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International Symposium on Intelligent Systems and informatics (SISY)

作者： Adam Csapo Peter Baranyi Computer and Automation Research Institute Cognitive Informatics Research Group Budapest Hungary Department of Telecommunications and Media Informatics Budapest University슠of슠Technology슠and슠Economics Budapest Hungary

We refer to channels of communication that link the user to information systems as cognitive communication channels. One especially interesting research topic related to cognitive communication channels deals with a special application called sensory substitution, when information is conveyed through a channel other than the one that is normally used for the given application. Our goal is to develop engineering systems for the remote teleoperation of robots using sensory substitution to convey feedback information in meaningful ways. Such applications could help reduce the cognitive load for the user on the one hand, and help alleviate the effect of control instabilities and hidden parameters on the other. In this paper, we present a tensor algebraic approach for the compact representation of complete sensory substitution channels. Using HOSVD, we transform our representations into canonical, orthogonal forms. Through a combination of rank-reduction and error compensation techniques, we propose an iterative and hierarchical parameter space exploration method which may help users tune the generated sensory substituted signals in a more intuitive fashion. As an application example, we present a mapping between tactile percepts and auditory parameters in order to convey the tactile experience of a robot to a remote user through sound. In order to be able to apply a wide a wide range of mathematical analysis tools - such as principal component analysis and user performance-oriented adaptivity - we demonstrate that it is possible to convert our models into HOSVD-based canonical forms. The verification of the enhanced parameter space exploration method using rank reduction and error compensation in this application remains part of our future work.

关键词： Tensile stress Mathematical model Tuning Robot sensing systems Equations Surface roughness Rough surfaces

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Determination of the Stability Parameter Space of a Two Dimensional Aeroelastic System, a TP Model-based Approach

Determination of the Stability Parameter Space of a Two Dime...

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International Conference on Intelligence Engineering Systems

作者： Patricia Grof Peter Baranyi Peter Korondi "Computer and Automation Research Institute/Cognitive Informatics Research Group Budapest University of Technology and Economics/Dept. of Telecommunications and Media Informatics Budapest University of Technology and Economics/Dept. of Mechatronics Optics and Engineering Informatics

ISBN: (纸本)9781424476527

This paper falls in the topic of qLPV state-space model based control design in which LMIs are used to optimize the multi-objective control performance. In this paper we investigate how the convex hull of the polytopic model influences the feasibility of the LMI based control design and the resulting control performances. We examine these influences through the control design of the two dimensional aeroelastic system's example. First we define various TP type polytopic model representations of a wing section whose vertices define different convex hulls. In the second step we investigate how these models lead to different control performances.

关键词： Stability Control systems Nonlinear control systems Delay effects Space technology Control design Feedback control Displacement control Force control Velocity control

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Polytopic representation of impedance model with feedback delay

Polytopic representation of impedance model with feedback de...

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作者： Galambos, Péter Baranyi, Péter Korondi, Péter Computer and Automation Research Institute Hungarian Academy of Sciences Cognitive Informatics Group Hungary Budapest University of Technology and Economics Dept. of Manufacturing Science and Technology Hungary Budapest University of Technology and Economics Dept. of Telecommunications and Media Informatics Hungary Budapest University of Technology and Economics Dept. of Mechatronics Optics and Engineering Informatics Hungary

ISBN: (纸本)9789549260014

In haptic and telemanipulation devices stability and transparency are contradicting requirements. Due to the network delay the control process may become unstable. In our research we consider the coupled impedance type control algorithms for force reflecting telemanipulation. In this paper, an extended TP model transformation is proposed to convert the delayed system into a polytopic tensor product (TP) model considering the value of the feedback delay as a parameter. Using such model, the design of a stabilizing controller become easier as it does not contain feedback delay. As example, a single degree of freedom impedance model with feedback delay is discussed. The results are confirmed by numerical simulation.

关键词： Degrees of freedom (mechanics)

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Malware Detection by Data Mining Techniques Based on Positionally Dependent Features

Malware Detection by Data Mining Techniques Based on Positio...

