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International Journal of control and Automation 2015年第11期8卷 113-126页

作者： Quoc, Dung Duong Sun, Jinwei Le, Van Nhu Dept. of Automatic test and control Harbin Institute of Technology Harbin China Research center for Space Optics Engineering Harbin Institute of Technology China Le Qui Don Technical University Cau Giay Ha Noi Viet Nam

Attitude estimation has a wide range of applications including aerial (UAVs for example), underwater (ROVs for instance), navigation systems, robotics, games, augmented reality system, industrial and so on. Extensive research over decades in this field resulted in a number of powerful estimators;complex like Kalman based algorithms as well as simple such as complementary filters & the kinds. For applications where computational simplicity is of prime concern, complementary filters have proven efficiency. This paper presents a comparative study of computationally simple algorithms naming Explicit Complementary Filter (ECF) and Gradient Descent based Complementary Filter (GDCF) along with computationally demanding extended Kalman filter-a de-facto standard for attitude estimation so far, regarding attitude estimation based on MEMS IMU. An alternative would be the variants of complementary filter;sufficiently efficient and simple scheme to avoid computational *** of these estimators is evaluated for Euler angle estimation using both simulated data from Matlab and experimental data from MPU6050 IMU. The assessment is based on the root mean square error computation for these algorithms. Moreover, the algorithms adjustable parameters were exploited for a range of values in the hunt for perfection. © 2015 SERSC.

关键词： Data fusion

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A new DSC-PLL using Recursive Discrete Fourier Transform for Robustness to Frequency Variation

A new DSC-PLL using Recursive Discrete Fourier Transform for...

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Annual IEEE Applied Power Electronics Conference and Exposition

作者： Jaedo Lee Hanju Cha Dept. of Instrument control & Electrical System Korea Institute of Nuclear Safety Daejeon Korea Dept. of Electrical Engineering Chungnam National University Daejeon Korea

ISBN: (纸本)9781467395519

In this paper, a new DSC-PLL(Delayed Signal Cancellation Phase Locked Loop) with FLL(Frequency Locked Loop) based on RDFT(recursive discrete fourier transform) method is proposed for coping with frequency variation. This method shows significant performance improvement for detection of fundamental positive sequence component voltage when the grid voltage is polluted by grid harmonics and frequency variation. The frequency detection technique of DSC-PLL tracks frequency drift by the RDFT. These compensation algorithms can correct for discrepancies of changing the frequency within maximum 28ms and improve traditional DSC-PLL. To verify feasibility of the proposed DSC-PLL, Matlab/Simulink results show good agreement with the analysis.

关键词： DSC-PLL Robustness Frequency Variation

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Power decoupling method comparison of isolated single-phase matrix converters using center-tapped transformer with PDM 7

Power decoupling method comparison of isolated single-phase ...

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7th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2015

作者： Takaoka, Nagisa Takahashi, Hiroki Itoh, Jun-Ichi Chiang, Goh Teck Sugiyama, Takahide Sugai, Masaru Dept. of Electrical Engineering Nagaoka University of Technology Japan Dept. of Science of Technology Innovation Nagaoka University of Technology Nagaoka Niigata Japan Dept. of System and Electronics Engineering Dept. II Power Electronics and Control Lab. Toyota Central RandD Labs. INC. Japan

ISBN: (纸本)9781467371506

This paper presents an isolated type of single-phase matrix converter topology for PHV/EV on-board battery chargers. The proposed converter is comprised of a full bridge inverter, a high frequency transformer and a matrix converter. Due to the lack of DC link bus in matrix converter, in order to suppress the power fluctuation, a power decoupling method which only employs a center-tapped high frequency transformer and a small LC buffer where requires no additional switches is applied. On the other hand, the matrix converter applies PDM (Pulse Density Modulation) which achieve ZVS (zero voltage switching) in order to generate a 50Hz/60Hz sinusoidal waveform at the grid side. As a result, this converter shows promising features small size and high efficiency. In this paper, by harmonic analysis, the effectiveness of power decoupling method is evaluated in two cases: the PDM based on the PWM as a conventional method and the PDM based on the delta-sigma conversion. In the experimental results, the power decoupling method with the PDM based on the delta-sigma conversion reduces the DC bus current ripple by 84.8% comparing to the case where the power decoupling method is not applied, while the output voltage distortion is reduced by 64.1% compared with that of the PDM based on the PWM is applied. © 2015 IEEE.

