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25th International Ocean and Polar engineering Conference, ISOPE 2015

作者： Dorozhko, Veniamin M. Bugaev, Victor G. Kitaev, Maksim V. Lab of High-Precision Optical Methods of Measurement Institute of Automation and Control Processes Far Eastern Branch of Russian Academy of Sciences Russia Dept. of Shipbuilding and Ocean Engineering School of Engineering Far Eastern Federal University Vladivostok Russia

ISBN: (纸本)9781880653890

Extreme waves up to 30m are dangerous for ships and marine engineering structures. During 2006-2010 years the 78 cases have been registered in different sites of the World ocean. From design point of view, it is interesting to know the extreme wave environment, corresponding impact loads on ships and marine structures. The impossibility of full-scale experiments lead application of numerical simulation. The paper presents a numerical procedure and the results of an extreme wave impact on a ship. A special generation method was developed. The propagation and breaking stage of extreme wave life cycle are in the center of attention. The appearance of two maxima of the extreme wave were found using 2D model of hull mid section. The numerical technology allows a designer to assess the stability of a ship by means the plane section method. Obtained technique and the results of numerical simulation can be used for ship and marine engineering structures design process and navigation safety area. Copyright © 2015 by the International Society of Offshore and Polar Engineers (ISOPE).

关键词： Numerical models

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Smart Sensor Based Obstacle Detection for High-Speed Unmanned Surface Vehicle

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IFAC-PapersOnLine 2015年第16期48卷 190-197页

作者： D. Hermann R. Galeazzi J.C. Andersen M. Blanke Automation and Control Group Dept. of Electrical Engineering Technical University Denmark Lyngby Denmark AMOS CoE Dept. of Engineering Cybernetics Norwegian University of Science and Technology Trondheim Norway

This paper describes an obstacle detection system for a high-speed and agile unmanned surface vehicle (USV), running at speeds up to 30m/s. The aim is a real-time and high performance obstacle detection system using both radar and vision technologies to detect obstacles within a range of 175 m. A computer vision horizon detector enables a highly accurate attitude estimation despite large and sudden vehicle accelerations. This further facilitates the reduction of sea clutter by utilising a attitude based statistical measure. Full scale sea trials show a significant increase in obstacle tracking performance using sensor fusion of radar and computer vision.

关键词： Obstacle detection Sensor fusion Unmanned surface vehicle

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FAULT DIAGNOSIS OF NETWORKED control SYSTEMS

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IFAC Proceedings Volumes 2006年第13期39卷 1-12页

作者： Huajing Fang Hao Ye Maiying Zhong Dept. of Control Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China Dept. of Automation Tsinghua University Beijing 100084 China School of Control Science and Engineering Shandong University Jinan 250061 China

Networked control systems (NCS) are systems with at least one loop closed through data networks. NCS have many advantages compared with traditional systems, however the network-induced delay and other peculiarities of communication channel will degrade the performance of closed-loop systems. Supported by National Nature Science Foundation of China, we studied the fault diagnosis and fault-tolerant control theory for NCS in recent years. This plenary talk will summarize the main ideas and results on fault diagnosis of NCS, including fault detection for NCS with information scheduling, for NCS with network induced time delay and for NCS with random time delay based on quasi Takagi-Sugeno fuzzy models.

关键词： Fault diagnosis fault detection networked control system time-delay systems optimization fault tolerance fuzzy modelling periodic systems

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Modeling Method and Simulation Analysis of Smart Substation Protection Scheme Based at OPNET Process Level

Modeling Method and Simulation Analysis of Smart Substation ...

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2021 IEEE Sustainable Power and Energy Conference, iSPEC 2021

作者： Feng, Teng Han, Liu Xiao, Zhihong Lu, Jialiang Yang, Shenghui He, Ruiwen State Grid Economic and Technological Research Institute Co. Ltd. Automation and Control Design Research Center Beijing China Guangdong University of Technology Dept. of Electrical Engineering Guangzhou China

ISBN: (纸本)9781665414395

Process layer network and its intelligent electronic devices (IED) are the basic equipments that constitute the relay protection in smart substation. In order to further achieve the standardization and accuracy of the process layer relay protection, a method of constructing the protection scheme based on the OPNET process level is proposed. Based on Standard IEC 61850, logic transition modeling of IED application layer at process level is achieved, and the simulation of the whole protection scheme including data acquisition by electronic transformer, operation and decision-making of protection unit and action of intelligent terminal is realized. Combining the examples of protection processes in line bay and transformer bay, the operation mechanism and working principle of the models are explained, the validity and feasibility of the protection scheme are verified. A good simulation analysis tool and platform for engineering applications are provided. © 2021 IEEE.

