of extended control systems was derived using the block-matrix properties. The proposed formula entitles design rules to obtain the essential characteristic polynomial of the state-feedback control for desired characteristic polynomial of the control system with integral action extension. The design results in the assignment of the poles of the closed-loop transfer function to any desired locations, where generalized dead-beat algorithms for linear discrete-time systems is presented as an example.

RefNr: 88 (Review state=accepted_lecture)

Dan Selisteanu, Emil Petre, Dorin Popescu:
An Adaptive Control Strategy for a Biomethanation Depollution Process
Presenters: Selisteanu, Dan
Abstract

In this paper a nonlinear adaptive control strategy is developed for a depollution bioprocess, which is a wastewater biodegradation with production of methane gas that takes place inside a Continuously Stirred Tank Bioreactor. A dynamical feedback controller, which ensures output stabilization via exact linearization, is obtained by means of adaptive control ideas. A high gain estimation strategy is also used for identification of the unknown kinetics of the bioprocess. Computer simulations are included.

RefNr: 90 (Review state=accepted_lecture)

Eugen Bobasu:
Nonlinear Algorithms for the Control of a Handling Crane
Presenters: Bobasu, Eugen
Abstract

This paper presents some nonlinear control techniques for the control of a handling crane. The nonlinear model of the handling crane is widely analyzed and an exactly linearizing feedback control law is designed. This nonlinear control law, aggregated with our nonlinear system achieves input-output linearization. Several computer simulations are included to demonstrate some theoretical aspects and the performances of the nonlinear controlled system.

RefNr: 91 (Review state=accepted_lecture)

Varga Ádám, Lantos Béla:
Predictive control of nonlinear systems
Presenters: Varga, Ádám
Abstract

The paper deals with model predictive control of nonlinear mechatronical systems along known reference path. It generalizes the state space predictive control algorithm of linear time invariant (LTI) systems to linearized time variant (LTV) systems. An algorithm is presented, which calculates the LTV model online from the nonlinear model along the reference trajectory. The LTV is then used in the framework of the predictive control to find the optimal control in closed analytical form without using online optimum search in the moving horizon. After MATLAB-based simulation results of the algorithm, successful test experiments were performed for the predictive control of a real inverted pendulum system, both in the swinging up and upper stabilization phases.

RefNr: 92 (Review state=accepted_lecture)

Emil Petre, Dan Selisteanu:
ADAPTIVE CONTROL OF A CLASS OF WASTEWATER TREATMENT PROCESSES
Presenters: Petre, Emil
Abstract

This paper presents the design and the analysis of a multivariable adaptive nonlinear control strategy for a class of wastewater treatment processes that are carried out in recycle bioreactors. The controller design is based on the input-output linearizing technique. The resulted controller is applied in depollution control problem in the case of the activated sludge process for which dynamical kinetics are strongly nonlinear and not exactly known. Simulation results are included to evaluate the performances of the designed controller.

RefNr: 105 (Review state=accepted_lecture)

András Kelemen, Nimród Kutasi and Szabolcs Mátyási:
Control Strategies for a Voltage-Source Induction Heating Inverter with Hybrid LLC Resonant Load
Presenters: None.
Abstract

This paper represents the continuation of [6](A.Kelemen, I. Szekely, N.Kutasi, and C.Gaspar, "Minimum Transistor Loss Control of an Induction Heating Inverter with LLC Resonant Load", In INES Cluj-Napoca, Romania, 2004, pp 509-513.). Its aim is to present further investigation of intelligent control methods that allow increase of operation frequency in case of a voltage source induction heating inverter. Minimization of transistor turn-off current is obtained by means of LLC load resonance, while the inverter legs are controlled asymmetrically, in discontinuous current mode (ADCM). Simulation and experimental results are presented.

RefNr: 107 (Review state=accepted_lecture)

Karel PERUTKA, Vladimir BOBAL, Martin TOMASTIK:
DECENTRALIZED SUBOPTIMAL CONTINUOUS-TIME LQ INTERNAL MODEL CONTROL
Presenters: Perutka, Karel
Abstract

Suboptimal LQ (linear quadratic) control has been popular very much because of its very good results in several tasks of control. It allows us to implement it even on unstable systems which it stabilizes. Adaptation enlarges the area of the usage especially in the case when standard controllers with fixed parameters are unsatisfactory. The choice of appropriate identification algorithm is also important, the instrumental variable method is used. In this paper, the main attention is dedicated to the usage of internal model approach instead of classical feedback control strategy. This algorithm has been verified by simulation in MATLAB program on TITO (two input two output) systems.

