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The Fourteenth International Offshore and Polar engineering Conference - ISOPE 2004

作者： Sarradin, P.-M. Sarrazin, J. Cadiou, J.F. Olu, K. Desbruyères, D. Rigaud, V. Drogou, J.F. Lecornu, F. Rolin, J.F. Vuillemin, R. Cambon-Bonavita, M.A. Sauter, E. Von Juterzenka, K. Boetius, A. Serrão Santos, R. Colaço, A. Pascoal, A. Oliveira, P. Shillito, B. Zal, F. Schultz, A. Taylor, P. Lane, D. Loke, R.E. Du Buf, H. Waldmann, C. Cormack, A. Sanfilippo, L. Masson, M. Ifremer DRO/EP Plouzané and La Seyne sur Mer France DNIS Plouzané and La Seyne sur Mer France TMSI Plouzané and La Seyne sur Mer France DRV/VP Plouzané and La Seyne sur Mer France AWI Dept. Geosystem and Project Group Deep-Sea Research Bremerhaven Germany Project Group AUV Payload Development and Deep-Sea Gradients Bremerhaven Germany Geosystem Paleoenvironment from Marine Sediments Bremerhaven Germany University of the Azores Horta Portugal Dept. of Electrical Engineering Institute for Systems and Robotics Instituto Superior Técnico Lisbon Portugal UMR CNRS 7138 Systématique Adaptation et Evolution Université Pierre et Marie Curie Paris France Equipe Ecophysiologie Station Biologique Roscoff France School of Earth Ocean and Planetary Sciences Cardiff University Cardiff United Kingdom Dept. Electrical Electronic and Computer Engineering Heriot-Watt University Edinburgh United Kingdom Dept. of Electronics and Computer Science Vision Laboratory University of Algarve Faro Portugal University of Bremen FB5/MARUM Bremen Germany SeeByte Ltd Edinburgh United Kingdom Systea Srl Anagni Italy CAPSUM Technologie GmbH Trittau Germany

The general objective of EXOCET/D is to develop, implement and test specific instruments aimed at exploring, describing, quantifying and monitoring biodiversity in deep-sea fragmented habitats as well as at identifying links between community structure and environmental dynamics. Onboard experimental devices will complement the approach, enabling experiments on species physiology. The EXOCET/D working fields include: video and acoustic imagery, in situ analysis of physico-chemical factors, quantitative sampling of macro- and micro-organisms, in vivo experiments, integration of multidisciplinary data, implementation on European deep-submersibles and a final phase of technical and scientific validation. Copyright © 2004 by The International Society of Offshore and Polar Engineers.

关键词： Submersibles

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Automatic face region tracking for highly accurate face recognition in unconstrained environments

Automatic face region tracking for highly accurate face reco...

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IEEE Conference on Advanced Video and Signal Based Surveillance (AVSS)

作者： Y.-O. Kim J. Paik Jingu Heo A. Koschan B. Abidi M. Abidi Korea Electronics and Technology Institute Puchon Gyeonggi South Korea Image Processing Laboratory Department of Image Engineering Graduate School of Advanced Imaging Science Multimedia and Film Chung-Ang University Seoul South Korea Imaging Robotics and Intelligent Systems Laboratory Department of Electrical and Computer Engineering University of Tennessee Knoxville USA

We present a combined real-time face region tracking and highly accurate face recognition technique for an intelligent surveillance system. High-resolution face images are very important to achieving accurate identification of a human face. Conventional surveillance or security systems, however, usually provide poor image quality because they use only fixed cameras to record scenes passively. We have implemented a real-time surveillance system that tracks a moving face using four pan-tilt-zoom (PTZ) cameras. While tracking, the region-of-interest (ROI) can be obtained by using a low-pass filter and background subtraction with the PTZ. Color information in the ROI is updated to extract features for optimal tracking and zooming. FaceIt/sup /spl reg//, which is one of the most popular face recognition software packages, is evaluated and then used to recognize the faces from the video signal. Experimentation with real human faces showed highly acceptable results in the sense of both accuracy and computational efficiency.

