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International Conference on system Theory, control, and Computing (ICSTCC)

作者： Constantin F. Caruntu Cosmin Copot Corneliu Lazar Robin De Keyser Faculty of Automatic Control and Computer Engineering Gheorghe Asachi Technical University of Iasi Iasi Romania Department of Electrical energy Systems and Automation Ghent University Ghent Belgium

The increased traffic flow on both existing highways and city roads leads to the appearance of stop-and-go waves which have many disadvantages, e.g., increased risk of accidents, higher fuel consumption, increased pollution, increased wear of vehicle mechanical parts, driving stress and passenger discomfort. The platooning of vehicles could be the solution to this problem by enforcing them to follow each other and to maintain a safe distance between them. The advantages brought by this solution depend on ensuring the string stability of the vehicle platoon. In this paper the leader-follower system is employed to illustrate the stop-and-go waves mitigation. Several controllers (P, PI) were designed based on the conditions that have to be met in order to ensure the string stability of the vehicle platoon and comparisons were made with a controller based on the driver behavior.

关键词： Vehicles Mobile robots Accidents Stability criteria Transfer functions

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Uniformity and correlation test parameters for random numbers generators

Uniformity and correlation test parameters for random number...

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International Conference on system Theory, control, and Computing (ICSTCC)

作者： Iulian Petrila Vasile Manta Florina Ungureanu Faculty of Automatic Control and Computer Engineering “Gheorghe Asachi” Technical University of Iasi Iasi Romania Interdisciplinary Research Department “Alexandru Ioan Cuza” University of Iasi Iasi Romania

In this study we propose a series of test parameters for random number generators in order to analyze the uniformity and the degree of correlation of generated numbers. The present analysis was applied to a series of standard generators used in libraries of the usual programming languages such as: C/C++, Java and Fortran. Besides using some standard tests, new parameters that provide a more adequate description of uniformity and correlation are proposed. The analysis attempts to explain the different results obtained in simulations performed with different types of generators and to outline the different degree of uniformity and correlation of the numbers produced by these generators. The uniformity and correlation properties were analyzed both independently and together through integrants parameters. The analysis revealed that high sizes of storage and representation or high periodicity of the random number generators does not offer at the same time both high uniformity and less correlation of random numbers packets with different sizes.

关键词： Generators Correlation Vectors Standards Java Correlation coefficient Libraries

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Scheduling algorithm based on agreement protocol for cloud systems

Scheduling algorithm based on agreement protocol for cloud s...

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13th International Conference on Algorithms and Architectures for Parallel Processing, ICA3PP 2013

作者： Tutueanu, Radu-Ioan Pop, Florin Vasile, Mihaela-Andreea Cristea, Valentin University Politehnica of Bucharest Computer Science Department Faculty of Automatic Control and Computers Romania

ISBN: (纸本)9783319038889

Task scheduling algorithms have a huge impact by handling and executing users' requests in a data-center that serves a Cloud system. A problem very close to the industry is the capability to estimate costs, especially when switching from one provider to another. In this paper we introduce an agreement-based scheduling algorithm, aimed to bring an adaptive fault tolerant system. For the agreement protocol we proposed a 3-Tier structure of resources (hosts and VMs). Then an adaptive mechanism for agreement establishment is described. The scheduling algorithm considers workload distribution, resources heterogeneity, transparency, adaptability and also the ease to extend by combining with other scheduling algorithms. Based on simulation experiments, we can draw the conclusion that an agreement based algorithm improves both scheduling in Cloud and the mapping of SLAs at lower levels, possibly ensuring the same cost on data-centers belonging to different providers. © Springer International Publishing Switzerland 2013.

关键词： Scheduling algorithms

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Considerations on the information and entropy of ordinal data

Considerations on the information and entropy of ordinal dat...