RefNr: 108 (Review state=accepted_lecture)

Osvald Modrlák:
A COMPLEX LABORATRY TASK ?POSITION CONTROL WITH A CENTRIFUGAL CONTROL UNIT? FOR CONTROL EDUCATION LABORATORY
Presenters: Modrlák, Osvald
Abstract

In this paper we introduce a new laboratory task that extends the portfolio of Control laboratory activities by complex approach to the Automatic Control. The experiment consists of the hardware part and tasks related to the plant analysis and controller synthesis. This arrangement enables students for carrying out the verification of mathematical models with the real plant, identification of the plant in a working point based on the measurement. It also enables for PID, state and fuzzy controllers synthesis supported by MATLAB. Students can investigate behavior of the designed feedback control in real time.

RefNr: 112 (Review state=accepted_lecture)

Tamás BÁKAI:
NEW METHODS AND TOOLS FOR SUPPORTING THE LOGICAL CONTROL DESIGN OF MACHINE LINES IN THE MANUFACTURING INDUSTRY
Presenters: Bákai, Tamás
Abstract

Customized mass production is a growing tendency in the field of manufacturing industry. It means that adjustable machine lines become more common both in part manufacturing and in assembly. On the manufacturing lines, numerous machines work together in a strictly synchronized way. The control of these machine lines requires widened automation processes, where PLC equipment works in parallel, connected to each other by an industrial network. In practice the hierarchically based control modelling systems become more common. This paper presents some common modelling languages used for supporting a PLC application development process in the different hiearachical levels and introduces platform independent development tools which integrate the benefits of these modelling languages and allows the engineer to choose between the alternatives.

RefNr: 118 (Review state=accepted_lecture)

Renata Wagnerová:
ROBUST CONTROL DESIGN FOR HOT-AIR AGGREGATE
Presenters: None.
Abstract

The paper deals with robust control design for nonlinear control systems. The described robust control algorithms are based on state variables aggregation method, which is suitable for synthesis of relatively wide class nonlinear system. The described control algorithms were applied to temperature control of the hot-air aggregate, which were made as a laboratory models on Department of Automatic Control and Instrumentation. The designed control algorithms were verified by using computer simulations and also directly on laboratory model. The results achieved confirm suitable technical means and synthesis by using sliding modes for nonlinear control tasks.

RefNr: 119 (Review state=accepted_lecture)

Dan Popescu:
Robust Controller Design for Delay Systems By Frequency Approximation Techniques
Presenters: Popescu, Dan
Abstract

In this paper, the problem of robust controller design is approached for a class of systems with time delay and additive unstructured uncertainty. We use a finite dimensional approximation of delay system, computed using the Laguerre formula. To design the robust controller, we use a reduced order model of the finite dimensional approximation of the delay system, and the approximation error is added to the initial unstructured uncertainty. Then, the two-parameter compensator technique is used to achieve the requirements of robust stability and optimal model matching. Simulation results are included to demonstrate the performance of the compensator.

RefNr: 123 (Review state=accepted_lecture)

Zbigniew MIKOŚ, Grzegorz WRÓBEL, Grzegorz HAYDUK, Henryk ZYGMUNT, Paweł KWASNOWSKI, Marcin JACHIMSKI:
USING ISaGRAF ENVIRONMENT FOR STONE-CRUSHING LINE CONTROL
Presenters: Hayduk, Grzegorz
Abstract

The paper presents distributed control system of stone-crushing line and an example application of ISaGRAF environment for designing, testing and commissioning the system. The ISaGRAF considerably decreased time needed for design and coding the control algorithm. In addition, commissioning time was minimized thanks to simulation feature, which allows testing even large parts of control program.