关键词： Face recognition Surveillance Real time systems Humans Cameras Intelligent systems Security Image quality Layout Low pass filters

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An overview of RoboCup-2002 Fukuoka/Busan

An overview of RoboCup-2002 Fukuoka/Busan

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作者： Asada, Minoru Obst, Oliver Polani, Daniel Browning, Brett Bonarini, Andrea Fujita, Masahiro Christaller, Thomas Takahashi, Tomoichi Tadokoro, Satoshi Sklar, Elizabeth Kaminka, Gal A. Dept. of Adaptive Machine Systems Osaka University Osaka Japan University of Koblenz-Landau Artificial Intelligence Group Koblenz Germany University of Hertfordshire Hertfordshire United Kingdom Robotics Institute Carnegie Mellon University Pittsburgh PA United States Department of Electronics Politecnico di Milano Milano Italy GMD-Japan Research Laboratory Kitakyushu Japan Department of Computer Engineering Kobe University Kobe Japan Computer Science Department Ber Ilan University Ramat Gan Israel Computer Science Department Carnegie Mellon University Pittsburgh PA United States

This article reports on the Sixth Robot World Cup Competition and Conference (RoboCup-2002) Fukuoka/Busan, which took place from 19 to 25 June in Fukuoka, Japan. It was the largest RoboCup since 1997 and held the first humanoid league competition in the world. Further, the first ROBOTREX (robot trade and exhibitions) was held with about 50 companies, universities, and institutes represented. A total of 117,000 spectators witnessed this marvelous event, To the best of our knowledge, this was the largest robotic event in history.

关键词： Artificial intelligence

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Affecting the accuracy of an active vision head 2nd

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2nd Hellenic Conference on Artificial Intelligence, SETN 2002

作者： Gasteratos, Antonios Sandini, Giulio Laboratory of Electronics Section of Electronics and Information Systems Technology Department of Electrical and Computer Engineering Democritus University of Thrace XanthiGR-671 00 Greece Laboratory for Integrated Advanced Robotics Department of Communication Computer and System Sciences University of Genoa Viale Causa 13 GenoaI-16145 Italy

ISBN: (纸本)3540434720

In any measuring system the categorization of the error generation factors leads to simplification of complex error problems and to higher suppression of the error. In this paper we categorize, quantify and analyze the errors that affect a binocular active vision head. Simulations have been made and experimental results on a high resolution pan-tilt-vergence mechanism are also proposed. As a conclusion it can be said that the system performs optimal when it is initialized so that the two cameras are perfectly aligned and perpendicular to the baseline. Small variations in the vergence angle or small horizontal deviations of the principal point alters the measurement dramatically. On the other hand, variations in pan and tilt and vertical deviations of the principal point, affect the measurement insignificantly. © Springer-Verlag Berlin Heidelberg 2002.

关键词： Errors

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Strong practical stability for a class of 2D linear systems

Strong practical stability for a class of 2D linear systems

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IEEE International Symposium on Circuits and Systems (ISCAS)

作者： K. Galkowski E. Rogers A. Gramacki J. Gramacki D. Owens Institute of Robotics and Software Engineering Technical University of Zielona Gora Poland Department of Electronics and Computer Science University of Southampton Southampton UK Institute of Computer Science and Electronics Technical University of Zielona Gora Poland Department of Automatic Control and Systems Engineering University of Sheffield UK

Linear repetitive processes are a distinct class of 2D linear systems of both theoretical and practical interest. The stability theory for these processes currently consists of two distinct concepts termed asymptotic stability and stability along the pass respectively where the former is a necessary condition for the latter. Recently applications have arisen where asymptotic stability is too weak and stability along the pass is too strong for meaningful progress to be made. This paper develops the concept of strong practical stability for such cases.

关键词： Linear systems Asymptotic stability computer science State-space methods robotics and automation Software engineering Systems engineering and theory Metals industry Iterative algorithms Electrical equipment industry

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Dynamic process initial conditions in repetitive processes. Controllability and stability analysis

Dynamic process initial conditions in repetitive processes. ...

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1999 Information, Decision and Control, IDC 1999

作者： Galkowski, K. Rogers, E. Gramacki, A. Gramacki, J. Owens, D.H. Technical University of Zielona Gora Institute of Robotics and Software Engineering Zielona Gora Poland University of Southampton Image Speech and Intelligent Systems Research Group Department of Electronics and Computer Science SouthamptonSO17 lBJ United Kingdom University of Exeter Centre for Systems and Control Engineering School of Engineering ExeterEX4 4QF United Kingdom

ISBN: (纸本)0780352564

Repetitive, or multipass, processes are a class of 2D systems of both practical and algorithmic/theoretical interest whose dynamics cannot be analysed or controlled using standard (1D) systems theory. Recently it has been shown that the modelling of the boundary conditions, also known as the process initial conditions, is a crucial feature in the analysis and control of these processes. This paper presents some further results on the effects of so-called 'dynamic' process initial conditions on the controllability and stability properties of discrete linear repetitive processes. Previous work has shown that these dynamic process initial conditions alone can destroy the stability properties of these processes. Hence their effects must be 'adequately' accounted for the process modelling stage in order to ensure that subsequent analysis does not lead to incorrect results/conclusions. The main results developed in this paper can be summarised as follows. (i) Computationally efficient stability tests which can, in effect, be applied using standard, or 1D, linear systems tests. (ii) Characterisation of so-called pass controllability in the form of matrix rank based conditions. (iii) Conditions under which the dynamic process initial conditions can be selected to ensure stability and pass controllability. © 1999 IEEE.

