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Carpathian Control Conference (ICCC), 2011 12th International

Date 25-28 May 2011

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Displaying Results 1 - 25 of 100
  • [Front matter]

    Publication Year: 2011 , Page(s): i - xii
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    Freely Available from IEEE
  • Software application for GPS devices using Google Maps

    Publication Year: 2011 , Page(s): 1 - 5
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (901 KB) |  | HTML iconHTML  

    The application for GPS devices expand the use of GPS devices. It is very simply designed and has intuitive operation and environment. The big advantage is an on-line access to the application. The basic characteristic of similar applications is planning and rendering the route which was taken. Therefore, this application provides both of these functions. Route from point A to point B might be planned. It is also possible to add other via points. It can also render the route already traveled. Rendering has been designed to allow a different number of ways. Either from own Web source, or uploaded by a waypoint file. In order to upload waypoints files into the application, user was allowed to create his own account and to manage his files. The most valuable feature is support for multiple formats. This feature is only available in few applications. It is possible to use five basic formats of GPS devices. Combining all of these features is currently the most popular choice. Since the application is available online, most of it is programmed in the programming language PHP and JavaScript. The features of Ajax were also used and Cake PHP framework should facilitate the work. MySQL database is used as a data warehouse. View full abstract»

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  • Identification of model parameters and control of heater on laboratory object PCT40

    Publication Year: 2011 , Page(s): 6 - 9
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (607 KB) |  | HTML iconHTML  

    This paper deals with the parameters identification of heater model, which is a part of the laboratory object Armfield PCT40. Dynamical behavior of the heater is described by delay differential equation and equation parameters are obtained via classical identification technique implemented in Matlab Identification Toolbox and also with using a graphical method in time domain. The obtained models can be used for design and implementation of control system for temperature control of the heater in object PCT40. A simple bang-bang control algorithm is implemented in Matlab/Simulink to control of water temperature. Obtained results are presented as well. The fractional-order control strategy is proposed as an idea for further work. View full abstract»

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  • Using .NET technology for process control and monitoring

    Publication Year: 2011 , Page(s): 10 - 15
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (909 KB) |  | HTML iconHTML  

    The paper describes the typical area of specific research of our department and that is the software implementation for support the monitoring and control of technological processes. It presents a modern robust software was created to support control and monitoring of the experimental models have been developed within the multiunivesity project GACR in recent years and successfully used in the teaching fields of automation in laboratories of universities, which we in the inter-university cooperation verified many times. In addition, there is the essence of creation described software using new software tools and technologies used in many of our projects. New software at .NET technology uses dynamic compilation during the program execution, so you can add the new equipment to the application and write new program code for control models. View full abstract»

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  • Management of water pipeline networks supported by hydraulic models and information systems

    Publication Year: 2011 , Page(s): 16 - 21
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (226 KB) |  | HTML iconHTML  

    This report presents a selection of exploitation problems which can be effectively solved by water network modellers. It includes a list of worldwide-available software dedicated to modeling water distribution systems. This type of software can serve as the key tool supporting management and water pipe networks' control. Based on a few samples of real-life problems this report points out recent functionalities and methods. Moreover, there are presented some new trends and main problems in water network modeling. View full abstract»

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  • Modeling and interpretation of new solutions in problem solving

    Publication Year: 2011 , Page(s): 22 - 27
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (249 KB) |  | HTML iconHTML  

    The paper discusses relations between so called Interpretation Space (IS), Sign Model (SM) and their Connection. The principal importance has the process of the Interpretation that assigns the semantic contents (in IS) to signs and sign formation (from SM). The fact that the interpretation mapping from lower to higher level of IS is non constructible induces the situation of "bottom-up emergence” and it appears in most discoveries of new solutions of engineering problems. The paper proposes new method how to avoid this principal obstacle. The method is illustrated by example from a real monitoring system. View full abstract»

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  • Dynamic simulation model of PAM based antagonistic actuator

    Publication Year: 2011 , Page(s): 28 - 31
    Cited by:  Papers (8)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (207 KB) |  | HTML iconHTML  

    A dynamic model of the system consisting of four ON/OFF solenoid valves and two pneumatic artificial muscles in antagonistic connection (PAM based actuator) was designed. This model regards with different dynamic characteristics of the pneumatic artificial muscle by inflation and deflation of compressed air into or from muscle. The model was created in Matlab's Simulink environment. View full abstract»

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  • Measurement-to-track assignment methods in target tracking

    Publication Year: 2011 , Page(s): 32 - 36
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (304 KB) |  | HTML iconHTML  