RefNr: 134 (Review state=accepted_lecture)

Mehmet Bozcaa Ata Muğanb Hakan Temeltaşc:
INTEGRATED OPTIMIZATION OF STRUCTURES AND LQR CONTROLLER
Presenters: Bozca, Mehmet
Abstract

In this study, integrated optimum design of structures and control systems is studied. The structures are modeled by the use of finite element methods, and the controllers are designed by the use of linear quadratic regulator (LQR) formulation. The structures and controllers are optimized simultaneously and successively. It is shown that simultaneous optimization of structures and controllers by using LQR formulations can be achieved by an equivalent decoupled optimization problem. Decoupled optimization of structures and controllers has certain advantages, especially for structures having large degrees-of-freedom (DOF). Then, simultaneous and successive optimization of structures and controllers are applied to a beam structure and its controller. It is concluded that successive optimization approach to integrated LQR design problem yields the global minimum much faster than the simultaneous optimization approach.

RefNr: 136 (Review state=accepted_lecture)

Milu?e Vítečková&Antonín Víteček:
FAST ANALOG AND DIGITAL PI AND PID CONTROLLERS TUNING FOR PROPORTIONAL APERIODIC PLANTS WITH TIME DELAY
Presenters: None.
Abstract

The paper deals with fast analog and digital PI and PID controllers tuning. There Simple formulas for the determination of the controller adjustable parameter values are here. The derived formulas go out from the desired model method and they enable controller tuning for proportional aperiodic plants with a time delay for the desired relative overshoot in a range form 0 to 50  with the average accuracy 5 .

RefNr: 145 (Review state=accepted_lecture)

Karol KOSTÚR, Ján KAČUR:
OPTIMAL CONTROL OF MIXTURE GAS COMBUSTION
Presenters: None.
Abstract

A efficiency of big heating aggregates depends on the optimal combustion process mixed gas – combustion air. Usually, the volume flows of heating gas are measured, but volume flows of air are unknown. In the article is designed a method, which is partially verified for optimal control of gas combustion. These two solutions were designed: - based on measured temperature of combustion products - based on combustion model The first variant rises from analysis of measured data from combustion process, second variant presents model that rise from the combustion equations. The problem has been verified on coke – oven battery.

RefNr: 171 (Review state=accepted_lecture)

István Pintér, Iván Lajtai:
MRAC CONTROLLED POSITIONING SYSTEM USING DIGITAL PLC OUTPUTS
Presenters: Pintér, István
Abstract

The development of model reference adaptive control (MRAC) algorithms and the system-integration of MRAC-based devices have opened new dimensions in practical control engineering. Recently the leading PLC manufacturers have made their own PLC-controllable servo amplifier-servomotor systems commercially available. Nowadays even the simplest compact PLCs have frequency outputs which can be used for setting up digital reference signals by modifying the impulse number and the repetition frequency. Using the instruction set of the PLC and after proper parametrization of the MRAC-based servo-amplifier-servomotor parts it is not difficult to fit together a positioning servo system at will.

RefNr: 180 (Review state=accepted_lecture)

Modrlák O., Volejník O.:
EXPERIENCES IN CREATING AND USING OF E-LABORATORY IN AUTOMATIC CONTROL
Presenters: Modrlák, Osvald
Abstract

This paper describes same experiences with using an e-laboratory for remote measure and control for undergraduate students. Four control plants with industrial instrumentation compose the e-laboratory. An industrial commercial system is applied for remote control and visualisation. Students tasks and the some achieved results and problems are discussed.

RefNr: 188 (Review state=accepted_lecture)

JÓNAP K., SUBERT J.:
Function Blocks and Control in the Field
Presenters: Jónap, Károly
Abstract

Fieldbus technology as implemented in today?s FOUNDATION Fieldbus devices offers substantial advantages over standard 4-20 mA technology. These ranges from the possibility of transmitting more than one variable together with the associated diagnosis information thorough device configuration from a central workstation to use of field-based control. These functions are defined in the Fieldbus Foundation Specifications. Foundation Fieldbus (FF) is the state-of-the-art technology for process control, bringing networking technologies down to the field devices in the plant floor. All FF field devices (transmitters, valve actuators, etc.) are powered with function blocks that make them controllers. The better and more powerful the function blocks are the better is the field device. Control in the field is often discussed when we talking about Foundation Fieldbus. But does Fieldbus devices meet application requirements? Can they control in the field improve control performance? And what about the robustness of data communication? Important questions to be answered, before making use of these new controllers. This presentation will show the main function blocks available in the market today and how can we use them (basic blocks, control blocks, user defined blocks) in industry.

