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Energy shaping of boundary controlled linear port Hamiltonian systems

IFAC Proceedings Volumes 2014年第3期47卷 1580-1585页

作者： Yann Le Gorrec Alessandro Macchelli Hector Ramirez Hans Zwart Department of Automation and Micro-Mechatronic Systems FEMTO-ST UMR CNRS 6174 ENSMM 26 chemin de l'épitaphe F-25030 Besançon France Department of Electrical Electronic and Information Engineering “Guglielmo Marconi” (DEI) University of Bologna viale del Risorgimento 2 40136 Bologna Italy University of Twente Faculty of Electrical Engineering Mathematics and Computer Science Department of Applied Mathematics P.O. Box 217 7500 AE Enschede The Netherlands

In this paper, we consider the asymptotic stabilization of a class of one dimensional boundary controlled port Hamiltonian systems by an immersion/reduction approach and the use of Casimir invariants. We first extend existing results on asymptotic stability of linear infinite dimensional systems controlled at their boundary to the case of stable Port Hamiltonian controllers including some physical constraints as clamping. Then the relation between structural invariants, namely Casimir functions, and the controller structure is computed. The Casimirs are employed in the selection of the controllers Hamiltonian to shape the total energy function of the closed loop system and introduce a minimum in the desired equilibrium configuration. The approach is illustrated on the model of a micro manipulation process with partial-actuation on one side of the spatial domain.

关键词： Infinite dimensional port Hamiltonian systems asymptotic stability immersion reduction control design

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Performance Comparison of Source Routing Tactics for WSN of Grid Topology

Performance Comparison of Source Routing Tactics for WSN of ...

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IEEE International Symposium on Dependable, Autonomic and Secure Computing (DASC)

作者： Wenxiang Li Yunhe Wu Chunsheng Zhu Yajie Ma Key Laboratory of Metallurgical Industry Process Systems in Hubei Province Wuhan University of Science and Technology Wuhan China Wuhan University of Science and Technology School of Information Science and Engineering Wuhan China Department of Electrical and Computer Engineering University of British Columbia Vancouver Canada Engineering Research Center for Metallurgical Automation and Detecting Technology of Ministry of Education Wuhan University of Science and Technology Wuhan China

The nodes near sink in wireless sensor networks are featured with heavy transmission loads, so these performance bottleneck nodes are prone to running out of energy early with shortened network lifetime. Routing tactic plays important role on transmission performance and energy consumption of network. In this paper, we enumerate typical source routing tactics in Grid topology, include 1) Random Equal Probability Forwarding, 2) Line Forwarding, 3) Source-Zigzag Forwarding, 4) Destination-Zigzag Forwarding, and 5) Balance Forwarding. We analysis the traffic load distribution among nodes for these routing tactics, and calculate the load of performance bottleneck nodes and transmission delay in one data collection cycle. Based on the energy consumption model, we further make comparison on the energy consumptions of transmission and standing-by for these tactics. Numerical results show that Balance Forwarding tactic leads to the least overall energy consumption on performance bottleneck nodes, and Line Forwarding and Random Equal-Probability Forwarding lead to high energy consumption.

关键词： Routing Energy consumption Topology Delays Telecommunication traffic Network topology Educational institutions

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Neural control of unknown non-affine systems by state and output feedback

Neural control of unknown non-affine systems by state and ou...

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3rd IFAC Conference on Intelligent Control and automation Science, ICONS 2013

作者： He, Wei Deng, Dan Tang, Zhong-Liang Robotics Institute School of Automation Engineering University of Electronic Science and Technology of China Chengdu 611731 China Institute of Intelligent Systems and Information Technology School of Computer Science and Engineering University of Electronic Science and Technology of China Chengdu 611731 China

ISBN: (纸本)9783902823458

In this paper, we consider the unknown non-affine nonlinear systems with the input deadzone and external disturbance. To solve the deadzone effects, a Radial Basis Function Neural Network (RBFNN) is introduced to approximate the deadzone effects and improve the robustness of the system. Moreover, we estimate the disturbance in another RBFNN. Based on the Lyapunov stability analysis and the support of high-gain observer, the adaptive neural network control is developed via both full-state feedback and output feedback. Simulation studies are proposed to illustrate the control performance. The semiglobally uniform boundedness is guaranteed in the closed-loop systems under the proposed control. Copyright © 2013 IFAC.

