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30th European Simulation and Modelling Conference, ESM 2016

作者： Pózna, Anna I. Gerzson, Miklós Leitold, Adrien Hangos, Katalin M. Department of Electrical Engineering and Information Systems Hungary Deparment of Mathematics University of Pannonia P.O.B. 158 VeszprémH-8201 Hungary Process Control Research Group Computer and Automation Research Institute P.O.B. 63 BudapestH-1518 Hungary

ISBN: (纸本)9789077381953

An improved diagnosis method of technological systems is proposed in this paper that is based on their qualitative colored Petri-net model (Leitold et al. 2014). The proposed diagnosis method can be used when more than one fault occur in the system and if the fault evolves during the operation of the system. In order to make the diagnosis of complex process systems computationally feasible, a structural decomposition method is introduced to reduce the size of their occurrence graphs and to make the diagnosis easier. The proposed methods are illustrated on examples.

关键词： Fault detection

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Application of discrete ant colony optimization in VRPTW 11th

Application of discrete ant colony optimization in VRPTW

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

作者： Fu, Qinhong Zhou, Kang Qi, Huaqing Wu, Tingfang School of Math and Computer Wuhan Polytechnic University WuhanHubei430023 China Department of Economics and Management Wuhan Polytechnic University WuhanHubei430023 China Key Laboratory of Image Information Processing and Intelligent Control School of Automation Huazhong University of Science and Technology WuhanHubei430074 China

ISBN: (纸本)9789811036132

The classical ant colony algorithm for vehicle routing problem with time windows (VRPTW) has problems of low efficiency, slow convergence and prematurity. And the discrete ant colony optimization (DACO) is proposed for these problem. It adopts the one-dimensional discrete coding that can make the data structure simpler and bring in faster convergence speed. In addition, self-convergence mode is used to calculate the optimal vehicle number rather than setting the optimal vehicle number at the beginning, which makes the algorithm more flexible and accelerates the convergence speed effectively. The time window and vehicle load are not considered in the optimization process, when ants complete the whole process and then the path is explained, this move not only expands the ant search scope but also improves the efficiency of the algorithm. The above highlights make the most of the selfadaptation and self-regulating mechanism, which effectively reduces the probability of the local optimal solution at the same time. Experimental results for Solomon benchmark test problems indicate that DACO outperforms both in reducing time and space complexity in the premise of not affecting the accuracy. Thus proves DACO is effective and feasible in solving the VRPTW. © Springer Nature Singapore Pte Ltd. 2016.

关键词： Ant colony optimization

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New stability results for switched discrete-time systems with application to consensus problems 55

New stability results for switched discrete-time systems wit...

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55th IEEE Conference on Decision and control, CDC 2016

作者： Lee, Ti-Chung Xia, Weiguo Su, Youfeng Huang, Jie Department of Electrical Engineering Minghsin University of Science and Technology Hsin-Hsing Road Hsin-Fong Hsinchu304 Taiwan School of Control Science and Engineering Dalian University of Technology Dalian China College of Mathematics and Computer Science Fuzhou University Fuzhou China Department of Mechanical and Automation Engineering Chinese University of Hong Kong Hong Kong

ISBN: (纸本)9781509018376

This paper investigates the asymptotic stability of a class of switched linear time-invariant discrete-time systems. Without the restriction of switching signals, a novel result is first proposed to guarantee uniform global asymptotic stability. Then, it is applied to studying some consensus problems of linear multi-agent systems under switching network topology. The proposed result modifies some insufficient condition assumed in a related paper and establishes the exponentially fast convergence rate of the multi-agent system. An interesting example illustrates the effectiveness of the derived results. © 2016 IEEE.