RefNr: 191 (Review state=accepted_lecture)

Stefan PREITL, Radu-Emil PRECUP, Zsuzsa PREITL:
TWO DEGREE OF FREEDOM TAKAGI-SUGENO FUZZY CONTROLLERS IN TRAJECTORY TRACKING
Presenters: Preitl, István
Abstract

Abstract: The paper presents structures and a development method for two degree of freedom Takagi-Sugeno fuzzy controllers. The proposed controller structures are dedicated to a low order plant, specific to servo systems. The design relations are based on the fact that, in some certain conditions, fuzzy controllers and linear development methods are applicable in this situation. The presentation points out that the proposed two degree of freedom (2 DOF) fuzzy controllers can be applied in robot control and can ensure good control system performance with respect to the reference input and disturbance actions. Key words: Takagi-Sugeno fuzzy controllers, robot control, PI controllers, PID controllers, servo systems.

RefNr: 196 (Review state=accepted_lecture)

Zsolt Csaba Johanyák, Szilveszter Kovács:
SIMILARITY MEASUREMENT IN INTERPOLATIVE FUZZY REASONING
Presenters: Johanyák, Zsolt Csaba
Abstract

Systems based on interpolative fuzzy reasoning work with sparse rule bases. In case of some input values the system should approximate the output value. Carrying out this task depends on the right selection of the suitable fuzzy similarity measure. The goal of this paper is presenting two of such measures, which are also applied in some interpolation based fuzzy reasoning methods.

RefNr: 199 (Review state=accepted_lecture)

Jaroslav Balátě, Franti?ek Hru?ka, Bronislav Chramcov, Pavel Navrátil:
RISK IN THE FIELD OF DESIGN OF DISTRICT HEATING SYSTEM CONTROL
Presenters: Balátě, Jaroslav
Abstract

The District Heating Systems (DHS) are being developed in according with the growth of large European cities. These systems are formed by enlarging networks of heat distribution from heat sources to heat consumers and simultaneously by connecting gradually built new heat sources. The DHS operation consists in optimum operation of the output of heat sources and in operation of heat transportation+distribution and heat consumption. The aim is to create the new unconventional operational methods for complex operation of technological string "heat production - transportation + distribution - consumption" of heat supply systems with hot water or (and) steam supply circle networks. Heat consumption will be intended in the way of convection and radiation heating including their combination and of cooling systems. The aim of complex access to the solution of new operation way should be decreasing the cost of consumed heat unit and increasing the environment protection. We would like to explain our experience by the realisation of proposal in the frame of 5th Framework Programme in the field of District Heating System Control.

RefNr: 202 (Review state=accepted_lecture)

Va?ek, V., Janáčová, D., Hru?ka, F., Prokop, R.:
Time Delay Education Modell
Presenters: Vasek, Vladimir
Abstract

In the range of the Grant Agency CR project new process models for laboratories of the technical universities were solved. In the Tomas Bata University was proposed new model for presentation of the systems with time delay. Model of a heat-interchanging system serves for training identification, analysis, synthesis and real-time control time delay systems. The time delay is realised by measuring the temperature of the media at several place?sin the interconnecting pipeline. Maximal value of the time delay is ten minutes.In the contribution will be described this physical model, the identification results and the mathematical model.

RefNr: 207 (Review state=accepted_lecture)

Tomasz Kuźmierowski, Franciszek Siemianiako:
CONTROL SYSTEM OF THE MECHATRONICS AEROSTATIC PLANAR DRIVE
Presenters: None.
Abstract

Article presents construction and control system of the mechatronics aerostatic planar drive made of Ruchservomotor with internal measuring system of position based on Hall sensor. It was described construction of collector card UC48 the co-operating from presented drive and talk over the entrance signal and algorithms with high and low-end control commands

RefNr: 211 (Review state=accepted_lecture)

Attila Kovacs and Gusztav Szecso:
Automation of Gas Heated Furnace Using Ethernet Based Analog Input and Controller Modules
Presenters: Szecso, Gusztav
Abstract

Featuring the gas heated furnace and the Ethernet based modules. Implementing two kinds of decentralized instrumentation structure: just using DAS module or system realization by DAS and intelligent PID controller modules. Realizing communication system and protocol (simple ASCII and MODBUS) handlers inside GENI software. Timing problems: the communication and tasks operational delays. Protocol problems: virtual communication channel open and close conflicts, handler implementation. Designing control system structure: feedback and feed-forward loops. Implementing cascade, feed-forward and ratio control loops and their algorithms using PIDCAD software. Comparing closed-loop control results with simulation ones. Evaluating the results obtained, improving control quality using real-time optimization.