关键词： Matrix converters

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Performing Automated Experiments with EJsS Laboratories

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IFAC-PapersOnLine 2015年第29期48卷 134-139页

作者： Galan, Daniel Heradio, Ruben Torre, Luis De La Dormido, Sebastian Esquembre, Francisco Dept. of Computer Science and Automatic Control Universidad Nacional de Educación A Distancia Juan Del Rosal 16 MadridE-28040 Spain Dept. of Software Engineering and Computer Systems Universidad Nacional de Educación A Distancia Juan del Rosal 16 MadridE-28040 Spain Dept. of Mathematics Universidad de Murcia Campus de Espinardo MurciaE-30071 Spain

Existing software allows the development of high quality interactive applications that permit their implementation in laboratories, both virtual and remote. To perform an experiment, the user needs to know how these applications are implemented. In addition, when coding an experiment, the user has to manage the language in which the simulation was created and needs to handle fluently a simulation language just to perform experiments. In the academic field these simulations are used to create virtual and remote laboratories. The authors propose a tool to develop automated experiments for these laboratories. It is intended that the experiments use a powerful and simple language to improve students interaction with the laboratories. That is, avoid repetitive tasks using simple algorithms, data collection and analysis of results, among other features. A new environment for the development of experiments in the authoring tool Easy Java(script) Simulations (EjsS) is proposed. It permits the decoupling of the application design phase from the experiment design. It has been equipped with a language capable of encircling all the expected commands, such as creating events, launching simultaneous applications or modifying their variables. Set with a high level layer, the language allows less experienced users to create their own experiments without having any knowledge of how the application was made. These features will be explained throughout the paper and some physic and control examples of use, as a controller for a cylindrical and a circular tank or a motion controller for a remote robot, will be given to demonstrate the potential of this new environment. © 2015, IFAC (International Federation of automatic control) Hosting by Elsevier Ltd. All rights reserved.

关键词： Java programming language Application programs Computer simulation languages Experiments Laboratories Technology transfer Easy Java(script) Simulations Experimentation Language Remote laboratories Simulations Virtual laboratories

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Agent based simulation applied to the design of control systems for emergency vehicles access

Agent based simulation applied to the design of control syst...

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International Conference on ITS Telecommunications (ITST)

作者： Monica Patrascu Andreea Ion Vlad Constantinescu Dept. of Automatic Control and Systems Engineering University Politehnica of Bucharest Romania

Traffic congestions have huge impact on urban transportation and are even more problematic when emergency vehicles are present, their fast travel requirements disrupting regular traffic. The aim of this study is to formulate an agent based simulation perspective on aiding the design of complex and distributed control systems, such as the one facilitating the arrival of the emergency vehicles to accident sites. Thus, we provide a user friendly method for validation of traffic control systems that supports interdisciplinary design. In particular, such a simulation model can be easily used by transportation engineers not acquainted with the mechanics of control systems, as it allows for empirical transfer of knowledge from the ITS field into controller synthesis methodology.

关键词： Vehicles control systems Computer architecture Roads Collaboration Microprocessors Modeling

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An end to end web service composition based on QoS preferences

UPB Scientific Bulletin, Series C: Electrical Engineering an...

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UPB Scientific Bulletin, Series C: Electrical engineering and Computer Science 2015年第3 3期77 77卷 3-16页

作者： Iordache, Raluca Moldoveanu, Florica Automatic Control and Computers Doctoral School University POLITEHNICA of Bucharest Romania Dept. of Computer Science and Engineering Faculty of Automatic Control and Computers University POLITEHNICA of Bucharest Romania

The service-oriented environment offers the opportunity to create new applications, by combining existing applications offered as services, in order to react to the business' increasing pressure of quickly delivering new applications. With a large number of web services offering the same functionality, choosing the web services that meet best the client's quality of service (QoS) requirements is a very important task. We introduce a QoS-aware end to end web service composition approach that handles all the stages from the web service discovery step, to the actual binding of the services. This approach uses our method of expressing nonfunctional preferences, which requires minimal effort on the part of the clients, but offers great flexibility in managing trade-offs. We define a QoS preferences ontology and use it in our semantic web service selection to choose an initial candidate list of services for every task in the orchestration model. Then, one concrete service is chosen from each candidate list and is boand to the corresponding task. This step involves computing and comparing the aggregated QoS of the resulting composite services. The selection is performed using a genetic algorithm.

