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International Conference on Advanced Communication Technology (ICACT)

作者： Byoung-Koo Kim Dong-Ho Kang Jung-Chan Na Tai-Myoung Chung Control System Security Research Section Electronics and Telecommunications Research Institute (ETRI) Korea Department of Electrical and Computer Engineering Sungkyunkwan University Korea

The development of IT (Information Technology) has made access to control systems easier. However, because such advancement of control systems gave rise to many security vulnerabilities, the threat of cyber-attack is increasing as well. In order to respond these threats, we discusses the mechanism for protecting ICS (Industrial control system) network. Most of all, since availability is the most critical factor in a control system, independent network security technology is required. In this viewpoint, this paper presents our industrial firewall system, named the IndusCAP-Gate (Industrial Cyber Attack Prevention-Gate) system, that fundamentally prevents unauthorized access to a control system. Our system applies access control filters of various levels. Most of all, the proposed system has an abnormal traffic filtering mechanism about Modbus and DNP3 protocol of the most widely used protocols in ICS network. Therefore, it facilitates the provision of security policy specific to each zone of the control system intranet.

关键词： control systems Access control Protocols Firewalls (computing) Filtering Process control

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A Survey on Simultaneous Wireless Information and Power Transfer

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Journal of Physics: Conference Series 2017年第1期803卷

作者： T D P Perera D N K Jayakody S De M A Ivanov Department of Control System Optimization Institute of Cybernetics National Research Tomsk Polytechnic University Tomsk 634050 Russia. Department of Electrical Engineering Indian Institute of Technology Delhi

This paper presents a comprehensive study related to simultaneous wireless information and power transfer (SWIPT) in different types of wireless communication setups. Harvesting energy using SWIPT is an appealing solution in the context of extending battery life of wireless devices for a fully sustainable communication system. Strong signal power increases power transfer, but also causes more interference in information transfer, causing realization of the SWIPT challenging problem. This article provides an overview of technical evolution of SWIPT. A survey and qualitative comparison of the existing SWIPT schemes is provided to demonstrate their limitations in the current and 5G networks. Open challenges are emphasized and guidelines are provided to adapt the existing schemes in order to overcome these limitations and make them fit for integrating with the modern and emerging next generation communication networks, such as 5G systems.

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Observability-driven Sensor Deployment in Smart Academic Environments: Demo Abstract 16

Observability-driven Sensor Deployment in Smart Academic Env...

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Proceedings of the 14th ACM Conference on Embedded Network Sensor systems CD-ROM

作者： A. Agarwal K. Jaiswal U. Gudhaka V. Munigala Krithi Ramamritham Gopinath Karmakar Department of Computer Science & Engineering Indian Institute of Technology Bombay Reactor Control System Design Section Bhabha Atomic Research Centre

ISBN: (纸本)9781450342636

Saving energy without causing discomfort and without demanding human intervention is the need of the day. It is important to develop sensor systems which not only satisfy user requirements, but also take energy consumption into consideration. In this demo, we present the sensing subsystems of a Smart Academic Environment, based upon the core concept of 'Observability' [1] which -- while satisfying user needs -- helps to reduce the number of sensors required.

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Enhancing BEM simulations of a stalled wind turbine using a 3D correction model

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Journal of Physics: Conference Series 2018年第1期974卷

作者： Galih Bangga Go Hutomo Taurista Syawitri Tri Kusumadewi Winda Oktavia Ahmad Sabila Herlambang Setiadi Muhamad Faisal Yongki Hendranata Dwi Lastomo Louis Putra Stefanus Kristiadi Ilmi Bumi Institute of Aerodynamics and Gas Dynamics University of Stuttgart Stuttgart Germany Mechanical Engineering Department Institut Teknologi Sepuluh Nopember Surabaya Indonesia Toyota SO Department Astra International Ltd. Indonesia Mechanical Engineering Department Universitas Muhammadiyah Surakarta Surakarta Indonesia School of Manufacturing System and Mechanical Engineering Sirindhorn International Institute of Technology Thammasat University Thailand Project Support and Cost Control Division Indoturbine Ltd. Jakarta Indonesia Civil Engineering Department Universitas Brawijaya Malang Indonesia School of Information Technology & Electrical Engineering The University of Queensland Brisbane Australia Non-Installation Top Range Department Berca Schindler Lifts Ltd. Indonesia Graduate Institute of Automation and Control National Taiwan University of Science and Technology Taiwan Mechanical Engineering Department Texas A&M University College Station United States PUI-PT Mechatronics and Industrial Automation Research Center Intitut Teknologi Sepuluh Nopember Surabaya Indonesia Mechanical Engineering Department Politecnico di Milano Milan Italy Aeronautics Department Imperial College of Science Technology and Medicine London United Kingdom Materials Engineering Department Institut Teknologi Sepuluh Nopember Surabaya Indonesia