RefNr: 218 (Review state=accepted_lecture)

Katalin Gősi, András Széll:
DESIGN AND SIMULATION OF AIRCRAFT CONTROLS WITH 3D ENVIRONMENT OPTIONS
Presenters: Széll, András; Gősi, Katalin
Abstract

The aim of the present work was to develop a system running on two computers, one of which carrying out the calculations necessary for the control and the simulation, the other one setting the parameters and performing graphic and 3D visualization. Realization of the project was done in a MATLAB environment, using Simulink. Some of the state-space planning method was realized by using the physical model of an F16 aircraft [2]. Only the control designed by the LQG/LTR method will be shown, further solutions can be found in [5].

RefNr: 225 (Review state=accepted_lecture)

Janusz KWAZNIEWSKI and Agata NAWROCKA:
IMPLEMENTATION OF THE FUZZY LOGIC CONTROLLER IN PLC
Presenters: None.
Abstract

Fuzzy logic controllers (FLC) have succeeded in many control problems that the conventional control theories have difficulties to deal with. As control plant the hydrostatic transmission was chosen. The control by using the hydraulic drive is the time variant process, consequential with inconstancy parameters of hydraulic liquid (example: kinematic viscosity, compressibility, thickness). The efficiency of pump control is realized by use electrohydraulic servo - system, which has the non-linear characteristic. For that reason advanced control was proposed. In this paper the fuzzy logic controller implemented in PLC is described. This paper consists of three parts. First it is short introduction with generally information about fuzzy control. In the second part the idea of fuzzy controller in PLC is described and the results of different laboratory tests witch chosen controller in last one.

RefNr: 226 (Review state=accepted_lecture)

Ioan Iov INCZE, Maria IMECS, Csaba SZABÓ, József VÁSÁRHELYI:
ORIENTATION-FIELD IDENTIFICATION IN ASYNCHRONOUS MOTOR DRIVE SYSTEMS
Presenters: Imecs, Maria; Ioan Iov, Incze
Abstract

The paper deals with the identification of the orientation flux for a vector controlled asynchronous motor drives. The stator flux is obtained by integration of the voltage equation. An enhanced, closed-loop integration algorithm, based on orthogonality detection between the input and output signals was simulated and used in implemented stator-flux computation. A new representation method for investigation of the dynamic and static behavior of the integrator is proposed. Experimental results are presented, too.

RefNr: 242 (Review state=accepted_lecture)

JarosBaw SMOCZEK, Janusz SZPYTKOKO, Mateusz TEKIELAK, Artur KOCERBA:
CRANE CONTROL METHODS INFLUENCE ON QUALITY TRANSPORTATION TASK OF THE DEVICE
Presenters: None.
Abstract

Technical state and quality of transportation tasks realized by cranes have significant part in automated industrial systems. Improving working quality can be achieve by employing new application in those devices in driving mechanisms and elaborating control solution that can be put into practice. In the paper control methods and driving solutions used in cranes mechanisms at present are presented as well as results of researches conducted on device working in workshop. The control system based on fuzzy logic algorithm realized by PLC controller and PC computer enables monitoring transportation process is shown as example that could be applied as industrial application.

Posters

RefNr: 241 (Review state=accepted_poster)

Mátyás KISS, János CZEKKEL, István DALMI, István GYURICZA, András SULYOK:
SOME PROBLEMS AT THE CONTROL OF COOLING OF HOT ROLLED STRIP PRODUCTS
Abstract

The temperature control during cooling of the strip is a very important task in the wide strip rolling plants. Similarly the controlling of the temperatures at the finishing of the rolling respectively at the beginning of the coiling are very important. The paper presents investigations of such a hot strip rolling plants, where the thickness ( 2&12 mm ), the wide and the quality are extremely varying.