关键词： Electric power system protection

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Evaluations of different Simultaneous Localization and Mapping (SLAM) algorithms

Evaluations of different Simultaneous Localization and Mappi...

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38th Annual Conference on IEEE Industrial Electronics Society, IECON 2012

作者： Tuna, Gurkan Gulez, Kayhan Cagri Gungor, V. Veli Mumcu, T. Trakya University Department of Computer Programming Edirne Turkey Yildiz Technical University Electrical-Electronics Faculty Control and Automation Eng. Dept. Istanbul Turkey Bahcesehir University Faculty of Engineering Department of Computer Engineering Istanbul Turkey

ISBN: (纸本)9781467324212

Simultaneous Localization and Mapping (SLAM) algorithms with multiple autonomous robots have received considerable attention in recent years. In general, SLAM algorithms use odometry information and measurements from exteroceptive sensors of robots. The accuracy of these measurements and the performance of the corresponding SLAM algorithm directly affect the overall success of the system. This paper presents comparative performance evaluations of three Simultaneous Localization and Mapping (SLAM) algorithms using Extended Kalman Filter (EKF), Compressed Extended Kalman Filter (CEKF) and Unscented Kalman Filter (UKF). Specifically, it focuses on their SLAM performances and processing time requirements. To show the effect of CPU power on the processing time of SLAM algorithms, two notebooks and a netbook with different specifications have been used. Comparative simulation results show that processing time requirements are consistent with the computational complexities of SLAM algorithms. The results we obtained are consistent with the CPU power tests of independent organizations and show that higher processing power decreases processing time accordingly. The results also show that CEKF is more suitable for outdoor SLAM applications where there are a lot of natural and artificial features. © 2012 IEEE.

关键词： Extended Kalman filters

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Sampled-data Fuzzy Observer Design for State Estimation of Uncertain Systems under Imperfect Premise Matching

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Transactions of the Korean Institute of Electrical Engineers 2019年第11期68卷 1403-1410页

作者： Kim, Han Sol Joo, Young Hoon School of IT Information and Control Engineering Kunsan National Univerity Korea Republic of Dept. of Control and Automation Engineering Korea Maritime and Ocean University Korea Republic of

In this paper, we propose a sampled-data fuzzy observer design technique for estimating the state variables of a nonlinear system with model uncertainty. It is assumed that the IF-THEN rules of the fuzzy system contains immeasurable premise variables, which complicates the observer design. In this paper, the observer is assumed not to share the same premise part with that of the system in order to deal with the immeasurable premise condition. After then, the error between the observer and the system including model uncertainty is represented by the Takagi-Sugeno (T-S) fuzzy model. In order to minimize the impact of imperfect premise matching, model uncertainty, and disturbances on the state estimation, an H∞ performance criterion is defined. Based on the fuzzy Lyapunov function, we derive a sufficient condition in the form of linear matrix inequality to ensure that the error dynamics is asymptotically stable and satisfy the H∞ condition. Finally, a simulation example verifies the superiority of the proposed method. Copyright © The Korean Institute of Electrical Engineers

关键词： Linear matrix inequalities

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Load response towards voltage in TNB power system using the measurement approach

Load response towards voltage in TNB power system using the ...

