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International Conference on Computer Vision Theory and Applications (VISAPP)

作者： Ákos Pernek Levente Hajder Hungarian Academy of Sciences Computer and Automation Research Institute Budapest Hungary Department of Automation and Applied Informatics Budapest University of Technology and Economics Budapest Hungary

ISBN: (纸本)9781479976867

Robust human face recognition is one of the most important open tasks in computer vision. This study deals with a challenging subproblem of face recognition: the aim of the paper is to give a precise estimation for the 3D head pose. The main contribution of this study is a novel non-rigid Structure from Motion (SfM) algorithm which utilizes the fact that the human face is quasi-symmetric. The input of the proposed algorithm is a set of tracked feature points of the face. In order to increase the precision of the head pose estimation, we improved one of the best eye corner detectors and fused the results with the input set of feature points. The proposed methods were evaluated on real and synthetic face sequences. The real sequences were captured using regular (low-cost) web-cams.

关键词： Robustness Polynomials Optimization

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Drawing simultaneously embedded graphs with few bends

Lecture Notes in Computer Science (including subseries Lectu...

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Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2014年 8871卷 40-51页

作者： Grilli, Luca Hong, Seok-Hee Kratochvíl, Jan Rutter, Ignaz Dipartimento di Ingegneria Università degli Studi di Perugia Italy School of Information Technologies University of Sydney Australia Department of Applied Mathematics Charles University in Prague Czech Republic Institute of Theoretical Informatics Karlsruhe Institute of Technology Germany

We study the problem of drawing simultaneously embedded graphs with few bends. We show that for any simultaneous embedding with fixed edges (SEFE) of two graphs, there exists a corresponding drawing realizing this embedding such that common edges are drawn as straight-line segments and each exclusive edge has a constant number of bends. If the common graph is biconnected and induced, a straight-line drawing exists. This yields the first efficient testing algorithm for simultaneous geometric embedding (SGE) for a non-trivial class of graphs. © Springer-Verlag Berlin Heidelberg 2014.

关键词： Drawing (graphics)

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New Design “Duplo-headstock”

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Procedia Engineering 2014年 69卷 1336-1344页

作者： Ľubomír Šooš Stanislav Ďuriš Rudolf Palenčár Slovak Slovak University of Technology in Bratislava Faculty of Mechanical engineering Institute of manufacturing systems environmental technology and quality management Nám. slobody 17 812 31 Bratislava 1 SlovakRepublic Slovak University of Technology in Bratislava Faculty of Mechanical engineering Institute of automation measurement and applied informatics Nám. slobody 17 812 31 Bratislava 1 SlovakRepublic

The quality of machine tools is critical in determining their productivity and the accuracy of the finished work piece. The headstock of the machine tool has the greatest impact on these parameters. The tool or work-piece holder must meet specific demands for maximum speed and rigidity. These two parameters are variable, but always in contradiction, and depend mainly on the Spindle-Bearings System (SBS). In this context, SBS are increasingly being produced in combination with roller bearings, and with various combinations of radial ball bearings. This is mainly because the radial ball bearings allow groupings of different combinations to achieve the optimal compromise between the required maximum speed and the desired stiffness of the SBS. Stiffness, especially in ball bearings, is not constant but dependent on the magnitude of the load. The SBS is a statically indeterminate system, and an accurate calculation of the bearings and its nodes, as well as the whole system, is only possible using iterative methods. The exact calculation of SBS stiffness cannot be achieved without the use of powerful computers and high-quality software. Selection of the optimal configuration is achieved by analyzing a number of potential, alternative SBS solutions. The exact calculation of a large number of variants, and manufacturing their prototypes, is time consuming and very expensive. The solution is to quickly determine, with sufficient reliability, the parameters of the bearing nodes, which are influenced by the radial ball bearings. It is only in the final variation that an accurate calculation using iterative methods can be made, followed by subsequent production of a prototype for verification. At our workplace, we dedicate our time to intensive research into bearing nodes and the complete SBS.