    Object tracking is a problem of obtaining usually positional and motional information about the object. The observation is usually in the form of a picture, radar or sonar image. A key element of the tracking problem is to estimate a (non-measurable) state of a stochastic system based on corrupted measurements. This problem is well treated in literature. If the objective is tracking multiple objects simultaneously or if a false detection appears due to a clutter, in addition it is necessary to solve the problem of measurement-to-track assignment. A usual procedure is to assign measurements to objects based on a prediction of their location. There are computationally cheap measurement-to-track assignment methods based on minimizing a statistical distance, which include the well-known strongest or nearest neighbor methods. On the other hand, there is the multiple hypothesis tracking method providing high quality of multiple target assignment. Unfortunately its computational costs are unbearable. The probabilistic data association method represents a compromise between quality and computational costs. The paper aims at introducing some measurement-to-track assignment methods. A special attention is paid to the measurement-to-track assignment methods of the nearest neighbor type. Its basic form based on minimizing the statistical distance with a single time step will be presented and also its variants considering multiple time steps simultaneously for the assignment will be introduced. The methods will be illustrated in a numerical example. View full abstract»

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  • Kinematic analysis of a semi-rigid-elastic multi-body torsional vibration model of gears system

    Publication Year: 2011 , Page(s): 37 - 41
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (214 KB) |  | HTML iconHTML  

    Kinematic analysis of a semi-rigid-elastic multi-body torsional vibration model of gears system is studied by using the state-space model. Equation of motion of gears system is obtained. A four-degree-of-freedom model of the pinion gear-wheel gear system is considered for simplicity. The pinion gear body and wheel gear body are assumed to be rigid. The teeth are assumed to be elastic and parallel spring-damper combinations are assumed to exist between the teeth and the gear body. Differential equations are obtained from equation of motion of gears system. Differential equations are arranged in the state-space form. Rotational positions and rotational velocities are considered as state-variables. The state-space equations of system are solved by MATLAB program. Transmission error of gears system is calculated depending on state-variables. Rotational positions, rotational velocities and transmission error are shown as graphically. It is shown in numerical study that transmission error deepens on various gear parameters and operating conditions. Moreover, it is shown in numerical study that transmission error deepens on elasticity of teeth. View full abstract»

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  • Position accuracy improvement by using feed forward torque in regulation structure of servo drive

    Publication Year: 2011 , Page(s): 42 - 45
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (785 KB) |  | HTML iconHTML  

    The paper describes a way of control of a serial mechatronic chain (electric servodrive + gearbox + cam mechanism + load) in the sense of SW tools usage. The goal of the control law is to reach the maximum position accuracy. The driving motor is set in the position mode which allows a definition of the displacement law (table of predefined position values). The control law uses position-speed-torque cascade with speed feed forward loop applied and torque feed forward loop applied as well. It is possible to couple and to uncouple the different parts of the cascade and investigate the effect of the particular loops. The load of the mechatronic chain was realized by servo drive set in torque mode which enables to keep the constant applied torque. The measured data were recorded using the programming tools of Yaskawa. Firstly the position accuracy was monitored at the constant speed of the drive when the torque of the load was changing. Secondly the displacement law for the driving motor was strictly defined and the accuracy of positioning was monitored again. The experiment results show the beneficial impact of feed forward loops on the position accuracy of a kinematic excitation. View full abstract»

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  • The measurement of properties of mechatronics chain in serial configuration

    Publication Year: 2011 , Page(s): 46 - 49
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1644 KB) |  | HTML iconHTML  

    The subject of this paper is the analysis of properties of the mechatronic chain. That chain was represented by the mechanical system where the particular mechanical elements were linked in serial satisfying this setup: electric servomotor - mechanical gearbox - cam - load. The mechanical and the electrical parameters were monitored. The current and the voltage sensors were installed to determine the instantaneous electrical power and total electrical power as well. Furthermore, the torque sensors, encoders and accelerometers were installed too. The evaluation of signals from sensors allows a number of possible detections such as backlash occurrence, mechanical and electrical efficiency calculation, monitoring of the position accuracy for the motion functions (displacement law) application, influence of mechanical preload, properties of elastic parts, residual vibrations detection, possible instabilities etc. Measurements were performed in three stages. The first set of measurements was obtained applying the constant velocity of the servomotor. The minimal cam-roller backlash was mechanically adjusted. The load of the mechanism was realized using other servomotor which was applying the constant torque. In the second stage the displacement law was defined thus the angular velocity of actuator varied. In the last stage the effect of the mechanical backlash was investigated when the constant velocity of the actuator and constant torque of the load were set. View full abstract»

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  • Software application for study of the soaking process

    Publication Year: 2011 , Page(s): 50 - 53
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (247 KB) |  | HTML iconHTML  