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Euromicro Conference on Parallel, Distributed and Network-Based Processing

作者： Dmitriy Komashinskiy Igor Kotenko Computer Security Research Group Saint Petersburg Institute for Informatics and Automation Saint Petersburg Russia

The challenges being thrown to modern world by the need to counteract against malicious software (malware) are going on to increase own importance. This fact stays actual, in spite of obvious great results in improving the efficacy of procedures of malware propagation detection, analysis and updating the bases of signatures and detection rules. The important aspect of this problem is looking for more reliable heuristic detection methods. These methods focus on recognition of new (unknown before) malicious programs which can not be detected by using traditional signature- and rule-based detection techniques, oriented on search for concrete malware samples and families. Virtually, just these heuristic methods provide counteraction against targeted and zero-day attacks, since the rate of detecting such relatively new types of threats by traditional techniques is not enough. The presented paper is devoted to using Data Mining methods for constructing heuristic malware detectors. The approach described below differs from others by focusing on processing static positionally dependent features which consider the specificities of object's file format of potential malware containers. The paper describes the realization and investigation of the common methodology for design of Data Mining-based malware detectors' using positionally dependent static information.

关键词： Data mining Phase detection Detectors computer security informatics automation Electronic mail Concrete Containers Design methodology

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Convex hull manipulation based control performance optimisation

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WSEAS Transactions on Systems and Control 2010年第8期5卷 691-700页

作者： Gróf, Patrícia Baranyi, Péter Korondi, Péter Computer and Automation Research Institute Cognitive Informatics Research Budapest Hungary Budapest University of Technology and Economics Dept. of Telecommunications and Media Informatics Budapest Hungary Budapest University of Technology and Economics Dept. of Mechatronics Optics and Engineering Informatics Budapest Hungary

This paper deals with the topic of qLPV state-space model based control design in which LMIs are used to optimize the multi-objective control performance. In this paper we investigate how the manipulation convex hull of the polytopic model influences the control performance which is derived by LMIs. We examine these influences through the control design of the two dimensional aeroelastic system's example. First we define various TP type polytopic model representations of a wing section whose vertices define different convex hulls. In the second step we investigate how these models lead to different control performances.

关键词： State space methods

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Control performance optimization by convex hull manipulation

Control performance optimization by convex hull manipulation

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IEEE International Workshop on Robotics in Alpe-Adria-Danube Region (RAAD)

作者： Patricia Gróf Péter Baranyi Péter Korondi Cognitive Informatics Research Group Computer and Automation Research Institute Hungary Department of Mechatronics Optics and Engineering Informatics Budapest University슠of슠Technology슠and슠Economics Hungary Department of Telecommunications and Media Informatics Budapest University슠of슠Technology슠and슠Economics Hungary

This paper deals with the topic of qLPV state-space model based control design in which LMIs are used to optimize the multi-objective control performance. In this paper we investigate how the convex hull of the polytopic model influences the control performance of the LMI based control design. We examine these influences through the controller and observer design of the two dimensional aeroelastic wing's example. First we define various TP type polytopic model representations of a wing section whose vertices define different convex hulls. In the second step we investigate how these models change the control performance.

关键词： Delay effects Control design Feedback control Robotics and automation Optical control Telecommunication control informatics Design optimization Limit-cycles Control systems

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Virtual Collaboration Arena

Virtual Collaboration Arena

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International Symposium on Applied Machine Intelligence and informatics (SAMI)

作者： Ádám Vámos Barna Reskó Péter Baranyi Cognitive Info Communication Research Group Computer and Automation Research Institute Hungarian Academy of Sciences (ATOMKI) Budapest Hungary Regional Education and Innovation Center Óbuda University Budapest Hungary

This paper presents a system for high level collaboration between humans and intelligent agents in a virtual reality. The proposed system is capable of creating a virtual world including its visualization and simulation of Newtonian physics. Furthermore, with voice recognition and synthesization conversations can be made with intelligent agents in a user friendly way. The proposed system is able to connect the different communication modalities of the human user and the intelligent agents, allowing to control them using the brain-in-the-loop control method. Finally the capabilities of the system is demonstrated on two examples.