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International Conference on system Theory, control, and Computing (ICSTCC)

作者： Iulian Petrila Florina Ungureanu Vasile Manta Faculty of Automatic Control and Computer Engineering “Gheorghe Asachi” Technical University of Iasi Iasi Romania Interdisciplinary Research Department “Alexandru Ioan Cuza” University of Iasi Iasi Romania

This study attempts to establish methods for characterizing the complexity of ordinal data through the information and entropy parameters. In this respect, there were examined the methods for measuring the complexity of data with similar statistical characteristics and the parameters that can make the difference between them were established. For this purpose, the analysis was applied to three data sets with identical overall statistical characteristics but with different order of elements, respectively incremental, random and oscillatory incremental data. The analysis highlighted that it is necessary to include the information and entropy parameters for different variation orders of data elements. In this regard new parameters have been proposed, based on information and entropy expressions that describe, in an adequate way, the complexity of ordinal data.

关键词： Entropy Complexity theory Data mining Information theory Transforms Correlation Noise

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Do Not Cancel My Race with Cyber-Physical systems

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IFAC Proceedings Volumes 2014年第3期47卷 4346-4351页

作者： Constantin B. Zamfirescu Bogdan-Constantin Pirvu Matthias Loskyll Detlef Zuehlke German Research Center for Artificial Intelligence (DFKI) Innovative Factory Systems Trippstadter Strasse 122 Kaiserslautern Germany Lucian Blaga University of Sibiu Faculty of Engineering Department of Computer Science and Automatic Control Emil Cioran 17 Sibiu Romania

To engineer the factory of the future the paper argues for a reference model that is not necessary restricted to the control component, but integrates the physical and human components as well. This is due to the real need to accommodate the latest achievements in factory automation where the human is not merely playing a simple and clear role inside the control-loop, but is becoming a composite factor in a highly automated system (“man in the mesh”). The concept is demonstrated by instantiating the anthropocentric cyber-physical reference architecture for smart factories (ACPA4SF) in a concrete case study that needs to accommodate the ongoing researches from the SmartFactory KL facility (e.g. augmented reality, mobile interaction technology, virtual training of human operators).

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Embedding of Nonlinear systems in a Linear Parameter-Varying Representation

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IFAC Proceedings Volumes 2014年第3期47卷 6907-6913页

作者： Hossam S. Abbas Roland Tóth Mihály Petreczky Nader Meskin Javad Mohammadpour Department of Electrical Engineering College of Engineering Qatar University PO Box 2713 Doha Qatar Electrical Engineering Department Faculty of Engineering Assiut University Assiut Egypt Control Systems Group Eindhoven University of Technology P.O. Box 513 5600 MB Eindhoven The Netherlands Department of Computer Science and Automatic Control Ecole des Mines de Douai 59508 Douai France Intelligent Control Systems Lab College of Engineering The University of Georgia Athens GA 30602 USA

This paper introduces a systematic approach to synthesize linear parameter-varying (LPV) representations of nonlinear (NL) systems which are originally defined by control affine state-space representations. The conversion approach results in LPV state-space representations in the observable canonical form. Based on the relative degree concept of NL systems, the states of a given NL representation are transformed to new coordinates that provide its normal form. In the SISO case, all nonlinearities of the original system are embedded in one NL function which is factorized to construct the LPV form. An algorithms is proposed for this purpose. The resulting transformation yields an LPV model where the scheduling parameter depends on the derivatives of the inputs and outputs of the system. In addition, if the states of the NL model can be measured or estimated, then the procedure can be modified to provide LPV models scheduled by these states. Examples are included for illustration.

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Image vectorization on modern architectures

Image vectorization on modern architectures

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2013 IEEE 9th International Conference on Intelligent Computer Communication and Processing, ICCP 2013

作者： Slusanschi, Emil Lupescu, Grigore Computer Science and Engineering Departament Faculty of Automatic Control and Computers University Politehnica of Bucharest Bucharest Romania

ISBN: (纸本)9781479914937

This work presents an image vectorization application aimed to exploit features found in most of today's modern architectures. Design decisions supported by performance results are presented along with use cases for the proposed solution. We will present the algorithm, the target architectures and threading models, as well as a number of optimization techniques. Finally results of both low power SoC and high performance multicore processors are discussed. © 2013 IEEE.