关键词： ball bearing angular contact bearing node spindle bearing system machine tool spindle spindle duplication stiffness

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A 19 Level Dodecagonal Voltage Space Vector Structure for Medium Voltage IM Drive

A 19 Level Dodecagonal Voltage Space Vector Structure for Me...

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Annual Conference of the IEEE Industrial Electronics Society

作者： R. Sudharshan Kaarthik K. Gopakumar Carlo Cecati Istvan Nagy Department of Electronic Systems Engineering Indian Institute of Science Dept. of Industrial and Information Engineering and Economics University of L'Aquila Dept. of Automation and Applied Informatics Budapest University of Technology and Economics

ISBN: (纸本)9781479940318

In this paper, a nineteen level dodecagonal voltage space vector structure is proposed for the first time, by cascading two asymmetric three level inverters with isolated H-Bridges. The dodecagonal structure is made possible by proper selection of DC link voltages and switching states of the inverters. The proposed scheme retains all the advantages of multilevel topologies as well the advantages of dodecagonal voltage space vector structure. A generic and simple method for calculation of PWM timings is proposed. Also, a new method of switching technique is proposed, which ensures minimum switching while maintaining the linearity between modulating signals and the output phase voltages. Extensive simulation and experimental results have been presented for validation of the proposed concept.

关键词： Multilevel Inverters Pulse Width Modulation Induction Motor Drive Neutral Point Clamped Cascaded H-Bridge Dodecagonal Voltage Space Vector Structure

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Advanced Robotic Grasping System Using Deep Learning

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Procedia Engineering 2014年 96卷 10-20页

作者： Pavol Bezak Pavol Bozek Yuri Nikitin Research Centre of Progressive Technologies Slovak University of Technology Hajdoczyho 1 917 24 Trnava Slovakia Institute of Applied Informatics Automation and Mathematics Slovak University of Technology Hajdoczyho 1 917 24 Trnava Slovakia Department of Mechatronic Systems Kalashnikov Izhevsk State Technical University Izhevsk Russia

Object grasping by robot hands is challenging due to the hand and object modeling uncertainties, unknown contact type and object stiffness properties. To overcome these challenges, the essential purpose is to achieve the mathematical model of the robot hand, model the object and the contact between the object and the hand. In this paper, an intelligent hand-object contact model is developed for a coupled system assuming that the object properties are known. The control is simulated in the Matlab Simulink/SimMechanics, Neural Network Toolbox and Computer Vision System Toolbox.

关键词： Robot hand Modeling Grasping Neural networks Deep learning Object recognition Pose estimation

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The issue of calculating elliptic trajectories

Manufacturing Technology

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Manufacturing technology 2014年第4期14卷 561-566页

作者： Lozhkin, Alexander Abramov, Ivan Bozek, Pavol Nikitin, Yuri Departments 'Software' and 'Mechatronic Systems' M.T. Kalashnikov Izhevsk State Technical University Studencheskaya St. 7 Izhevsk426069 Russia Institute of Applied Informatics Automation and Mathematics Faculty of Materials Science and Technology Slovak University of Technology Hajdóczyho 1 Trnava917 24 Slovakia

The design of elliptic trajectories of kinematic mechanisms by classical method is a challenge. New method is proposed. Theoretical tests were conducted on a method. It can not be used for scaling and rotation. Some limitations are revealed as well. Geometric modeling showed the method can be applied to arbitrary curves. It should be noted that the theoretical and modeling researches of arbitary curves is not full. Simple robot was designed for processing ellipses. The design of the stand was assembled from aluminum profiles, linear modules and fasteners RK Rose + Krieger. Experiments have shown a difference between the theoretical and actual trajectory less than 5%. The error of stationing was 8,5% before using of the direct analytical method. © 2014. Published by Manufacturing technology.

关键词： Trajectories

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Utilisation of on-line machine learning for SCADA system alarms forecasting

Utilisation of on-line machine learning for SCADA system ala...

