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3rd International Conference on Materials Science and Information Technology, MSIT 2013

作者： Yang, Guo Feng Zhao, Jia Kui Li, Ting Shun Zhou, Jing School of Economics and Management North China Electric Power University Beijing China Ningxia Electric Power Company Yinchuan China Beijing China-Power Information Technology Co. Ltd State Grid Electric Power Research Institute Beijing China School of Control and Computer Engineering North China Electric Power University Beijing China

ISBN: (纸本)9783037857700

The risk evaluation of empty mine mined-out area is of great significance to the security and stability of the power facilities. But influence evaluation of empty mine mined-out area factor multitudinous, this paper selected seven factors associated with the system. Based on the principle of BP neural network, we build a 3 layer BP neural network model suitable for grid risk evaluation. The BP neural network model was trained by collected samples of empty mine mined-out area and the logical parameters of BP neural network were acquired and tested by the testing samples for accuracy, and finally we proposes preventive measures based on the evaluation. © (2013) Trans Tech Publications, Switzerland.

关键词： Network layers

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Direct Localization of Multiple Sources in Sensor Array Networks: A Joint Sparse Representation of Array Covariance Matrices Approach

Direct Localization of Multiple Sources in Sensor Array Netw...

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IEEE Internatonal Conference on Mobile Adhoc and Sensor Systems (MASS)

作者： Ji-An Luo Zhi Wang Yu-Hen Hu Hangzhou Dianzi University Institute of Information and Control China Zhejiang University The State Key Laboratory of Industrial Control Technology China Dept. Electrical and Computer Engineering University of Wisconsin-Madison WI U. S. A

A novel sparse representation based multi-source localization method is presented in this work. We envision a wireless network infrastructure containing multiple phase arrays of acoustic sensors. With multiple arrays, direct estimation of a set of source locations is achieved using a new joint sparse representation of array covariance matrices (JSRACM). This representation transforms the source location estimation problem into a spatial sparse signal representation (SSSR) optimization problem. To mitigate the high computation complexity of JSRACM, a novel binary sparse indicative vector (SIV) is introduced to represent the support of joint SSSR of array covariance matrices. As such, the multiple source locations may be estimated by solving an unconstrained optimization problem of the SIV vector using existing FOCUSS-like algorithms. The resulting SIVR-JSRACM algorithm does not require prior information of the number of sources nor initial source location estimates. It promises super-resolution, robustness to noise, and low computing complexity which is independent of the number of sensor phase arrays. Simulation results demonstrate superior performance of the proposed algorithm.

关键词： Arrays Vectors Covariance matrices Noise Signal processing algorithms Joints Dictionaries

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Cyclic scheduling of multimodal processes in mesh-like environment

Cyclic scheduling of multimodal processes in mesh-like envir...

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International Conference on Emerging Technologies and Factory Automation (ETFA)

作者： Grzegorz Bocewicz Wojciech Muszyński Zbigniew Banaszak Department of Computer Science and Management Koszalin University of Technology Koszalin Poland Department of Business Informatics Warsaw University of Technology Warsaw Poland Institute of Computer Engineering Control and Robotics Wrocław University of Technology Wroclaw Poland

A processes composed of sequences of local cyclic The theoretical prediction of the behavioral properties of periodic structures is less difficult than in the case of nonperiodic ones. That is because all the information needed to describe the entire structure is given by the elementary substructure itself and by the manner it repeats in the whole periodic structure. So, only a small portion of the structure (which includes the repeating substructure) needs to be considered to obtain the properties of the whole periodic structure. In that context, the contribution provides the discussion of some system periodicity issues, and is aimed at modeling and evaluation of relationships linking the system structure features with required system's functioning.

关键词： Periodic structures Gears Wheels Transportation Cities and towns Dispatching Job shop scheduling

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Planning with a Task Modeling Framework in Manufacturing Robotics

Planning with a Task Modeling Framework in Manufacturing Rob...