    In the paper we demonstrate use of the computer modeling as a tool for study of the real technological processes. For this purpose, we present the software application that we programmed for study of the soaking which belongs to tannery operations of the raw hide treatment. The software application is destined for computing of the concentration field of unbound undesirable component removing from the pelt during the soaking thereby it enables to obtain prompt basic information about the process course for required conditions of the mentioned process. The computed data are suitable for control and optimization of soaking. View full abstract»

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  • A simulation approach to design of manufacture of automotive engines control units

    Publication Year: 2011 , Page(s): 54 - 59
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (534 KB) |  | HTML iconHTML  

    This paper deals with the use of computer simulation with the aim of design efficient production in manufacturing and production systems. In our case, the possibilities of such use are demonstrated on particular example from industrial practice. The purpose was to build up a model of the prepared manufacture system and, especially, to propose a solution designed to increase productivity and to find bottlenecks in the system. The Witness simulation environment was used for modeling and subsequent simulation. Simulation study of the manufacture of automotive engines control units is presented herein. This example relates to finding the most balanced solution of operator deployment within the manufacturing line field. On the basis of the predefined requirements of the user, several simulation experiments are suggested. Then, a description of the proposed simulation experiments and evaluation of achieved results is presented. View full abstract»

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  • PI/PID controller design for FOPDT plants based on the modulus optimum criterion

    Publication Year: 2011 , Page(s): 60 - 65
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (231 KB) |  | HTML iconHTML  

    We present the PI/PID controller settings for the first order systems with dead time, based on the modulus optimum criterion. The settings provide fast closed-loop response to changes of the reference input. Unlike most other tuning methods, the parameters are obtained without approximation of the delay term, so they remain valid for long dead time. Besides the performance indices, quality of the settings is also evaluated by the stability margin. Although optimal values of the parameters are valid for the reference tracking problem, a compensation of the disturbance lag that preserves the stability margin is proposed for the disturbance rejection problem. View full abstract»

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  • Data continuity solution in fault-tolerant information systems

    Publication Year: 2011 , Page(s): 66 - 69
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (149 KB) |  | HTML iconHTML  

    The paper deals with fault tolerant information systems in raw material industry. Database is a heart of every information (control) system. To store the system in the category of fault tolerant (or disaster tolerant) systems, the goal is to solve the database continuity. Current database systems offer technology for online data mirroring. The paper brings details about solution of database mirroring using Microsoft SQL Server, with practical experiences on real projects. View full abstract»

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  • Small operating system for Freescale HCS08 microcontrollers

    Publication Year: 2011 , Page(s): 70 - 73
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (145 KB) |  | HTML iconHTML  

    This contribution deals with small real-time operating system RTMON developed at our institute as a teaching aid for microcontroller programming lessons. This new system is based on previous versions of RTMON for HC11 microcontroller and for PC. It should make it possible for students to understand the basic concepts of creating applications with use of operating system and easily write their own applications with several concurrently running processes in C language. The operating system currently works on Freescale HCS08 GB60 and QE128 microcontrollers and also on Atmel AVR Mega8 microcontroller. View full abstract»

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  • Sunny days and consumed energy

    Publication Year: 2011 , Page(s): 74 - 79
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (580 KB) |  | HTML iconHTML  

    This paper describes experiment based on calculation of heat consumption for part of the town during the winter season. It is based on historical data analysis in the view of the nature of the sun activity. The relationship between heat consumption and outside temperature is sought and expressed in linear formulas. These relations are then improved by the inclusion of the information about sun activity during a day. The main idea is to separate sunny and common days and then describe heat consumption individually for them. This contribution also shows simple method substituting sun intensity measurement by the comparison of temperature differences. View full abstract»

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  • Comparison of the methods for the calculation of fractional-order differential equations

    Publication Year: 2011 , Page(s): 80 - 84
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (230 KB) |  | HTML iconHTML  

    Real objects in general are fractional-order systems, although in some types of systems the order is very close to an integer order. Since major advances have been made in this area in the last decades, it is possible to consider also the real order of the dynamical systems by using fractional order of the differential equations. Such models are more adequate for the description of dynamical systems than integer-order models. Appropriate methods for the numerical calculations of fractional-order differential equations are needed. In this contribution we will compare some previous methods used for simulation purposes with the methods based on approximate formulas for numerical inversion of Laplace transforms. The verification and comparison will be based mainly on the accuracy and computing time which is very important e.g. in the tasks of simulation or identification using optimization methods where too many calculations are needed and faster methods can save time very significantly. View full abstract»

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  • Simple data acquisition unit for school laboratory exercises

    Publication Year: 2011 , Page(s): 85 - 88
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (421 KB) |  | HTML iconHTML  