关键词： Dead zones

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3D R Transform on Spatio-Temporal Interest Points for Action Recognition

3D R Transform on Spatio-Temporal Interest Points for Action...

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IEEE Conference on computer Vision and Pattern Recognition

作者： Chunfeng Yuan Xi Li Weiming Hu Haibin Ling Stephen Maybank National Laboratory of Pattern Recognition Institute of Automation School of Computer Science University of Adelaide Department of Computer and Information Sciences Temple University School of Computer Science and Information Systems Birkbeck College

ISBN: (纸本)9781467364102

Spatio-temporal interest points serve as an elementary building block in many modern action recognition algorithms, and most of them exploit the local spatio-temporal volume features using a Bag of Visual Words (BOVW) representation. Such representation, however, ignores potentially valuable information about the global spatio-temporal distribution of interest points. In this paper, we propose a new global feature to capture the detailed geometrical distribution of interest points. It is calculated by using the R transform which is defined as an extended 3D discrete Radon transform, followed by applying a two-directional two-dimensional principal component analysis. Such R feature captures the geometrical information of the interest points and keeps invariant to geometry transformation and robust to noise. In addition, we propose a new fusion strategy to combine the R feature with the BOVW representation for further improving recognition accuracy. We utilize a context-aware fusion method to capture both the pairwise similarities and higher-order contextual interactions of the videos. Experimental results on several publicly available datasets demonstrate the effectiveness of the proposed approach for action recognition.

关键词： BOVW points keeps ROENTGEN Recognition (Psychology) fusion method Transform Bag device

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Implementation of Constraints Satisfaction Problems Methods for Solving the Periodic Maintenance Processes Scheduling

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IFAC Proceedings Volumes 2013年第9期46卷 341-346页

作者： A. Fedotova V. Taratoukhine M. Ovsyannikov J. Becker Department of computer automation The Bauman Moscow State Technical University and European Research Centre in Information Systems (ERCIS) Lab Russia at Higher School of Economics Russia (Tel: +7(926)5965359) University of Muenster European Research Centre for Information Systems (ERCIS) HQ and ERCIS Lab Russia at Higher School of Economics Germany Department of computer automation The Bauman Moscow State Technical Russia University of Muenster European Research Centre for Information Systems (ERCIS) Germany

This paper reviews existing methods and techniques addressing the problem of maintenance support throughout the life cycle for high value manufacturing products. As part of this doctorate research the analysis of current methods of maintenance planning was conducted. In order to contribute to a more comprehensive solution, an advanced approach (algorithm) of periodic maintenance is presented. The authors believe that this approach will reduce the cost of maintenance of high value manufacturing products. The algorithm based on constraint programming methods is briefly presented and the future research directions are discussed.

关键词： information systems maintenance and repair of equipment maintenance cost periodic maintenance scheduling methods methods of constraints satisfaction problems domain ontology

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Control Lyapunov function based feedback design for quasi-polynomial systems

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IFAC Proceedings Volumes 2013年第23期46卷 128-133页

作者： Attila Magyar Katalin M. Hangos Department of Electrical Engineering and Information Systems University of Pannonia Veszprém Hungary Process Control Research Group Computer and Automation Research Institute HAS Budapest Hungary

The aim of this work is to present an entropy-like Lyapunov function based dynamic feedback design technique for quasi-polynomial and Lotka-Volterra systems. It is shown, that the dynamic feedback design problem is equivalent to the feasibility of a bilinear matrix inequality. The problem is also formulated as a control Lyapunov function based feedback design when the Lyapunov function parameters are given, the solution of this problem can be obtained by solving a linear matrix inequality. The developed method is illustrated on a simple numerical example.