关键词： Quality of service

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An integrated gene expression analysis approach

An integrated gene expression analysis approach

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E-Health and Bioengineering Conference

作者： Irina-Oana Petre Catalin Buiu Dept. of Automatic Control and Systems Engineering Politehnica University of Bucharest Bucharest Romania

ISBN: (纸本)9781467375467

Big data is one of the hottest topics in information science. It has become the key for biological and medical discovery and research, making developing new methods for data management, analysis and accessibility a great challenge in the field. This study proposes an integrated gene analysis approach, in terms of classification and prediction methods for understanding, analyzing and interpretation of biological data related to cancer. The final aim of this study is to predict and classify several subtypes of cancer, based on gene expression.

关键词： Big data Data mining Gene expression clustering pattern

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automatic detection of meteors in spectrograms using artificial neural networks

Automatic detection of meteors in spectrograms using artific...

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International Symposium on Applied Computational Intelligence and Informatics ( SACI)

作者： Victor Ştefan Roman Cătălin Buiu Dept. of Automatic Control and Systems Engineering Politehnica University of Bucharest Bucharest Romania

Artificial neural networks are widely used in classification problems due to their adaptability. In this paper, an original multi-layer perceptron is used to automatically detect meteors within radio recordings. The approach presented can be divided into two stages: data preparation and meteor detection. In the data preparation stage, samples are built from a number of the spectrogram's vertical lines. During the meteor detection stage, neural networks are trained using the inputs previously extracted, and their meteor detection capabilities are tested. The rate of correctly detected meteor samples by the neural networks trained in this paper is over 80%.

关键词： Spectrogram Training Artificial neural networks Neurons Airplanes Biological neural networks

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Proposed Document Frequency technique for minimizing dataset in Web crawler

Proposed Document Frequency technique for minimizing dataset...

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International Conference on Computer engineering and systems

作者： Amany M. Sarhan Ghada M. Hamissa Heba E. Elbehiry Computer &Automatic Control Dept. Tanta University Egypt Electrical Engineering Dept. KFS University Egypt

The explosive growth of webpage number on the Web has brought up some problems in the search process. One of these problems is that the general purpose search engines often return too many irrelevant results when users are searching for specific information on a given topic. Another problem is the massive increase in the number of pages to be indexed by Web search systems. In this research, two steps for Web Crawling are used to decrease these difficulties. First step is the feature selection for the datasets used. A proposed algorithm of feature selection, which uses the Document Frequency technique for the term in the category, is presented. Second step is Web page classification. Two famous techniques of Web page classification are used: (i) Support Vector Machine and (ii) Naïve Bayes Classifier. It is concluded that the proposed algorithm, using Document Frequency technique, reduces the redundancy during feature selection and increases accuracy during Web page classification. Complete evaluation is performed, in JAVA, to indicate the effectiveness of our proposed algorithm.

关键词： Classification algorithms Web pages Support vector machines Training Standards Kernel Search problems

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A self-organizing map-based approach to automatic meteor detection in radio spectrograms

A self-organizing map-based approach to automatic meteor det...

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International Conference on Electronics, Computers and Artificial Intelligence (ECAI)

作者： Victor Ştefan Roman Cătălin Buiu Dept. of Automatic Control and Systems Engineering Politehnica University of Bucharest Bucharest Romania

The automatic meteor detection solution presented in this paper uses a self-organizing map to analyze radio spectrogram data and detect the meteor samples found within. This artificial neural network is trained using data samples extracted from spectrograms of radio recordings using a rectangular sliding window. Several tests were run to find the optimal neural network topology and duration of training. The trained network is then analyzed using a new set of data and its performance is manually validated. Testing has shown that the proposed self-organizing map solution produces significant meteor detection results.

关键词： Training Spectrogram Neurons Data mining Artificial neural networks Visualization

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