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Siberian Conference on control and Communications (SIBCON)

作者： Alexandra I. Khalyasmaa Dmitry I. Bliznyuk Alexey M. Romanov Automated electrical systems department Ural Federal University named after the first President of Russia B. N. Yeltsin Ekaterinburg Russia Control Problems Department Moscow State Technical University of Radio Engineering Electronics and Automation Moscow Russia

The paper is devoted to a question of overhead lines technical state assessment and overview of its implementation methods and techniques. Development of diagnostic suite for OHL state assessment on the base of quadco... 详细信息

ISBN: (纸本)9781479971046

关键词： Wires Maintenance engineering Inspection Poles and towers Propellers Reliability Organizations

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MEMS-based wavelength and orbital angular momentum demultiplexer for on-chip applications

MEMS-based wavelength and orbital angular momentum demultipl...

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Conference on Lasers and Electro-Optics Europe

作者： Vladimir S. Lyubopytov Alexey P. Porfirev Stanislav O. Gurbatov Sujoy Paul Martin F. Schumann Julijan Cesar Mohammadreza Malekizandi Mohammad T. Haidar Martin Wegener Arkadi Chipouline Franko Kuppers Institute for Microwave Engineering and Photonics Technische Universität Darmstadt Merckstr. 25 64283 Darmstadt Germany Department of Photonics Engineering Technical University of Denmark (DTU) Ørsteds Plads 343 2800 Kgs. Lyngby Denmark Samara National Research University Moskovskoye shosse 34 Samara 443086 Russia Image Processing Systems Institute - Branch of the Federal Scientific Research Centre “Crystallography and Photonics” of Russian Academy of Sciences Molodogvardejskaya St. 151 Samara 443001 Russia Far Eastern Federal University 8 Sukhanova Str. Vladivostok 690041 Russia Institute of Automation and Control Processes Far Eastern Branch of the Russian Academy of Sciences (IACP FEB RAS) Radio Str. 5 Vladivostok 690041 Russia Institute of Nanotechnology Karlsruhe Institute of Technology (KIT) 76021 Karlsruhe Germany Institute of Applied Physics Karlsruhe Institute of Technology (KIT) 76128 Karlsruhe Germany

ISBN: (纸本)9781509067374

We demonstrate a new tunable MEMS-based WDM&OAM Fabry-Perot filter for simultaneous wavelength (WDM) and Orbital Angular Momentum (OAM) (de)multiplexing. The WDM&OAM filter is suitable for dense on-chip integration and dedicated for the next generation of optical interconnects utilizing all three degrees of freedom of the electromagnetic waves: wavelength, polarization, and OAM. The WDM&OAM filter consists of two Distributed Bragg Reflectors (DBRs), (see Fig. 1a,b): a bottom one fixed to the substrate and a movable top MEMS DBR. An applied tuning current, changing the resonator length, extends the top DBR and hence selects the central filter wavelength. A spiral phase mask on the top switches the OAM order by ±1, ±2, etc. For a detailed description of the structure and fabrication of the device, please refer to [1,2]. The MEMS filter shows a full-width at half-maximum (FWHM) bandwidth of about 0.2 nm and a free spectral range (FSR) of about 126 nm. The phase mask provides sufficient OAM state purity in a 35 nm window around 1550 nm, covering well the whole C-band.