Nowadays wind turbine rotors are usually employed with pitch control mechanisms to avoid deep stall conditions. Despite that, wind turbines often operate under pitch fault situation causing massive flow separation to occur. Pure Blade Element Momentum (BEM) approaches are not designed for this situation and inaccurate load predictions are already expected. In the present studies, BEM predictions are improved through the inclusion of a stall delay model for a wind turbine rotor operating under pitch fault situation of -2.3° towards stall. The accuracy of the stall delay model is assessed by comparing the results with available Computational Fluid Dynamics (CFD) simulations data.

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An Event-Triggered Approach to State Estimation for Neural Networks with Individual Triggering Thresholds

An Event-Triggered Approach to State Estimation for Neural N...

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第35届中国控制会议

作者： Licheng Wang Zidong Wang Lei Zou Guoliang Wei Shanghai Key Lab of Modern Optical System Department of Control Science and EngineeringUniversity of Shanghai for Science and Technology Department of Computer Science Brunel University LondonUxbridge Research Institute of Intelligent Control and Systems Harbin Institute of Technology

ISBN: (纸本)9781509009107

In this paper, the state estimation problem is investigated for a class of discrete-time stochastic neural networks with event-triggered transmission(ETT) mechanism. Different from the traditional periodic communication mechanism, the ETT mechanism employed in this paper possesses the advantage of mitigating the network traf c resulting from the unnecessary sending and receiving data between the sensors and the estimators. Moreover, the proposed ETT mechanism is implemented individually for each neuron. That is, the measurement output of each neuron is transmitted to the estimator only when its corresponding triggering condition with the speci ed triggering threshold is satis ed, thereby re ecting the engineering practice in a more realistic way. The aim of the addressed problem is to design an estimator for the neural networks subject to the ETT mechanism such that the estimation error is asymptotically bounded in the mean square. Furthermore, the estimator gain matrix is explicitly parameterized in the sense of minimizing such an asymptotic error upper bound. Finally, a numerical example is presented to demonstrate the effectiveness of the results.

关键词： Event-triggered scheme Neural networks Individual triggering threshold State estimation Asymptotic boundedness

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Repeated Strike Process During Disconnector Operation in Ultra-High Voltage Gas-Insulated Switchgear

Repeated Strike Process During Disconnector Operation in Ult...

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作者： Guan, Yonggang Cai, Yuanji Chen, Weijiang Liu, Weidong Li, Zhibing Yue, Gongchang Zhang, Junmin State Key Lab of Control and Simulation of Power System and Generation Equipments Department of Electrical Engineering Tsinghua University Beijing100084 China State Grid Corporation of China Beijing100031 China China Electric Power Research Institute Beijing100192 China School of Automation Science and Electrical Engineering Beihang University Beijing100191 China

Very fast transient over-voltage (VFTO), induced by disconnector operations in gas-insulated switchgears, has become the limiting dielectric stress at ultra-high voltage levels. Much work has been done to investigate single-strike waveforms of VFTO. However, little study has been carried out investigating the repeated strike process, which would influence VFTO significantly. In this paper, we carried out 450 effective experiments in an ultra-high voltage test circuit, and conducted calculations through the Monte Carlo simulation method, to investigate the repeated strike process. Firstly, the mechanism of the repeated strike process is proposed, based on the experimental results. Afterwards, statistical breakdown characteristics of disconnectors are obtained and analyzed. Finally, simulations of the repeated strike process are conducted, which indicate that the dielectric strength recovery speed and polarity effect factor have a joint effect on VFTO. This study enhances the understanding of the nature of VFTO, and may help to optimize the disconnector designed to minimize VFTO.

