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2015 American control Conference, ACC 2015

作者： Jilg, Martin Tonne, Jens Stursberg, Olaf Institute of Control and System Theory Department of Electrical Engineering and Computer Science University of Kassel Germany

ISBN: (纸本)9781479986842

This paper proposes an approach for the design of distributed state-feedback controllers for interconnected discrete-time LTI systems with uncertain communication links. These links may be subject to intermittent or persistent failure. In particular, we assume that the availability of the communication links over time can be modeled by a Markov chain. For the control design, it is shown in a first step that the combination of the LTI system dynamics and the stochastic model of the time-varying communication topology is a special case of Jump Markov Linear Systems (JMLS). Next, constraints on the information structure are introduced, restricting the subsystems' local knowledge about the global network state. This assumes that each subsystem can only detect the availability of incoming communication links. Finally, the synthesis of a stabilizing distributed feedback control law respecting the given information structure and a guaranteed bound on the expected H∞-performance is formulated and solved as a semidefinite program. © 2015 American automatic control Council.

关键词： Stochastic systems

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IQC arguments for analysis of the 3-state Moore-Greitzer compressor system

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IFAC-PapersOnLine 2015年第11 11期48卷 252-257页

作者： Shiriaev, A.S. Freidovich, L.B. Robertsson, A. Andersson, A. Johansson, R. Department of Engineering Cybernetics Norwegian University of Science and Technology TrondheimNO-7491 Norway Department of Applied Physics and Electronics UmeåUniversity UmeåSE-901 87 Sweden Department of Automatic Control Lund University LundSE-221 00 Sweden

The Integral Quadratic Constraint (IQC) framework developed by Professor Yakubovich and his co-workers, see Yakubovich ***. (2004), is one of few available constructive tools for establishing robust stability of nonlinear systems. An explicit format of stability conditions, procedures for computing a Lyapunov function and developed libraries of IQCs for common nonlinearities in dynamics, all together have made the approach unique and at the same time so to say automatic for recovering stability conditions for many applications: in the process of analyzing a dynamical system, an engineer is just required to search for a suficiently rich set of IQCs describing nonlinearities in the dynamics so that such nonlinearities can be substituted in analysis by quadratic constraints, which they satisfy. The power of the methodology becomes also its weak part in an analysis of concrete systems. Searching IQCs is the dificult task in new examples, where a lack of a rich set of IQCs for concrete nonlinearities makes the method inconclusive or too rough to detect (in)-stability. The paper is aimed at a discussion of such an example of a nonlinear dynamical system (the classical 3-state Moore-Greitzer compressor model) augmented with the dynamical feedback controller, whose parameters should be adjusted to meet a stability condition. The closed-loop system has several nonlinearities and searching the corresponding IQCs to meet the stability conditions for this example is rather involved. To overcome the problem, we have previously described by different methods a set of parameters for which any solution of the closed loop system, if bounded, will converge to the origin and that the origin is locally asymptotically stable. However, the proof is incomplete without showing a boundedness of all solutions. To solve the task we have re-used some of the IQC framework ideas, where the method has been utilized and the corresponding IQCs have been found only for unbounded trajectories, if t

关键词： System stability Closed loop systems Compressors Concretes controllers Dynamical systems Feedback control Lyapunov functions Nonlinear analysis Nonlinear control systems Nonlinear dynamical systems Asymptotically stable Compressor modeling Compressor systems Dynamic feedback controllers Feedback controller Integral quadratic constraints Quadratic constraint Stability condition

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Design of distributed observers with arbitrarily large communication delays

Design of distributed observers with arbitrarily large commu...

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Annual Conference of Industrial Electronics Society

作者： Kexin Liu Jinhu Lü Zongli Lin Academy of Mathematics and Systems Science Key Laboratory of Systems and Control Beijing China Charles L. Brown Department of Electrical and Computer Engineering University of Virginia Charlottesville VA USA

The design of networked observers has recently received much consideration. This paper is concerned with the design of distributed observers with arbitrarily large communication time delays. A traditional centralized observer assumes access to the full output the plant. In the real world situations, the output is often measured by distributed senors connected through a communication network. We propose the design of a set of distributed observers with time delays in the communication channels. Each observer is regarded as an agent, which obtains local information of the plant and communicates with other observers through an undirected communication network, with arbitrarily large time delays. Conditions are established under which the states of all observers converge exponentially to the plant state. Numerical results are proposed to illustrate our results.