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1st International Power and Energy Conference, PECon 2006

作者： Bakar, Abdul Halim Abu Yusof, Sallehhudin Satchiananda, Malini Mekhilef, Saad IEEE Maintenance Transmission Division TNB CIGRE Malaysian National Committee of CIGRE IEEE Power Engineering Society GE Energy Malaysia Dept. of Electrical Engineering University Malaya Centre for Research in Power Electronics and Drives Automation and Control

ISBN: (纸本)1424402735

This paper reports the load-voltage dependency using field measurements for a faulted condition that caused a momentary voltage sag in a Tenaga Nasional Berhad network in the Central Region. The static load model is used in this study and its suitability is discussed in comparison to the dynamic load model. A fast method of calculating real and reactive power based on available information is devised. Propagation of fault through transformers is also investigated. The effect of voltage on real and reactive power is discussed at great length. Various factors influence the load characteristic, including weather, time of day, network conditions and type of feeder load. Long-term steady state data should be made available for analysis to back up results from this study. © 2006 IEEE.

关键词： Reactive power

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Active Fault Diagnosis in Sampled-data Systems

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IFAC-PapersOnLine 2015年第21期48卷 883-888页

作者： Niemann, Henrik Poulsen, Niels Kjolstad 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

The focus in this paper is on active fault diagnosis (AFD) in closed-loop sampleddata systems. Applying the same AFD architecture as for continuous-time systems does not directly result in the same set of closed-loop matrix transfer functions. For continuous-time systems, the LFT (linear fractional transformation) structure in the connection between the parametric faults and the matrix transfer function (also known as the fault signature matrix) applied for AFD is not directly preserved for sampled-data system. As a consequence of this, the AFD methods cannot directly be applied for sampled-data systems. Two methods are considered in this paper to handle the fault signature matrix for sampled-data systems such that standard AFD methods can be applied. The first method is based on a discretization of the system such that the LFT structure is preserved resulting in the same LFT structure in the fault signature matrix as obtained for continuous-time systems. The other method is an approximation method, where the same structure is obtained for small parametric faults. © 2015

关键词： Continuous time systems

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Nonlinear system identification and control design using adaptive wavelet network 6

Nonlinear system identification and control design using ada...

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6th IFAC Symposium on Nonlinear control Systems, NOLCOS 2004

作者： Karimi, H.R. Lohmann, B. Moshiri, B. Jabchdar Maralani, P. Control and Intelligent Processing Center of Excellence Dept. of Electrical and Computer Engineering Faculty of Engineering University of Tehran Tehran Iran Institute of Automation University of Bremen Otto-Hahn-Allee NW1 BremenD-28359 Germany

This paper presents an application of wavelet networks in identification and control design tor a class of non-linear dynamical systems. The technique of feedback linearization, supervisory control and H∞ control are used to design an adaptive control law and also the parameters of the wavelet networks arc adapted using a Lyapunov-based design. By some theorems, it will be proved that even in the presence of modelling errors, named network error, the stability of the overall identification scheme and the convergence of the network parameters and the boundedness of the state errors are guaranteed. Copyright © 2004 IFAC.

关键词： Feedback linearization

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Validation of an LTE backbone for inter-car communications in metro environments 12

Validation of an LTE backbone for inter-car communications i...

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12th European Conference on Antennas and Propagation, EuCAP 2018

作者： Díez, V. Val, I. García, J. Arriola, A. Echeverria, E. López, I. Korta, M. Zabala, I. Aubourg, T. Tichý, T. Communication Systems HW Platforms and Microsystems Dept. IK4-Ikerlan Arrasate-Mondragón Spain Research and Development Dept. CAF Beasain Spain Product Development Dept. CAF Power and Automation Donostia-San Sebastian Spain Control Application Engineering Dept. CAF Power and Automation Donostia-San Sebastian Spain Secured Wireless Products Thales Communications and Security S.A.S Gennevilliers France Research and Development Dept. Unicontrols a.s. Prague Czech Republic

ISBN: (纸本)9781785617911

The introduction of wireless systems to replace wired communications inside trains is currently being faced by the railway industry. Guaranteeing a reliable communication link is a challenge due to the dynamic behavior of the radiofrequency (RF) propagation channel. In this paper, an experimental validation of a Long Term Evolution (LTE) communications system is presented for a metro train backbone. Wireless channels are measured and characterized in different metro scenarios, and a channel emulator is used to recreate the physical RF propagation conditions in laboratory. Two functional scenarios are validated: the train inauguration and the data exchange between consists. Obtained results indicate that Doppler spread mainly influences the LTE uplink, cutting throughput up to 40 %. © Institution of engineering and *** Rights Reserved.

关键词： Electronic data interchange

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