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Decentralized state estimation in connected systems *

IFAC Proceedings Volumes 2013年第2期46卷 421-426页

作者： Alessandro Pilloni Alessandro Pisano Elio Usai Purushothama Prathyush Menon Christopher Edwards Dept. of Electrical and Electronic Engineering (DIEE) University of Cagliari Cagliari Italy College of Engineering Mathematics and Physical Sciences University of Exeter United Kingdom Control and Instrumentation Research Group University of Leicester Leicester United Kingdom

This paper considers the problem of state estimation and unknown input reconstruction of a class of connected heterogeneous LTI MIMO systems. Local high order sliding mode observers at each node of the network are designed for this purpose. The proposed method, under some network structural conditions, is inherently robust, nonlinear and totally independent of the time-varying network topology. Knowledge of the number of nodes that belong to the network is not required. At the supervisory level, decentralized control signals are computed based on the state estimates in order to operate the networking synchronization. By mean of simulation, the effectiveness of the proposal procedure is shown.

关键词： Observers for linear systems Complex systems Structural properties

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A study on Low-Voltage DC circuit breakers

A study on Low-Voltage DC circuit breakers

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IEEE International Symposium on Industrial electronics (ISIE)

作者： Sungmin Lee Hyosung-Kim Dept. of Electrical and Electronic and Control Engineering Kongju National University Cheonan South Korea Div. of Electrical Kongju National University Cheonan South Korea

ISBN: (纸本)9781467351942

Recently, DC distribution systems become hot issues since DC type loads increase rapidly according to the expansion of IT equipment such as computers, servers, and digital devices; DC type loads will cover 50% for all electricity loads in 2020 which was mere 10% in 2000 [1,2]. DC distribution systems are also accelerated by the expansion of renewable power systems since they are easy to be interfaced with DC grids rather than AC grids. However, removing the fault current in DC grids is comparably difficult since the DC current has non zero-crossing point like in AC current [3]. Thus, developing dedicated DC circuit breakers for DC grids is necessary to get safety for human and electrical facilities[4]. Magnet arc extinguishing method is proper to small size DC circuit breakers [5,6]. However, simple magnet arc extinguishing method is not enough to break inductive fault currents. This paper proposed a novel DC circuit breaker against inductive fault current defined by IEEE C37.14-2004 Standard for Low-Voltage DC Power Circuit Breakers Used in Enclosures. The performance of the proposed DC circuit breaker was verified by an experimental circuit breaker test system built in this research.

关键词： Circuit breakers Magnetic circuits Magnetic flux Inductors Mathematical model Equations Fault currents

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Wireless Sensor Networks Clock Synchronization with Selective Convergence Rate

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IFAC Proceedings Volumes 2013年第10期46卷 146-151页

作者： Francesco Lamonaca Andrea Gasparri Emanuele Garone Dept. of Informatics Models Electronic and Systems University of Calabria Ponte Pietro Bucci 87040 Rende (CS) Italy Dept. of Engineering University of “Roma Tre” Via della Vasca Navale 79 Roma 00146 Italy Faculty of Applied Science Control and Systems Analysis Department Université Libre de Bruxelles 1050 Brussels Belgium

This paper focuses on the Wireless Sensor Network (WSN) synchronization problem for event-driven measurement applications. The objective is twofold: i) to provide high accuracy in the area where an event is detected, ii) to ensure a long network life time. These two objectives are conflicting. In fact, to increase the synchronization accuracy packets must be exchanged at higher rate, thus affecting the network lifetime. In several interesting applications a trade-off can be achieved based on the observation that, if the goal is to observe a localized event, only the portion of the network surrounding the detected event requires a higher accuracy. The proposed algorithm represents a formalization of this idea. Simulations are done to show the effectiveness of the proposed algorithm.

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Self-explanatory Convex Sparse Representation for Image Classification

Self-explanatory Convex Sparse Representation for Image Clas...