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Cyber-physical System Security for Networked Industrial Processes

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International Journal of automation and computing 2015年第6期12卷 567-578页

作者： Shuang Huang Chun-Jie Zhou Shuang-Hua Yang Yuan-Qing Qin School of Automation Huazhong University of Science and Technology Key Laboratory of Ministry of Education for Image Processing and Intelligent Control Department of Computer Science Loughborough University

Cyber-physical systems(CPSs) are integrations of networks, computation and physical processes, where embedded computing devices continually sense, monitor, and control the physical processes through networks. Networked industrial processes combining internet, real-time computer control systems and industrial processes together are typical CPSs. With the increasingly frequent cyber-attack, security issues have gradually become key problems for CPSs. In this paper, a cyber-physical system security protection approach for networked industrial processes, i.e., industrial CPSs, is proposed. In this approach, attacks are handled layer by layer from general information technology(IT) security protection, to active protection, then to intrusion tolerance and physical security protection. The intrusion tolerance implemented in real-time control systems is the most critical layer because the real time control system directly affects the physical layer. This novel intrusion tolerance scheme with a closed loop defense framework takes into account the special requirements of industrial CPSs. To illustrate the effectiveness of the CPS security protection approach, a networked water level control system is described as a case study in the architecture analysis and design language(AADL) environment. Simulation results show that 3 types of injected attacks can be quickly defended by using the proposed protection approach.

关键词： Critical infrastructures cyber-physical systems(CP

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Discrete event-triggered sliding mode control with fast output sampling feedback

Discrete event-triggered sliding mode control with fast outp...

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International Workshop on Variable Structure Systems, VSS

作者： Abhisek K. Behera Bijnan Bandyopadhyay Johann Reger Systems and Control Engineering Indian Institute of Technology Bombay Mumbai India Computer Science and Automation Department Technische Universität Ilmenau Ilmenau Germany

This paper deals with event-triggering based design of discrete-time sliding mode (DTSM) control for linear systems. Multirate output feedback based DTSM is designed with event-triggering strategy such that the system trajectories remain bounded in the vicinity of sliding manifold. An event-triggering rule is developed for DTSM which is evaluated only at periodic time intervals. The control is updated whenever the triggering instant is generated at these discrete time instants. It is shown that with this technique the system trajectories remain bounded. Also, in this triggering scheme there is always guaranteed Zeno free execution of triggering sequences as it is inherently discrete. Simulation results are shown to demonstrate the theoretical treatments of this paper.

关键词： Trajectory Manifolds Stability analysis Convergence Sliding mode control Output feedback

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Event-triggered sliding mode control for delta operator systems

Event-triggered sliding mode control for delta operator syst...

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Annual Conference of Industrial Electronics Society

作者： Kiran Kumari Bijnan Bandyopadhyay Abhisek K. Behera Johann Reger Systems and Control Engineering Indian Institute of Technology Bombay Mumbai India Computer Science and Automation Department Technische Universität Ilmenau Ilmenau Germany

The paper presents an event-triggering based sliding mode control law for delta operator systems with disturbance. The discrete domain representation of a system using shift operator becomes numerically ill-conditioned at very high sampling rates. To circumvent this problem, the system is represented using delta operator. The delta operator creates a rapprochement between continuous-time and discrete-time system model at very high sampling rates. A discrete-time sliding mode (DTSM) control law is developed to achieve robustness against external disturbances. Further to reduce the resource utilization, an event-triggered DTSM control law is proposed such that the closed loop system is stable. Due to the inherent discrete nature of the control there is no accumulation of triggering instants at any instant of time. Hence the zeno free execution of the control updating instants is always guaranteed. Simulation results are also shown to illustrate the effectiveness of the proposed method.

关键词： Sliding mode control Trajectory Discrete-time systems Manifolds Numerical models Robustness

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A 3μW, 0.65V regulator with an embedded temperature compensated voltage reference

A 3μW, 0.65V regulator with an embedded temperature compens...

