Communications - Scientific Letters of the University of Zilina, 2007 (vol. 9), issue 1
Articles
Mechatronics Systems
Ladislav Jurisica
Communications - Scientific Letters of the University of Zilina 2007, 9(1):5-7 | DOI: 10.26552/com.C.2007.1.5-7 
The term mechatronics refers to systems with special characteristics that can be achieved only as a whole, and cannot be realized through other means. Integrating mechanical and electronic components with control systems and informatics during design was introduced due to new performance requirements on system quality, its overall reliability, dynamics, low energy consumption, low weight, etc. The paper is focused on the basic information about mechatronics.
Analysis of Electromechanical Actuator Based on FEM - Circuit Simulator Coupling
P. Bauer, J. Sitar
Communications - Scientific Letters of the University of Zilina 2007, 9(1):8-16 | DOI: 10.26552/com.C.2007.1.8-16
Design and simulation of an electromechanical system is multidisciplinary. In this paper three different types of co-simulation of a mechatronic system are compared. The co-simulation is realized between two different programs (power electronic circuit simulator - control part and finite element analysis - magnetic and mechanic model part). The simulations were realized for an electromechanical actuator fuel injection system. The output waveforms for coil current, forces, inductances and position are compared. Finally the measured waveforms are presented too.
Humanoid Type Hand Moved by Shape Memory Alloy
Peter Korondi, Peter Zsiros, Fetah Kolonic
Communications - Scientific Letters of the University of Zilina 2007, 9(1):17-23 | DOI: 10.26552/com.C.2007.1.17-23
The main contribution of this paper is a practical application of generalised neural networks for a dextrous hand moved by Shape Memory Alloys (SMA). Since SMA have highly non-linear characteristics and their parameters depend on the environment (mainly on temperature) so the robot hand is controlled by a generalised neural network, which can learn the actual non-linear characteristics of the robot hand. The experimental setup consists of a 20 degree of freedom hand moved by SMA string used as artificial muscle. A video camera is used to detect the position of joints. The position is then sent to the visual display computer via the Internet, which...
A Sensorless PM Synchronous Motor Drive for Electric Washers
R. Filka, P. Balazovic, Branislav Dobrucky
Communications - Scientific Letters of the University of Zilina 2007, 9(1):24-32 | DOI: 10.26552/com.C.2007.1.24-32
This paper presents a complex solution for whole speed range sensorless control of interior permanent magnet synchronous motor drives. To cover an entire speed range of IPMSM without position transducer, different sensorless techniques must be employed. Design and implementation of sensorless techniques for different operating speeds are described in this paper. Presented application has been implemented including the high frequency (hf) injection method and extended back EMF state observer on a single chip solution of DSC56F8300 series without any additional supportive circuitry. The extended back EMF algorithm with angular speed and position observer...
Modelling of Thermal Transient Phenomena in Axial Flux Permanent Magnet Machine Based on Coupling of Two Separeted Models - Electrical and Thermal Models
Eva Belicova
Communications - Scientific Letters of the University of Zilina 2007, 9(1):33-37 | DOI: 10.26552/com.C.2007.1.33-37
The paper deals with transient thermal modelling of air cooled axial flux permanent magnet machine. It has a rotor with permanent magnets placed on the rotor surface situated between two stators. The simulation model consists of two equivalent circuits - electrical equivalent circuit and thermal equivalent circuit to cover various machine operations. This model can be very useful mainly in mechatronic applications in order to be sure that applied machine will manage with requirements put by operation conditions and environment roughness.
Six Legged Walking Robot Simulation and Control
Tomas Michulek, Vojtech Simak, Jan Capak
Communications - Scientific Letters of the University of Zilina 2007, 9(1):38-42 | DOI: 10.26552/com.C.2007.1.38-42
The authors present the first results of their scientific work related to design and development of the walking robot control systems in virtual reality. Six-legged walking robot was created along with its virtual counterpart simulated in virtual environment. A control system was created and tested on virtual model. This control system was then directly used to control real robotic construction. Differences between real and virtual robot behavior were analyzed.