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IEEE International Conference on Systems, Man, and Cybernetics

作者： Bao-Di Liu Yu-Xiong Wang Bin Shen Yu-Jin Zhang Yan-Jiang Wang Wei-Feng Liu College of Information and Control Engineering China University of Petroleum Qingdao 266580 China School of Computer Science Carnegie Mellon University Pittsburgh PA 15213 USA Dept. of Computer Science Purdue University West Lafayette IN 47907 USA Dept. of Electronic Engineering Tsinghua University Beijing 100084 China

ISBN: (纸本)9781479906505

Sparse representation technique has been widely used in various areas of computer vision over the last decades. Unfortunately, in the current formulations, there are no explicit relationship between the learned dictionary and the original data. By tracing back and connecting sparse representation with the K-means algorithm, a novel variation scheme termed as self-explanatory convex sparse representation (SCSR) has been proposed in this paper. To be specific, the basis vectors of the dictionary are refined as convex combination of the data points. The atoms now would capture a notion of centroids similar to Kmeans, leading to enhanced interpretability. Sparse representation and K-means are thus unified under the same framework in this sense. Besides, an appealing property also emerges that the weight and code matrices both tend to be naturally sparse without additional constraints. Compared with the standard formulations, SCSR is easier to be extended into the kernel space. To solve the corresponding sparse coding subproblem and dictionary learning subproblem, block-wise coordinate descent and Lagrange multipliers are proposed accordingly. To validate the proposed algorithm, it is implemented in image classification, a successful applications of sparse representation. Experimental results on several benchmark data sets, such as UIUC-Sports, Scene 15, and Caltech-256 demonstrate the effectiveness of our proposed algorithm.

关键词： Convex hull Sparse representation Coordinate descent Image classification Image classification sparse representation convex hull images computer vision Dictionaries as Topic Convexity

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Collision mitigation for crossing traffic in urban scenarios

Collision mitigation for crossing traffic in urban scenarios

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IEEE Symposium on Intelligent Vehicle

作者： Philip Heck Jan Bellin Martin Matoušek Stefan Wonneberger Ondřej Sychrovský Radim Šára Markus Maurer Dept. of Driver Assistance Systems and Integrated Safety Volkswagen Group Research Wolfsburg Germany Dept. of Powertrain developement Volkswagen AG Wolfsburg Germany Institute of Control Engineering Department Electronic Vehicle Systems Technical University of Braunschweig Braunschweig Germany Department of Cybernetics Czech Technical University in Prague Czech Republic Dept. Electronic Vehicle Systems Technical University Braunschweig Braunschweig Germany

Current collision mitigation systems focus on rear end collisions. To address the full spectrum of real world accidents, these systems will have to be enhanced to cover more traffic situations. Vehicle to vehicle accidents in crossing traffic situations make up around 25% of accidents in Germany. This paper discusses the requirements and differences compared to rear-end collisions. Presented here is an action concept that takes into account how the impact configuration is changed by breaking the host (impacting) vehicle. Based on this concept the requirements for the detection of crossing traffic were derived. These requirements were met by developing a video system based on a monocular wide field of view camera. It is further shown how this action concept and sensor were integrated into a demonstrator vehicle and evaluated in full scale testing.

关键词： Vehicles Accidents Wheels Roads Injuries Collision mitigation Friction

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Pseudo-recursive Trapezoidal Rule for the Numerical Solution of Linear Fractional Differential Equations *

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IFAC Proceedings Volumes 2013年第1期46卷 641-646页

作者： Alessandro Pisano Roberto Garrappa Davide Nessi Milan R. Rapaić University of Cagliari Dept. of Electrical and Electronic Engineering (DIEE) Università degli Studi di Bari Dipartimento di Matematica Via E. Orabona n. 4 70125 Bari Italy Faculty of Technical Sciences Computing and Control Dept. University of Novi Sad Trg Dositeja Obradovića 6 21000 Novi Sad Serbia

This paper presents an extension of the trapezoidal integration rule, that in the present work is applied to devise a pseudo-recursive numerical algorithm for the numerical evaluation of fractional-order integrals. The main benefit of pseudo recursive implementation arises in terms of higher accuracy when the algorithm is run in the “short memory” version. The rule is suitably generalized in order to build a numerical solver for a class of fractional differential equations. The algorithm is also specialized to derive an efficient numerical algorithm for the on-line implementation of linear fractional order controllers. The accuracy of the method is theoretically analyzed and its effectiveness is illustrated by simulation examples.