关键词： Lyapunov stability nonlinear systems stabilizing feedback dynamic feedback optimization problems

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Nonlinear analysis of dynamical complex networks 2014

Abstract and Applied Analysis

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Abstract and Applied Analysis 2014年第SI42期2014卷 1-4页

作者： Wang, Zidong Shen, Bo Dong, Hongli Hu, Jun He, Xiao Ding, Derui Department of Computer Science Brunel University Uxbridge Middlesex UB8 3PH United Kingdom Communication Systems and Networks (CSN) Research Group Faculty of Engineering King Abdulaziz University Jeddah 21589 Saudi Arabia School of Information Science and Technology Donghua University Shanghai 200051 China College of Electrical and Information Engineering Northeast Petroleum University Daqing 163318 China Research Institute of Intelligent Control and Systems Harbin Institute of Technology Harbin 150001 China Department of Applied Mathematics Harbin University of Science and Technology Harbin 150080 China Department of Automation Tsinghua University Beijing 100084 China Department of Applied Mathematics Anhui Polytechnic University Wuhu 241000 China

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Developing an optimized application hosting framework in Clouds

Developing an optimized application hosting framework in Clo...

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作者： Shi, Xuanhua Jiang, Hongbo He, Ligang Jin, Hai Wang, Chonggang Yu, Bo Chen, Xueguang Service Computing Technology and Systems Lab School of Computer Huazhong University of Science and Technology China Department of Electronics and Information Engineering Huazhong University of Science and Technology China Department of Computer Science University of Warwick United Kingdom InterDigital Communications Corp. United States Department of Automation Control and Engineering Huazhong University of Science and Technology China

A Cloud system, which is also often called a data center, may host a large number of application servers (termed as applications for short in this paper) that consume various types of resource, such as CPU, memory, and I/O. In such a scenario, the application placement strategy, which specifies how to host applications across the physical servers in the Cloud, is critical to achieve good system- and/or client-oriented performance. The existing application placement algorithms in literature assume that the consumption of system resources is proportional to the level of workloads submitted to the system. In this paper, we reveal that it may not be the case in some circumstances. Based on this observation, we design and implement an application placement framework, called EAPAC, for Clouds. The developed framework is able to achieve the optimized performance by judiciously allocating to the applications a proper mixture of different types of application request as well as an appropriate number of requests in each type. Further, we investigate the issue of resource conflicts among different applications when there exist concurrent requests in the system. We have conducted extensive experiments to evaluate the performance of the developed framework. The experiment results show that compared with the existing method in literature, EAPAC can improve the performance by 35% in terms of the reply rate. © 2013 Elsevier Inc.

关键词： Application placement Cloud Resource conflicts

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Neural Control of Unknown Non-Affine systems by State and Output Feedback

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IFAC Proceedings Volumes 2013年第20期46卷 224-229页

作者： Wei He Dan Deng Zhong-Liang Tang Robotics institute and School of Automation Engineering University of Electronic Science and Technology of China Chengdu 611731 China Institute of Intelligent Systems and Information Technology and School of Computer Science and Engineering University of Electronic Science and Technology of China Chengdu 611731 China

关键词： Non-affine nonlinear system Input Deadzone Radial Basis Function Neural Network (RBFNN) Lyapunov direct method

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Performance analysis of MILP based model predictive control algorithms for dynamic railway scheduling

Performance analysis of MILP based model predictive control ...

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European Control Conference (ECC)

作者： János Rudan Bart Kersbergen Ton van den Boom Katalin Hangos Faculty of Information Technology Pázmány Péter Catholic University Delft Center for Systems and Control Delft University of Technology Computer and Automation Research Institute Hungarian Academy of Sciences

ISBN: (纸本)9781479901890

In this paper we analyse the performance of solvers for Mixed Integer Linear Programming (MILP) problems that appear from the model predictive control of railway networks. Our aim is to study techniques that reduce the amount of delay using dynamic traffic management by the rescheduling of trains. Due to the size of the emerging MILP problem and the given constraints on solution time, a thorough analysis of different MILP solution techniques was necessary. It has been proven that a significant speedup in the solution time can be achieved by the proper restructuring of the matrices of the MILP problem. The simulation results also confirm the effectiveness of the proposed control technique and the ability of this setup to analyse the most delay-sensitive trains in the network.

关键词： Delays Rail transportation Schedules Time factors Vectors Simulation Predictive control

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