关键词： Monte Carlo methods

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Asteroid ryugu before the Hayabusa2 encounter

arXiv

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arXiv 2018年

作者： Wada, Koji Grott, Matthias Michel, Patrick Walsh, Kevin J. Barucci, Antonella M. Biele, Jens Blum, Jürgen Ernst, Carolyn M. Grundmann, Jan T. Gundlach, Bastian Hagermann, Axel Hamm, Maximilian Jutzi, Martin Kim, Myung-Jin Kührt, Ekkehard Le Corre, Lucille Libourel, Guy Lichtenheldt, Roy Maturilli, Alessandro Messenger, Scott R. Michikami, Tatsuhiro Miyamoto, Hideaki Mottola, Stefano Nakamura, Akiko M. Müller, Thomas Nittler, Larry R. Ogawa, Kazunori Okada, Tatsuaki Palomba, Ernesto Sakatani, Naoya Schröder, Stefan Takir, Driss Zolensky, Michael E. Tsudanuma 2-17-1 Narashino Chiba275-0016 Japan DLR Institute for Planetary Research Rutherfordstr. 2 Berlin12489 Germany Université Côte d'Azur Observatoire de la Côte d'Azur CNRS Lagrange Laboratory Southwest Research Institute Boulder United States Observatoire de Paris PSL Research University CNRS Université Paris Diderot Sorbonne Paris Cité UPMC Université Paris 06 Sorbonne Universités 5 Place J. Janssen Meudon Principal Cedex92195 France DLR RB-MSC German Aerospace Center Cologne51147 Germany Institut für Geophysik und extraterrestrische Physik Technische Universität Braunschweig Mendelssohnstr. 3 BraunschweigD-38106 Germany Johns Hopkins University Applied Physics Laboratory LaurelMD United States DLR German Aerospace Center Institute of Space Systems System Engineering and Project Office Robert-Hooke-Strasse 7 BremenD-28359 Germany Department of Biological and Environmental Sciences University of Stirling FK9 4LA United Kingdom Physics Institute University of Bern Switzerland Center for Space Situational Awareness Korea Astronomy and Space Science Institute 776 Daedeokdae-ro Yuseong-gu Daejeon305-348 Korea Republic of Planetary Science Institute 1700 East Fort Lowell Suite 106 TucsonAZ85719 United States DLR Institute of System Dynamics and Control Oberpfaffenhoffen Germany Robert M Walker for Space Sciences Astromaterials Research and Exploration Science NASA Johnson Space Center HoustonTX77058 United States Faculty of Engineering Kindai University Hiroshima Campus 1 Takaya Umenobe Higashi-Hiroshima Hiroshima739-2116 Japan Deptartment of Systems Innovation University of Tokyo Tokyo Japan Department of Planetology Graduate School of Science Kobe University 1-1 Rokkodai Nada-ku Kobe657-8501 Japan Max-Planck Institute for Extraterrestrial Physics Garching Germany Department of Terrestrial Magnetism Carnegie Institution of Washington 5241 Broad Branch Rd NW 20015 United States Institute of Space and Astronautical Sc

Asteroid (162173) Ryugu is the target object of Hayabusa2, an asteroid exploration and sample return mission led by Japan Aerospace Exploration Agency (JAXA). Ground-based observations indicate that Ryugu is a C-type near-Earth asteroid with a diameter of less than 1 km, but the knowledge of its detailed properties is still very limited. This paper summarizes our best understanding of the physical and dynamical properties of Ryugu based on remote sensing and theoretical modeling. This information is used to construct a design reference model of the asteroid that is used for formulation of mission operations plans in advance of asteroid arrival. Particular attention is given to the surface properties of Ryugu that are relevant to sample acquisition. This reference model helps readers to appropriately interpret the data that will be directly obtained by Hayabusa2 and promotes scientific studies not only for Ryugu itself and other small bodies but also for the Solar system evolution that small bodies shed light on. Copyright © 2018, The Authors. All rights reserved.