关键词： Bragg reflectors Distributed Bragg reflectors Optical angular momentum Optical interconnects Phase modulation Spiral phase

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Active fault isolation in MIMO systems 19

Active fault isolation in MIMO systems

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19th IFAC World Congress on International Federation of Automatic control, IFAC 2014

作者： Niemann, Henrik Poulsen, Niels Kjølstad Department of Electrical Engineering Automation and Control Technical University of Denmark Building 326 LyngbyDK-2800 Kgs. Denmark Dept. of Applied Mathematics and Computer Science Section for Dynamical Systems Technical University of Denmark LyngbyDK-2800 Kgs. Denmark

ISBN: (纸本)9783902823625

Active fault isolation of parametric faults in closed-loop MIMO systems are considered in this paper. The fault isolation consists of two steps. The first step is group-wise fault isolation. Here, a group of faults is isolated from other possible faults in the system. The group-wise fault isolation is based directly on the input/output signals applied for the fault detection. It is guaranteed that the fault group includes the fault that had occurred in the system. The second step is individual fault isolation in the fault group. Both types of isolation are obtained by applying dedicated auxiliary inputs and the associated residual outputs. © IFAC.

关键词： Fault detection

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Triangular Fuzzy Number Representation of Relations in Fuzzy Cognitive Maps

Triangular Fuzzy Number Representation of Relations in Fuzzy...

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IEEE International Conference on Fuzzy systems

作者： Engin Yesil M. Furkan Dodurka Leon Urbas Control and Automation Engineering Department Istanbul Technical University Istanbul Turkey Chair of Process Control Systems Engineering Technology University of Dresden Germany

In this paper, the conventional Fuzzy Cognitive Maps (FCMs), which has already achieved success in many fields, are extended by using triangular fuzzy numbers (TFNs). The advantage of FCMs is that they are relatively easy to construct and parameterize and are capable of handling the full range of system feedback structure, including density-dependent effects. However, it is a well-known fact that there are some limitations inherent in FCM, such as lack of adequate capability to handle uncertain information and lack of enough ability to aggregate the information from different sources. Triangular fuzzy numbers which are represented by a triplet has the capacity to represent the uncertain relations between the concepts. In this context, the weight matrix representing the causal relations are enhanced to a fuzzy weight matrix that has TFNs as element. As a result of this improvement, the dynamic reasoning algorithm of the conventional FCM is improved for the use of the proposed novel FCM. The proposed FCM is presented via four simulations and the results are discussed. The results of the simulation study shows how easily the uncertain information can be represented and interpreted by the proposed FCM design methodology.

关键词： Uncertainty Vectors Cognition Fuzzy sets Pragmatics Fuzzy cognitive maps Modeling

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Optimistic Planning with a Limited Number of Action Switches for Near-Optimal Nonlinear control

Optimistic Planning with a Limited Number of Action Switches...

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IEEE Annual Conference on Decision and control

作者： Koppany Mathe Lucian Busoniu Remi Munos Bart De Schutter Automation Department Technical University of Cluj-Napoca Romania INRIA Lille France Delft Center for Systems and Control Delft University of Technology the Netherlands

ISBN: (纸本)9781467360890

We consider infinite-horizon optimal control of nonlinear systems where the actions (inputs) are discrete. With the goal of limiting computations, we introduce a search algorithm for action sequences constrained to switch at most a given number of times between different actions. The new algorithm belongs to the optimistic planning class originating in artificial intelligence, and is called optimistic switch-limited planning (OSP). It inherits the generality of the OP class, so it works for nonlinear, nonsmooth systems with nonquadratic costs. We develop analysis showing that the switch constraint leads to polynomial complexity in the search horizon, in contrast to the exponential complexity of state-of-the-art OP;and to a correspondingly faster convergence. The degree of the polynomial varies with the problem and is a meaningful measure for the difficulty of solving it. We study this degree in two representative, opposite cases. In simulations we first apply OSP to a problem where limited-switch sequences are near-optimal, and then in a networked control setting where the switch constraint must be satisfied in closed loop.

关键词： Switches control setting SEARCHING ALGORITHM Polynomial nonlinear control Action

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Architecture of information system for monitoring of photovoltaic plants

Architecture of information system for monitoring of photovo...