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International Conference on Synthesis, Modeling, Analysis and Simulation Methods and Applications to Circuit Design (SMACD)

作者： Fu-To Lin Jui-Hsiang Tsai Yu-Te Liao Department of Materials Science The University of Shiga Prefecture Hassaka Hikone Shiga Japan Institute of Automation and Computer Control Ruhr-Universität Bochum Germany

This paper presents a 0.65-V flipped voltage follower (FVF)-based regulator with an embedded sub-1-V voltage reference. A low-pass filter is employed in the current coupling path to reduce the bias noise and improve t... 详细信息

ISBN: (纸本)9781509004911

关键词： Regulators Voltage control Transistors Capacitors Logic gates Voltage measurement Power supplies

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Analysis of Do D inkjet printhead performance for printable electronics fabrication using dynamic lumped element modeling and swarm intelligence based optimal prediction

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Journal of Central South University 2015年第10期22卷 3925-3934页

作者：何茂伟孙丽玲胡琨元朱云龙陈瀚宁 School of Computer Science and Software Tianjin Polytechnic University Department of Information Service & Intelligent Control Shenyang Institute of AutomationChinese Academy of Sciences University of Chinese Academy of Sciences

The major challenge in printable electronics fabrication is to effectively and accurately control a drop-on-demand(Do D) inkjet printhead for high printing quality. In this work, an optimal prediction model, constructed with the lumped element modeling(LEM) and the artificial bee colony(ABC) algorithm, was proposed to efficiently predict the combination of waveform parameters for obtaining the desired droplet properties. For acquiring higher simulation accuracy, a modified dynamic lumped element model(DLEM) was proposed with time-varying equivalent circuits, which can characterize the nonlinear behaviors of piezoelectric printhead. The proposed method was then applied to investigate the influences of various waveform parameters on droplet volume and velocity of nano-silver ink, and to predict the printing quality using nano-silver ink. Experimental results show that, compared with two-dimension manual search, the proposed optimal prediction model perform efficiently and accurately in searching the appropriate combination of waveform parameters for printable electronics fabrication.

关键词： piezoelectric inkjet system lumped element modeling dynamic model nano-silver ink artificial bee colony algorithm

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Visual tracking via an ensemble of random classifiers

Visual tracking via an ensemble of random classifiers

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IEEE International Conference on Real-time Computing and Robotics (RCAR)

作者： Yichun Shi Hesheng Wang Department of Computer Science Shanghai Jiao Tong University Shanghai China Department of Automation Shanghai Jiao Tong University and Key Laboratory of System Control and Information Processing Shanghai China

ISBN: (纸本)9781467389600

One largest problem for tracking-by-detection methods is the incomplete and noisy training set. Occlusion, illumination and many other problems could lead to this problem. Models that are not adaptive enough would fail to track the target when drastic appearance change takes place. Adaptive ones, although keep tracking at first, could lose the target because of learning too many incorrect samples. In this paper, we present an ensemble model of random classifiers updated on different dataset. When the appearance of the target changes drastically and some sub-models are confused, the others could help correct the tracking result. A latent variable is added for choosing sub-models and it naturally leads to predicting the new samples with a weighted sum of sub-models. To calculate the weight, we add a generative model to each random classifier. Experiments show that our method could track the target robustly and accurately.

关键词： Target tracking Training Visualization Noise measurement Robustness Lighting Adaptation models

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Social role clustering with topic model

Social role clustering with topic model

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IEEE International Conference on Intelligence and Security Informatics, ISI

作者： Jie Bai Linjing Li Daniel Zeng Junjie Lin The State Key Laboratory of Management and Control for Complex Systems Institute of Automation China School of Computer and Control Engineering University of Chinese Academy of Sciences China Department of Management of Information Systems The University of Arizona USA

ISBN: (纸本)9781509038664

In this paper, we propose a new role analyzing paradigm for social networks enlightened by topic modeling, which can be adopted as a primitive building block in various security related tasks, such as hidden community finding, important person recognizing and so on. We first present the social network under analyzing as a heterogeneous network constructed by both the users and the subjects discussed among them. We then view this network in a Bag-of-Users schema, which mimics its classical Bag-of-Words counterpart. In this schema, the subjects discussed are treated as “documents” while the users are treated as “words” which construct the “documents”. Based on this novel presentation, we finally apply topic modeling technology to perform the social role clustering. Experiments on a practical security-related social network dataset prove the effectiveness of our approach.

关键词： Social network services Heterogeneous networks Analytical models Computational modeling Finance Security Data models

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