关键词： Observers Delay effects Delays Communication networks Eigenvalues and eigenfunctions Communication channels Network topology

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Stochastic optimal control navigation with the avoidance of unsafe configurations

Stochastic optimal control navigation with the avoidance of ...

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International Conference on Unmanned Aircraft Systems (ICUAS)

作者： Alexey A. Munishkin Dejan Milutinović David W. Casbeer UC Santa Cruz CA Computer Engineering Department UC Santa Cruz CA Control Science Center of Excellence Air Force Research Laboratory Wright-Patterson AFB OH

ISBN: (纸本)9781467393355

Long-time planning horizons are required to safely navigate one vehicle in the presence of another, possibly non-cooperative vehicle. They give rise to computational issues preventing the real-time implementation of safe navigation algorithms. In this paper, we consider two nonholonomic vehicles, of which one (blue) has the goal to enter the “tail” of the other (red). Neither the goal nor the navigation strategy of the red vehicle is known by the blue vehicle. To anticipate this uncertainty, the blue vehicle uses infinite horizon stochastic optimal control. Using the stochastic optimal control and backward Kolmogorov equation, the blue is navigated to avoid unsafe configurations from which the red can enter the “tail” of the blue and gain advantage over it. Our results are illustrated by numerical simulations and the feasibility of the control for the real-time implementation is tested with small-scale robot experiments.

关键词： Vehicles Optimal control Stochastic processes Aircraft navigation Real-time systems Uncertainty

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A security testing platform for Wireless Sensor Networks

A security testing platform for Wireless Sensor Networks

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International Conference on Information Networking

作者： Min Wei Shuaidong Zhang Keecheon Kim Key Laboratory of Industrial loT and Networked Control Ministry of Education Chongqing University of Posts and Telecommunications Chongqing China Department of Computer Science and Engineering Konkuk University Seoul Republic of Korea

Wireless Sensor Networks (WSNs) are already employed in numerous applications including military, industry, and health. Considering the inherent limitations in WSNs, the security is a critical issue in WSNs. The declared security functions of each device should be well verified. In this paper, a security testing method based on security level is proposed for WSNs. Meanwhile, an experimental security testing platform is implemented. The test results show that the platform is a feasible platform for assessing device security levels in WSNs.

关键词： Testing Wireless sensor networks Protocols Servers Object recognition Authentication

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Matrix flat splicing systems 11th

Matrix flat splicing systems

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11th International Conference on Bio-inspired Computing – Theories and Applications, BIC-TA 2016

作者： Ceterchi, Rodica Pan, Linqiang Song, Bosheng Subramanian, K.G. Faculty of Mathematics and Computer Science University of Bucharest 14 Academiei Street Bucharest010014 Romania School of Electric and Information Engineering Zhengzhou University of Light Industry ZhengzhouHenan450002 China Key Laboratory of Image Information Processing and Intelligent Control of Education Ministry of China School of Automation Huazhong University of Science and Technology WuhanHubei430074 China Department of Mathematics Madras Christian College Chennai600059 India

ISBN: (纸本)9789811036101

In dealing with the problem of modelling DNA recombination, the operation of splicing on linear and circular strings of symbols was introduced. Inspired by splicing on circular strings, the operation of flat splicing on a pair of strings (u, v) was considered. This operation involves "cutting" u at a specified position and "inserting" v into it, with v having a pre-specified prefix as well as suffix defined by a flat splicing rule. In this work, we consider a well-known technique in formal language theory, known as "matrix of rules", and introduce matrix of flat splicing rules and thus define matrix flat splicing system (MFSS). Some results on the language generative power of MFSS are provided. An application of MFSS in the generation of chain code pictures is also pointed out. © Springer Nature Singapore Pte Ltd. 2016.