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Iberian Conference on Information systems and Technologies (CISTI)

作者： António Nunes Pereira Paulo Tomé Paulo Moisés Costa José Pascoal Instituto Politecnico de Viseu Viseu Viseu PT Martifer Solar Technical Department - Automation and Control Systems Oliveira de Frades Portugal

The monitoring and supervision systems are crucial to the operation of photovoltaic plants (PV), allowing the gathering of data about its operation. This data, after proper processing, allow to obtain performance indicators, the establishment of comparisons, the identification of behavior trends, the detection and location of malfunctions in equipment / systems and the definition of optimized maintenance plans. The most obvious consequence of the use of monitoring and supervision systems is the improvement of the technical and economical performance of PV plants. This article presents an architecture of a system able to provide information about the operation of a PV plant, regardless of its size, in a mobile device. The proposed architecture includes important aspects concerning the design of information systems, namely concerning the system flexibility and security.

关键词： Monitoring Androids Humanoid robots Information systems Photovoltaic systems XML

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Longitudinal control of vehicle platoons for stop-and-go waves mitigation

Longitudinal control of vehicle platoons for stop-and-go wav...

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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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Active Fault Isolation in MIMO systems

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IFAC Proceedings Volumes 2014年第3期47卷 8012-8017页

作者： Henrik Niemann Niels Kjølstad Poulsen Department of Electrical Engineering Automation and Control Technical University of Denmark Building 326 DK-2800 Kgs. Lyngby Denmark Dept. of Applied Mathematics and Computer Science Section for Dynamical Systems Technical University of Denmark DK-2800 Kgs. Lyngby Denmark

关键词： Active fault isolation MIMO systems YJBK parameterization

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Phototherapy: Metal–Organic‐Framework‐Derived Mesoporous Carbon Nanospheres Containing Porphyrin‐Like Metal Centers for Conformal Phototherapy (Adv. Mater. 38/2016)

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Advanced Materials 2016年第38期28卷

作者： Shunhao Wang Lu Shang Linlin Li Yingjie Yu Chongwei Chi Kun Wang Jie Zhang Run Shi Heyun Shen Geoffrey I. N. Waterhouse Sijin Liu Jie Tian Tierui Zhang Huiyu Liu Beijing Key Laboratory of Bioprocess Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing Laboratory of Biomedical Materials Beijing University of Chemical Technology Beijing 100029 P. R. China Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco‐Environmental Sciences Chinese Academy of Sciences Beijing 100085 P. R. China University of Chinese Academy of Sciences Beijing 100049 P. R. China Beijing Institute of Nanoenergy and Nanosystems National Center for Nanoscience and Technology (NCNST) Chinese Academy of Sciences Beijing 100083 P. R. China Department of Materials Science and Engineering State University of New York at Stony Brook Stony Brook NY 11790 USA Key Laboratory of Molecular Imaging The State Key Laboratory of Management and Control for Complex Systems Institute of Automation Chinese Academy of Sciences Beijing 100190 P. R. China School of Chemical Sciences The University of Auckland Auckland 1142 New Zealand

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Fractional order PDμ control of a visual servoing manipulator system

Fractional order PDμ control of a visual servoing manipulat...

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European control Conference (ECC)

作者： Cosmin Copot Clara M. Ionescu Corneliu Lazar Robin De Keyser Department of Electrical energy Systems and Automation Ghent University Belgium Department of Automatic Control and Applied Informatics Technical University of Iasi Romania

ISBN: (纸本)9781479901890

In this paper, a fractional order PD μ controller based on visual features is presented. A manipulator robot with 6 degrees of freedom and an eye-in-hand camera configuration is employed to design a visual servoing control architecture. The image based control law was designed using point features. A Matlab simulator which implements the visual control architecture was developed and the results were compared with a classical integer order controller. The validity of the visual based controllers is shown by the simulation results which demonstrate that the proposed approach based on a fractional order controller has a stable and convergent behavior when dealing with visual servoing applications. The fractional order PD μ controller provides better performances in comparison with an integer order PD controller.

关键词： Cameras Visualization Robot kinematics Visual servoing

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