关键词： Collaboration Intelligent agent Humans Communication system control Control systems Virtual reality Visualization Brain modeling Physics Speech recognition

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TP model transformation based sliding mode control design for nonlinear systems

TP model transformation based sliding mode control design fo...

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International (EPE-PEMC) Power Electronics and Motion Control Conference

作者： Béla Takarics Péter Korondi Péter Baranyi Cognitive Informatics Research Group Computer and Automation Research Institute Budapest Hungary Department of Mechatronics Optics and Engineering Budapest University슠of슠Technology슠and슠Economics Budapest Hungary Department of Telecommunications and Media Informatics Budapest University슠of슠Technology슠and슠Economics Budapest Hungary

The main contribution of this paper is a new sliding mode design for nonlinear systems. This method is based on Tensor Product Model Transformation. It is partially extension and combination of the classical optimal manifold design for linear (or linearized) system and sector sliding mode control. This new approach enables a systematic design and decomposition of optimal sliding sector by the High Order Singular Value Decomposition (HOSVD)-based canonical description of a wide class of nonlinear systems. Two design examples and experimental results of a DSP-controlled single-degree-of-freedom motion-control system are presented.

关键词： Friction Sliding mode control Switches Tensile stress Mathematical model Nonlinear systems

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Performance/Robustness Limit Evaluation for Lyapunov-Stable Nonlinear Plants

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IFAC Proceedings Volumes 2010年第10期43卷 202-207页

作者： Cs. Bányász L. Keviczky Computer and Automation Research Institute of the H. Ac. of Sc. Control Engineering Research Group of the H. Ac. of Sc.at the Dept. of Automation and Informatics Budapest Univ. of Technology and Economics H-1111 Budapest Kende u 13-17 HUNGARY

Lyapunov-stable nonlinear plants can be approximated by an LTI model in many cases. If this approximation is obtained then it is possible to construct a G2DOF control system. The paper presents a new approach how the important relationships between the actuator, process and design parameters furthermore robustness measures can be determined. In this decomposition method the optimal control design for two-degree of freedom time delay control systems is discussed. Using a proper CAD algorithm the exact relationships can be plotted and the ultimate robustness limit of any control can be explicitly calculated.

关键词： nonlinear control Lyapunov stability performance analysis robustness limit

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Friction compensation of an aeroelastic wing — A TP model transformation based approach

Friction compensation of an aeroelastic wing — A TP model t...

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International Symposium on Intelligent Systems and informatics (SISY)

作者： Béla Takarics Patrícia Gróf Péter Baranyi Péter Korondi Department of Mechatronics Optics and Engineering Informatics Budapest University슠of슠Technology슠and슠Economics Budapest Hungary Computer and Automation Research Institute Cognitive Informatics Research Group Budapest Hungary Dep. of Mechatronics Optics and Eng. Informatics Budapest Hungary Dep. of Telecommunications and Media Info. Budapest Univ. of Technology and Economics Budapest Hungary

Various approaches to control aeroelastic wing section with structural nonlinearity emerged in the last years. One of the approaches is based on the Tensor Product (TP) model transformation and the feasibility test of linear matrix inequalities (LMIs) under the Parallel Distributed Compensation framework. The main contribution of this paper is that it extends the previously established qLPV model of the aeroelastic wing section with nonlinear friction. It is proven that the extended model can be exactly described after TP type polytopic decomposition. The qLPV model of the aeroelastic wing section with Coulomb friction was transformed to TP type polytopic model form for which LMI based controller was designed. The designed controller is compared to controllers of other authors dealing with the same problem.

关键词： Friction Mathematical model Force Tensile stress Biological system modeling Numerical models Finite element methods

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