    Paper deals with design of general purpose microcontroller-based data acquisition device suitable for all tasks related to process measurement with focus on laboratory exercises. Hardware design is fully adapted to requirements such as high reliability and immunity against industrial environment, very low power consumption enabling battery operation when used with laptop computer, platform independent communication interface, compact dimensions and finally high precision. Functionality of designed data acquisition device was verified on educational laboratory heat plant connected via RS232 communication interface with supervision computer running Matlab 7.3 software. View full abstract»

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  • Modelling of a linear proportional electromagnetic actuator and possibilities of sensorless plunger position estimation

    Publication Year: 2011 , Page(s): 89 - 93
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (442 KB) |  | HTML iconHTML  

    In flow control and in hydraulic systems used in automotive industry, e.g. brakes or automatic transmission units, one of the basic controlling problems is the precise adjustment of oil (fluid) pressure. As an electromechanical actuator, switching and linear variable solenoids are widely used in such applications. In this paper, a magnetic valve is analyzed in details. The main features of the system are highlighted and a proper solenoid model is intended to be established as well. Reliability and cost-efficiency are key requirements for actuators in the field of automotive engineering. For this purpose, sensorless position estimation for linear translational valve actuators is also proposed in this paper. According to this principle, the plunger position could be predicted from the magnetic valve's electrical impedance by using its transducer characteristics during excitation. As a great advantage, an external position or pressure transducer becomes unnecessary thus saving additional costs and further improving system robustness. This paper also presents and studies two different methods for sensorless position prediction which can be implemented under pulse width modulated drive conditions. View full abstract»

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  • Corrective feed-back control of the annealing process with utilization of the indirect measurement

    Publication Year: 2011 , Page(s): 94 - 97
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (228 KB) |  | HTML iconHTML  

    In this contribution is described corrective feedback control of the steel roll's annealing process based on behavior of inner temperature in the roll with utilization of indirect measurement system of the inner steel roll temperatures. Indirect measurement system of the inner temperatures indirect measures temperature inside the roll that is not measurable without destruction of the roll, from direct measured temperature of the atmosphere. Indirect measured temperature inside the roll in chosen place (coolest place in the roll) is as input to the algorithm of the corrective feed-back control. This control adjusts atmosphere temperature for next control step, based on error calculation between required inner temperature and indirect measured inner temperature. View full abstract»

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  • Frequency response based identification of fractional order dynamical systems

    Publication Year: 2011 , Page(s): 98 - 102
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (226 KB) |  | HTML iconHTML  

    In the paper a comparison of different optimization methods to identification of fractional order dynamical systems is presented. The fractional models of the examples of physical systems - ultracapacitors - are established. Then different real frequency responses data from a laboratory setup of the processes are collected and the comparison of identification methods based on Least Squares and Total Least Squares are presented. The accuracy of the methods is discussed using the frequency responses of the identified model and the theoretical one. View full abstract»

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  • Analysis of environment's vibro-acoustic expressions by robot

    Publication Year: 2011 , Page(s): 103 - 106
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (241 KB) |  | HTML iconHTML  

    There are certain situations when the robot's ability to evaluate the vibro-acoustic expressions from an environment is important. In the area where the robot moves there can occur the sources of the acoustic or vibrating emissions, which has got their own specific parameters. The character's modification of these expressions could require an adequate robot reaction. To this purpose, it is necessary to find the fast and clear algorithms that will be able to reliably detect the deviation of the vibro-acoustic expressions from its stationary state. The article suggests as a highly convenient to use the Hilbert's spaces as a solution to this problem. View full abstract»

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  • Delay-dependent control of linear time-delay systems

    Publication Year: 2011 , Page(s): 107 - 110
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (192 KB) |  | HTML iconHTML  

    This paper is concerned with the problem of stabilization for discrete-time systems with time-varying delays and the presentation of an improved version of the state feedback control design method. In the spirit of Lyapunov-Krasovskii functional application the delayed-dependent stability condition is derived in terms of linear matrix inequalities. The result giving a sufficient condition for stabilization of the time-delay system is illustrated with a numerical example to note reduced conservatism in the system structure. View full abstract»

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  • Pneumatic valves based on Magnetic Shape Memory Alloys: Potential applications

    Publication Year: 2011 , Page(s): 111 - 114
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (224 KB) |  | HTML iconHTML  

    The available deformation range, forces and frequency of the Magnetic Shape Memory Alloys (MSMA) render them suitable for applications in electro-mechanical transducers, used to control pneumatic valves. A fast-operating electro-mechanical transducers can be designed, whose driving elements should not execute any motion, as they do in valves available to date, and which should get deformed instead. Utilising the deformation of an element made from the MSMA, the active element of the valves may be shifted, thus changing the flow orifice. Valves made of MSMA can become a new group of electric valves, featuring improved dynamic behavior and better resistance to external vibrations. The first applications of valves made of MSMA are expected in direct-action proportional throttling valves. View full abstract»

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