关键词： system-on-chip

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Sliding mode fuzzy observers and neural networks applied to solve fault detection and isolation problem

Sliding mode fuzzy observers and neural networks applied to ...

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IEEE International Autumn Meeting on Power, Electronics and Computing (ROPEC)

作者： Juan Anzurez-Marin Elisa Espinosa-Juárez Bernardino Castillo-Toledo Electrical Engineering Faculty Universidad Michoacana de San Nicolas de Hidalgo Morelia Michoacén México Department of Automatic Control CINVESTAV-IPN Unidad Guadalajara Gnadalajara Jalisco Mexico

In this paper, non-linear systems (hydraulic tank configurations) were analyzed using a technique of fault detection and isolation based on a Takagi-Sugeno fuzzy model. The system state vector was obtained by means of sliding mode observers, and then the signal-residual is generated by comparing the estimated and measured outputs. The isolation problem was solved using Neural Networks. From the resulting active or inactive signal-residuals, the faulted elements of the system are easily identified. The method proposed represents a hybrid fault diagnosis technique.

关键词： Observers Neural networks Mathematical model Vectors Fault diagnosis Takagi-Sugeno model Actuators

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Decentralized modeling of road traffic

Decentralized modeling of road traffic

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2013 2nd International Conference on systems and Computer Science, ICSCS 2013

作者： Dimon, Catalin Dauphin-Tanguy, Genevieve University Politehnica of Bucharest Faculty of Automatic Control and Computers Department of Automatic Control and System Engineering Splaiul Independentei 313 060042 Bucharest Romania Ecole centrale de Lille Cité Scientifique CS 20048 59651 Villeneuve d'Ascq Cedex France

ISBN: (纸本)9781479920204

Road traffic is considered as a complex system organized in a decentralized structure composed of three levels. At the highest level of complexity we have a traffic region, considered as a part of a city's road infrastructure. At the next level, the region is decomposed into traffic objects represented by road sections and intersections. At the last level of complexity we have the road segments that are parts of a road section. The traffic is considered in a macroscopic representation and the modeling for the different components of the road region is achieved by employing techniques from fluid mechanics. The results are verified in simulation, based on traffic data. © 2013 IEEE.

关键词： Roads and streets

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Direct and indirect adaptive regulation strategies for rejection of time varying narrow band disturbances applied to a benchmark problem

Direct and indirect adaptive regulation strategies for rejec...

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2013 12th European control Conference, ECC 2013

作者： Airimitoaie, Tudor-Bogdan Castellanos Silva, Abraham Landau, Ioan Dore Control System Department GIPSA-lab St. Martin-d'Héres 38402 France Faculty of Automatic Control and Computers University Politehnica of Bucharest Bucharest 060042 Romania

ISBN: (纸本)9783033039629

The paper will compare the performances which can be obtained using a direct adaptive regulation scheme based on the Youla-Kučera (YK) parametrization of the controller and using an adaptive finite impulse response (FIR) filter for implementing the internal model of the disturbance with a new indirect adaptive regulation scheme. The main features of this new scheme are: (i) the use of adaptive Band-stop Filters (BSFs) tuned at the frequencies of the disturbance instead of the Internal Model Principle (IMP) and (ii) a procedure for direct identification of frequencies contained in the disturbance. The use of adaptive BSFs allows to introduce the desired attenuation of the disturbance (instead of total rejection) and allows to get a much better shaping of the output sensitivity function (to meet the specification for the tolerated amplification outside the frequencies of the disturbance). The two approaches are comparatively evaluated on the benchmark simulator and on the benchmark active vibration control system. © 2013 EUCA.

关键词： FIR filters

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