关键词： Controllability

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Higher order discretization of differential linear repetitive processes

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IFAC Proceedings Volumes 1999年第2期32卷 1903-1908页

作者： K. Galkowski E. Rogers A. Gramacki J. Gramacki D.H. Owens Departments of Robotics and Software Engineering/Electronics and Informatics Technical University of Zielona Gora Poland. Department of Electronics and Computer Science University of Southampton Southampton SO17 1BJ UK School of Engineering and Computer Science University of Exeter Exeter EX4 4QF UK.

Differential linear repetitive processes are a class of linear systems which can be used, for example, to model industrial processes such as long-wall coal cutting operations. The key feature of interest in this paper is the fact that information propagation in one of the two separate directions in such processes evolves continuously over a finite fixed duration and in the other it is, in effect, discrete. This paper develops discrete approximations for the dynamics of these processes and examines the effects of the approximation techniques used on two key control related properties, i.e. stability and the 2D linear systems structure of the resulting discrete stale space models.

关键词： Repetitive dynamics discrete approximations stability 2D linear systems

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Lyapunov stability theory for linear repetitive processes - The 1D equation approach

Lyapunov stability theory for linear repetitive processes - ...

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1999 European Control Conference, ECC 1999

作者： Rogers, E. Gramacki, J. Gramacki, A. Galkowski, K. Owens, D.H. Department of Electronics and Computer Science University of Southampton SouthamptonSO17 1BJ United Kingdom Department of Robotics and Software Engineering Technical University of Zielona Gora ul. Podgorna 50 Zielona Gora65-246 Poland Department of Automatic Control and Systems Engineering University of Sheffield Mappin Street SheffieldS1 3JD United Kingdom

ISBN: (纸本)9783952417355

This paper reports further development of the so-called ID Lyapunov equation based approach to the stability analysis of differential linear repetitive processes. In particular, it is shown that this approach leads to stability tests which can be implemented by computations with matrices which have constant entries, and that if the example under consideration is stable then physically meaningful information concerning one key aspect of 'transient' performance is available for no extra cost. The computational efficiency of these new stability tests against alternatives is also discussed and some areas for short to medium term further research briefly noted. © 1999 EUCA.

关键词： Linear systems

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Dynamic process initial conditions in repetitive processes. Controllability and stability analysis

Dynamic process initial conditions in repetitive processes. ...

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Information, Decision and Control (IDC)

作者： K. Galkowski E. Rogers A. Gramacki J. Gramacki D.H. Owens Institute of Robotics and Software Engineering Technical University of Zielona Góra Zielona Gora Poland Department of Electronics and Computer Science Image Speech and Intelligent Systems Research Group University of Southampton Southampton UK Institute of Computer Engineering and Electronics Technical University of Zielona Góra Zielona Gora Poland School of Engineering Centre for Systems and Control Engineering University of Exeter Exeter UK

关键词： Stability Controllability System testing Control system analysis Algorithm design and analysis Control systems Boundary conditions Process control Standards development Linear systems

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Neuromorphic ROV propulsion control based upon model-reference non-linear optimisation

Neuromorphic ROV propulsion control based upon model-referen...

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IEE Colloquium on Optimisation in Control: Methods and Applications (Ref. No. 1998/521)

作者： K. Suttiwaree J. Lucas Liverpool Univ. UK Computer Electronics & Robotics Department of Electrical Engineering and Electronics University of Liverpool Liverpool UK

Thruster propulsion is a significant component for making accurate motion control possible as well as achieving superior navigational performance of remotely operated vehicles (ROV), both for tethered and untethered classes. As a result, the contents of this paper mainly focus upon thruster functioning enhancement by forming an effective real-time closed-loop compensation. An electric-driven thruster, instrumented with drive and embedded electronics, is employed as a test-bed. Its electrical and mechanical properties are briefly described and the inherent existence of stiction (static friction) will be highlighted since such nonlinearity directly degrades the dynamic behaviour of the thruster. Therefore, a nonlinear optimisation technique, serving as a 1-step-ahead predictive controller, has been structured not only to eliminate this unwanted stiction effect, but also to have the following additional attributes: 1) to maintain commanded rotational direction, 2) to regulate angular velocity with respect to set-point, and 3) to produce a robust system with better noise immunity. The intelligent predictive algorithm is based upon a multilayer perceptron (MLP) neural network configured as a state-estimator, whereas a model-reference gives the desired response characteristic. The outcome of such combined modules will clearly outperform the classical methodologies as indicated by the comparison with: i) an ordinary predictive strategy, and ii) an industrial three-term PID regulation.

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