关键词： Formal languages

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Variable selection in identification of a high dimensional nonlinear non-parametric system

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control Theory and Technology 2015年第1期13卷 1-16页

作者： Er-Wei BAI Wenxiao ZHAO Weixing ZHENG Department of Electrical and Computer Engineering University of Iowa School of Electronics Electrical Engineering and Computer Science Queen's UniversityBelfast U.K. Key Laboratory of Systems and Control Academy of Mathematics and Systems Science National Center for Mathematics and Interdisciplinary Sciences Chinese Academy of Sciences School of Computing Engineering and Mathematics University of Western Sydney

The problem of variable selection in system identification of a high dimensional nonlinear non-parametric system is described. The inherent difficulty, the curse of dimensionality, is introduced. Then its connections to various topics and research areas are briefly discussed, including order determination, pattern recognition, data mining, machine learning, statistical regression and manifold embedding. Finally, some results of variable selection in system identification in the recent literature are presented.

关键词： System identification variable selection nonlinear non-parametric system curse of dimensionality

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-degree coverage algorithm based on optimization nodes deployment in wireless sensor networks

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International Journal of Distributed Sensor Networks 2017年第2期13卷

作者： Zeyu Sun Chuanfeng Li Xiaofei Xing Huihui Wang Ben Yan Xuelun Li Department of Computer and Information Engineering Luoyang Institute of Science and Technology Luoyang China School of Electronic and Information Engineering Xi’an Jiaotong University Xi’an China Power and Intelligent Control Research Cluster Queen’s University Belfast Belfast UK School of Computer Science & Educational Software Guangzhou University Guangzhou China Department of Engineering Jacksonville University Jacksonville FL USA School of Electronic Information Engineering Tianjin University Tianjin China

In the process of the wireless sensor network research, the issue on the energy consumption and coverage is an essential and critical one. According to the characteristic of the sensor nodes, it is homogeneous, and we proposed the k-degree coverage algorithm based on optimization nodes deployment. First, the algorithm gives the solving procedure of the maximum seamless coverage ratio, when the three-node joint coverage has been provided. Second, when the sensor nodes are covering the monitoring area, the algorithm gives the solving procedure of the expected coverage quality and the judgment methods of the coverage ratio, when the nodes are compared with the nearby ones. And when there is redundancy coverage in the given monitoring area, we have given the solving procedure of any sensor nodes that exist in the redundant nodes coverage. Finally, using the simulation experiment, the results of the coverage algorithm based on optimization nodes deployment are compared with other algorithms in terms of the coverage quality and the network lifetime, the performance indexes have enhanced to 13.36% and 12.92% on average. Thus, the effectiveness and viability of the coverage algorithm based on optimization nodes deployment have been proved.

关键词： Wireless sensor networks sensor nodes networks lifetime coverage ratio optimization deployment

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Preface

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CEUR Workshop Proceedings 2017年 1935卷

作者： Bastianelli, Emanuele D'Aquin, Mathieu Nardi, Daniele Knowledge Media Institute Open University United Kingdom Insight Centre for Data Analytics National University of Ireland Galway Ireland Department of Computer Science Control and Management Engineering Sapienza University of Rome Italy

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Behavior analysis of a bio-inspired model to care for casualties in a disaster

Behavior analysis of a bio-inspired model to care for casual...

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

作者： Cristian Nicolae Buţincu Mitică Craus Department of Computer Science and Engineering Faculty of Automatic Control and Computer Engineering “Gheorghe Asachi” Technical University of Iasi

This paper presents a thorough analysis of the behavior of a bio-inspired model to care for casualties in a disaster. The model was proposed by the authors in a previous paper and a simulation based on it was performed and evaluated. Here, we analyze the evolution of the system and the impact that various model parameters can have over it. Once the behavior is well understood, we can then focus our research on certain groups of parameter adjustments so that with a minimum implementation cost to achieve a maximum benefit in terms of saved lives.

关键词： Absorption Computational modeling Biological system modeling Analytical models Routing Gaussian distribution Adaptation models

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