关键词： Asteroids

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Low carbon transmission expansion planning considering demand side management

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Dianli Xitong Zidonghua/Automation of Electric Power systems 2016年第23期40卷 61-69页

作者： Cheng, Yaohua Zhang, Ning Kang, Chongqing Meng, Junxia Yan, Huaguang Department of Electrical Engineering Tsinghua University Beijing100084 China State Key Laboratory of Control and Simulation of Power System and Generation Equipments Tsinghua University Beijing100084 China China Electric Power Research Institute Beijing100085 China

The implementation of transmission expansion planning towards low carbon development can effectively alleviate the "carbon lock" effect in the power industry and facilitate the transition to low carbon power system. The demand side management (DSM) is able to reduce the needs of power supply and transmission capacity and further bring down the generation coal consumption and transmission losses. It is therefore an important means of carbon emission reduction in power system. The paper analyzes the impact of DSM and low carbon development on transmission planning at first. By analyzing the performance of typical DSM measures in the constraints, a low carbon transmission expansion planning model is established considering DSM. Nonlinear constraints in the planning model are transformed into linear ones using inequality separation method, turning the planning model into a mixed integer linear programming model. The case study shows the effectiveness of the proposed model with IEEE RTS79 system. The results suggest that considering DSM in the transmission expansion planning can effectively reduce the transmission expansion investment and the total carbon emissions, which can improve overall benefits of the power system. © 2016 Automation of Electric Power systems Press.

关键词： Demand side management

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Flexible polymer/multi-walled carbon nanotube composite sensor array equipped with microheater for gas sensing

Flexible polymer/multi-walled carbon nanotube composite sens...

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International Conference on Manipulation, Automation and Robotics at Small Scales (MARSS)

作者： Chin-Cheng Wu Jin-Chern Chiou Yu-Ping Wang Li-Chun Wang Department of Electrical and Computer Engineering Institute of Electrical and Control Engineering National Chiao Tung University Hsinchu Taiwan Chemical System Research Division National Chung-Shan Institute of Science and Technology Taoyuan Taiwan

ISBN: (纸本)9781509015115

A polymer/multi-walled carbon nanotube (MWCNT) composite sensor array based on a flexible polyimide substrate equipped with a thermostatic microheater to provide different working temperatures was developed for gas sensing. The thermostatic microheater provided nine working temperatures ranging from 20°C to 60°C. Each microheater element included a 3 × 3 polymer/MWCNT composite sensor array, which is composed of MWCNTs and polymer composite, as a sensing material. The device was developed to investigate the effect of device temperature on the response of polymer/MWCNT composite gas sensor arrays. The response to ethanol at different temperatures showed resistance variation but similar performance for the proposed gas sensor array.

关键词： Polymers Temperature sensors Sensor arrays Gas detectors Films Carbon nanotubes

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Unit Commitment Considering Demand Response Behavior Based on Utility Maximization

Unit Commitment Considering Demand Response Behavior Based o...

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IEEE Conference on Energy Internet and Energy system Integration

作者： Yumin Zhang Xueshan Han Bo Xu Li Zhang Donglei Sun Xiaofeng Miao Jiayin Jiang Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong University State Key Laboratory of Control and Simulation of Power Systems and Generation Equipment (Department of Electrical Engineering Tsinghua University) Economic & Technology Research Institute of State Grid Shandong Electric Power Company State Grid Shandong Electric Power Company Yantai Electric Power Company

ISBN: (纸本)9781538614280

The active participation of demand side resources in power grid operation not only benefits the individual participant but also benefits the whole system. The optimal goal can promote by excavating the active behaviors of demand side. The welfare maximization of market participant is the driving force of such active behaviors. Considering the independence of each user's behavior, the consumer's utility function is selected to depict consumer's preference and demand response behavior. In order to coordinate the consumers' maximum welfare with social welfare maximization, consumers' utility function and units' operation cost are integrated into Unit Commitment (UC) model. The objective function is to maximize social welfare, by subtracting units' operation cost from consumers' total utility, and this objective can be acquired. Considering the proposed model should be solved in a distributed manner, the idea of the centralized coordination and the decentralized decision-making is proposed. Based on the Lagrangian relaxation (LR) principle and distributed real-time pricing scheme, a closed-loop feedback mechanism is constructed to reflect the relationship among generator output, price level, and load demand. The ten generating units example can illustrate the effectiveness of the proposed method.

关键词： Demand utility Decomposition coordination Electricity market Lagrangian relaxation Real-time pricing Unit commitment

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