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3D imaging and visualization: An overview of recent advances

3D imaging and visualization: An overview of recent advances

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2013 12th Workshop on Information Optics, WIO 2013

作者： Javidi, Bahram Cho, Myungiin Moon, Inkyu Anand, Arun Martinez-Corral, Manuel Stern, Adrian Mahalanobis, Abhijit Zalevsky, Zeev University of Connecticut Electrical and Computer Engineering Dept. 371 Fairfield Road Unit 4157 Storrs CT 06269-4157 United States Department of Electric Electronic and Control Engineering Hankyong National University Kyonggi-do 456-749 Korea Republic of School of Computer Engineering Chosun University 375 Seosuk-dong Dong-gu Gwangju 501-759 Korea Republic of Applied Physics Dept Faculty of Technology and Engineering MS University of Baroda Vadodara 39001 India Department of Optics University of Valencia c/ Dr. Moliner 50 E-46100 Burjassot Spain Department of Electro-Optics Engineering Ben-Gurion University of the Negev Beer-Sheva 84105 Israel Lockheed Martin Missiles and Fire Control Orlando FL 32819 United States Faculty of Engineering Bar-Ilan University Ramat-Gan 52900 Israel

ISBN: (纸本)9781479907687

This paper presents an overview of our published work on physical principles, applications, and advances in integral imaging and digital holography. Various approaches for image capture, image reconstruction, and 3D display methods are overviewed. Applications including 3D underwater imaging, 3D imaging in photon-starved environments, 3D tracking of occluded objects, 3D optical microscopy, and 3D polarimetric imaging are reviewed. © 2013 IEEE.

关键词： Three dimensional displays

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A method for solving inverse kinematics of PUMA560 manipulator based on PSO-RBF network

A method for solving inverse kinematics of PUMA560 manipulat...

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2012 8th International Conference on Natural Computation, ICNC 2012

作者： Li, Zhe Ming Li, Chun Gui Lv, Shao Jiao Dept. of Electronic Information and Control Engineering Guangxi University of Technology Liuzhou China Department of Computer Engineering Dept. of Electronic Information and Control Engineering Guangxi University of Technology Liuzhou China

ISBN: (纸本)9781457721311

This paper describes the use of particle swarm algorithm and k-nearest neighbor method to optimize the process of radial basis function (RBF) network and we use the Denavit-Hartenberg (DH) method to research PUMA560 robotics, the results of the forward kinematics is derived as the RBF network training samples. We use six identical RBF network of twelve-input, single output, to achieve a PUMA560 inverse kinematics calculation. Simulation results show that the results obtained with this method has high accuracy and fast convergence. © 2012 IEEE.

关键词： Radial basis function networks

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Design of a Nonlinear Dynamic Inversion controller for Trajectory Following and Maneuvering for Fixed Wing Aircraft

Design of a Nonlinear Dynamic Inversion Controller for Traje...

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IEEE Symposium on Computational Intelligence for Security and Defense Applications

作者： Abhay A. Pashilkar Shaik Ismail Ramakalyan Ayyagari Narasimhan Sundararajan Scientists Flight Mechanics and Control Division National Aerospace Laboratories Bangalore - 560017 India Prof. Dept. of Instrumentation and Control Engg. National Institute of Technology Tiruchirappalli India Prof. (retd) School of Electrical & Electronic Engineering Nanyang Technological University Singapore 639798

ISBN: (纸本)9781467359108

This paper presents the design of a robust linear controller that can be used for trajectory following and maneuvering of fixed-wing aircraft using Nonlinear Dynamic Inversion (NDI) principles. The design addresses control coupling to exploit multiple redundant controls. It can also be easily extended to state decoupling. The design procedure exploits the nature of the equations of motion written in the wind axis resulting in a cascaded linear controller structure with inner and outer loops. A systematic methodology is evolved which uses only the relevant stability and control derivatives in the control synthesis, as opposed to the inversion of the complete nonlinear equations used in conventional NDI designs. The tuning of the control gains is based on the requirements of adequate trajectory following and robustness to control surface failures. Finally, it is shown how a series of controllers can be derived depending on the sensor complement available on the aircraft. The proposed approach is ideal for fixed-wing Unmanned Aerial Vehicles (UAVs).

关键词： Nonlinear Dynamic Inversion fixed-wing aircraft trajectory following unmanned ariel vehicle

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A fast macroblock mode decision algorithm for MVC based on SVM

A fast macroblock mode decision algorithm for MVC based on S...

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2012 8th International Conference on Intelligent Information Hiding and Multimedia Signal Processing, IIH-MSP 2012

作者： Dou, Huan Deng, Zhipin Jia, Kebin Dept. of Electronic Information and Control Engineering Beijing University of Technology Beijing China

ISBN: (纸本)9780769547121

This paper presents a fast macroblock mode decision algorithm based on Supporting Vector Machine (SVM) for MVC on the JMVC platform. The corresponding coded information of the reference view is used to design a three-stage SVM classifier for the proposed mode decision algorithm. Experimental results indicate that the proposed algorithm can save remarkable encoding time while maintaining nearly the same visual quality of the original sequences. © 2012 IEEE.

关键词： Classification (of information)

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