The Communication in Mechatronic Systems
Fedor Kallay, Peter Peniak
Communications - Scientific Letters of the University of Zilina 2007, 9(1):43-46 | DOI: 10.26552/com.C.2007.1.43-46
The paper deals with mechatronic systems and communication among mechatronic modules. This article proposes possible solution of usage open CAL protocol above CAN bus, which is independent from any manufacturers and can be widely accepted themselves. The main attention is paid to open CAN/CAL protocols including the viewpoint of their implementation, essential functions and potential integration within the vehicle control system. The required communication functions, communication models, communication objects (PDO, SDO) and applied profiles are being described in the CAL protocol. As an example a double bus CAN system is shown as a typical CAN/CAL...
Methods in Teaching Industrial Mechatronic Systems
Viliam Fedak, Pavol Bauer
Communications - Scientific Letters of the University of Zilina 2007, 9(1):47-51 | DOI: 10.26552/com.C.2007.1.47-51
Explanation in courses from the field of mechatronics is enough difficult due to the complexity and variety of phenomena to be explained. The introduction of computer based learning enables to make the learning easier and visualisation of variables offers a deeper insight in the system behaviour. Moreover, the introduction of e-learning into the teaching praxis makes learning in the courses more attractive for students and easier for the understanding of the presented subject. The paper describes the e-learning support of the study programmes in industrial mechatronic systems. Topics in e-learning modules are structured hierarchically starting from...
E-Mechatronics: Digital Content in Transformation of Teaching and Learning
Pavel Pavlasek
Communications - Scientific Letters of the University of Zilina 2007, 9(1):52-59 | DOI: 10.26552/com.C.2007.1.52-59
This article deals with mechatronics as a one of the leading and fast growing world industrial and economic sectors, for which in educational niche it is critical to provide enriched digital contents through a homogenous training tool. Mechatronics is from now based on historical know-how but truly needs to evolve through enhanced collaboration with various industries: home and office products, transport, automotive, space, etc. Providing the eContent of mechatronics as a common training tool that will help these multidisciplinary collaborations and strength exchanges within these scientific and technological areas eMECHATRONICS will position itself...
Automative Unwinding of Waste Paper from Reel Spools
Pavel Lehocky, Robert Kohar, Slavomir Hrcek, Jan Podhorsky, B. Surmova, Stefan Medvecky, Alena Hrcekova
Communications - Scientific Letters of the University of Zilina 2007, 9(1):60-66 | DOI: 10.26552/com.C.2007.1.60-66
Paper industry deals with procedures for conceptual and final design of a machine intended for unwinding paper that remains on reels during a certain phase of paper producing. Design procedure of the machine is a subject of this paper. The machine was designed as a mechatronic unit consisting of a mechanical part, an electric part and a pneumatic part. 3D CAD/CAM system Pro/ENGINEER was used for the design of the mechanical part. For the automation processes the PLC unit connected with the frequency changing unit and asynchronous drive were used as a central drive for the unwinding machine.
The Stability of Hydro Technical Embankments under Various Seepage Conditions
Adam Balawejder, Mieczyslaw Chalfen, Tadeusz Molski, Andrzej Surowiecki
Communications - Scientific Letters of the University of Zilina 2007, 9(1):67-70 | DOI: 10.26552/com.C.2007.1.67-70
The flood control devices in Bytom Odrzanski protect the city against the Odra water flooding with a probability p 10 20 %. The flood protection devices (class validity II) of hydro-technical structures are designed and realized for protection improvement and designed on the flow in the Odra river with a probability p 1 % . The earth embankment (2044 total in length) will be built with local non-cohesive grounds. On the 900 m length, the base of the embankment presents no cohesive grounds. It causes conditions for free filtration through the base and body of the embankment. The computer calculations of filtration showed high (locally) hydraulic...
The Linear Elliptic - Surfaces of Revolution
Tatiana Olejnikova
Communications - Scientific Letters of the University of Zilina 2007, 9(1):71-75 | DOI: 10.26552/com.C.2007.1.71-75
The paper presents a category of revolution surfaces which may be generated by the metrical Euclidean transformation compounded by revolutions and displacements. These surfaces are created by a straight line revolution around a revolution axis moving on an ellipse. This surface group is classified according to the relative positions of a revolution axis moving in contact with an ellipse, and according to the relative positions of a straight line and a revolution axis . The straight line revolution and axis motion can be for equal or different orientation and both can have equal or different radian frequencies. The transformation matrices for the vector...