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2013 Science and Information Conference, SAI 2013

作者： Skripcak, Tomas Tanuska, Pavol Institute of Applied Informatics Automation and Mathematics Slovak University of Technology Faculty of Materials Science and Technology Trnava Slovakia

ISBN: (纸本)9780989319300

This paper describes a prototype design and implementation of a real-time (on-line) knowledge generation component which can be utilised in industrial Supervisory Control and Data Acquisition (SCADA) systems. The overall architecture of our SCADA scenario, which utilise proposed knowledge generation is based on a multi-agent approach. This design is different from what we can see in conventional commercial SCADA solutions. Nowadays, there is a big pressure on operators to precisely analyse a huge amount of data coming from technological processes and make right decisions in the right time. This is where a real-time knowledge generation can highly improve decision making strategies in complex industrial processes. Nevertheless, the actual state of the art solutions are usually not using the knowledge generation directly, or there are often restricted so called off-line learning approaches. The recent development in the area of machine learning lead to the creation of distributed solutions which could process real-time data and dynamically adapt the generated knowledge. We applied this on-line machine learning approach in our proposed prototype. The experimental agent is focused on the specific scenario of the process alarm forecasting, which is considered to be a binary classification problem. We describe our solution for useful classifier feature vector construction. The classifier itself is based on Passive-Aggressive algorithm. Furthermore, in order to evaluate a performance of the classification the results from knowledge generation experiments were provided in form of Matthews Correlation Coefficient (MCC) together with Receiver Operating Characteristic (ROC). The proposed prototype shows how to design and implement an on-line knowledge generation component for novel SCADA solutions. © 2013 The Science and Information Organization.

关键词： SCADA systems

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The proposal of function in smart home for handicapped users

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2012 International Conference on Mechanical Materials and Manufacturing Engineering, ICMMME 2012

作者： Hamernik, Peter Tanuska, Pavol Mudroncik, Dusan Institute of Applied Informatics Automation and Mathematics The Faculty of Materials Science and Technology Slovak University of Technology Trnava Slovakia

Nowadays are smart homes aimed at healthy users. Much less emphasis is placed on the handicapped users. The article is focused on classification of function in a smart home for users with Alzheimer's disease assoc... 详细信息

ISBN: (纸本)9783037855560

关键词： automation

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Fuzzy control of robotic arm implemented in PLC

Fuzzy control of robotic arm implemented in PLC

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IEEE 9th International Conference on Computational Cybernetics, ICCC 2013

作者： Skulavik, Tomas Kopcek, Michal Kopcekova, Alena Institute of Applied Informatics Automation and Mathematics Slovak University of Technology in Bratislava Faculty of Materials Science and Technology Trnava Slovakia

ISBN: (纸本)9781479900633

This article deals with a design of a fuzzy control system for robotic arm and its implementation to PLC. Fuzzy logic is used to calculate the proper speed of robot tool center point depending on the tilt of the joystick handle in manual operating mode. In fully automatic mode the fuzzy logic is used in form of a fuzzy PI controller to achieve the desired velocity with the load compensation. Fuzzy system was designed in the Siemes Fuzzy Control ++ and was implemented to Simatic S7-\300 PLC. © 2013 IEEE.

关键词： Fuzzy control

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Solutions of systems of linear differential equations with constant coefficients in education of automation

Solutions of systems of linear differential equations with c...

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2013 16th International Conference on Interactive Collaborative Learning, ICL 2013

作者： Abas, Marcel Libošvárová, Adriána Institute of Applied Informatics Automation and Mathematics Faculty of Materials Science and Technology in Trnava Slovak University of Technology in Bratislava Trnava Slovakia

ISBN: (纸本)9781479901531

Systems of linear differential equations with constant coefficients occur in the area of operations research very frequently. These arise, for example, as mathematical models of dynamical systems. One can solve linear systems using the method of variation of parameters or using Laplace transform. Sometimes, for the given system, both the methods can be used, while in other cases we can solve it only by one of the methods. In particular, if the system is an initial value problem with discontinuous forcing terms we (frequently) have to solve it using Laplace transform. On the other hand, if there are boundary conditions of special types, it is not possible to use Laplace transform. In this contribution we show how to solve it in both cases and we also show that the student of automation have to know both the ways of solution. © 2013 IEEE.

关键词： Laplace transforms

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