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IEEE/RSJ International Conference on Intelligent Robots and Systems

作者： Jacob Huckaby Stavros Vassos Henrik I. Christensen Center for Robotics & Intelligent Machines Georgia Institute of Technology Atlanta GA 30332 USA Department of Computer Control and Management Engineering Sapienza University of Rome 00185 Rome Italy

ISBN: (纸本)9781467363563

In this paper we present the idea that by using AI planning in concert with formal task modeling, the overhead associated with plan creation for complex tasks can be reduced. The proposed approach uses a SysML taxonomy to model the system capabilities and the process specification, and the PDDL planning language to determine acceptable objective solutions. This idea is applied to the manufacturing domain, and examples are shown modeling a multi-robot system in an automobile manufacturing environment. A discussion is given regarding the merits of the demonstrated approach.

关键词： process specification Planning Modeling robotics Automobile manufacture multi-robot systems

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Online and Remote Machine Condition Monitoring and Fault Diagnosis System Using Wireless Sensor Networks

Online and Remote Machine Condition Monitoring and Fault Dia...

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2013 15th IEEE International Conference on Communication Technology

作者： Yanyu Zhang Peng Zeng Guang Yang Jinying Li Key Lab.of Networked Control System Shenyang Institute of AutomationChinese Academy of Sciences School of Computer and Information Engineering Henan University University of Chinese Academy of Sciences

ISBN: (纸本)9781479900763

Motor systems are critical equipment in modern *** make the equipment maintenance more efficient,this paper proposes an online and remote machine condition monitoring and fault diagnosis system for motor system based on WIA-PA(Wireless network for Industry Automation Process Automation).The system continuously monitors the status of the target motor systems using wireless vibration *** extracting the feature of vibration signals,the wireless vibration transmitters send feature data to host computer through WIA-PA wireless sensor *** data are processed further in host computer to make diagnosis for the motor system using the customized expert *** paper describes the structure of the system,vibration transmitter,WIA-PA wireless network and host computer system in *** proposed system was tested in field,and the results are presented.

关键词： Condition-based maintenance Fault diagnosis Industrial wireless sensor network WIA-PA Vibration transmitter

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Obstacle avoidance in formation using navigation-like functions and constraint based programming

Obstacle avoidance in formation using navigation-like functi...

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2013 IEEE/RSJ International Conference on Intelligent Robots and Systems

作者： Michele Colledanchise Dimos V. Dimarogonas Petter Ögren Centre for Autonomous Systems Computer Vision and Active Perception Lab School of Computer Science and Communication The Royal Institute of Technology - KTH Stockholm Sweden Centre for Autonomous Systems Automatic Control Lab School of Electrical Engineering The Royal Institute of Technology - KTH Stockholm Sweden

In this paper, we combine navigation function-like potential fields and constraint based programming to achieve obstacle avoidance in formation. Constraint based programming was developed in robotic manipulation as a technique to take several constraints into account when controlling redundant manipulators. The approach has also been generalized, and applied to other control systems such as dual arm manipulators and unmanned aerial vehicles. Navigation functions are an elegant way to design controllers with provable properties for navigation problems. By combining these tools, we take advantage of the redundancy inherent in a multi-agent control problem and are able to concurrently address features such as formation maintenance and goal convergence, even in the presence of moving obstacles. We show how the user can decide a priority ordering of the objectives, as well as a clear way of seeing what objectives are currently addressed and what are postponed. We also analyze the theoretical properties of the proposed controller. Finally, we use a set of simulations to illustrate the approach.

关键词： Navigation Convergence Programming Collision avoidance Robots Maintenance engineering

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Fuzzy Logic in Classification of Radio Communication Signals

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通讯和计算机（中英文版） 2013年第2期10卷 207-213页

作者： Zuzana Didekova Beata Mikovicova Institute of Control and Industrial Informatics Faculty of Electrical Engineering and Information Technology Slovak Universityof Technology (FEI STU) in Bratislava Bratislava 81219 SlovaMa Laboratory of Computer Science Signal and lmage Processing Electronics and Telecommunications Institute SuperiorElectronic of Paris (ISEP) Paris 75006 France.

Characterization of radio communication signals aims at automatic recognition of different characteristics of radio signals in order to detect their modulation type, the central frequency, and the level. The authors" purpose is to apply techniques used in image processing in order to extract pertinent characteristics. To the single analysis (recognition of membership of certain frequency signal to a radio communication using its characteristics), the authors add several rules for checking the consistency of hypotheses using fuzzy logic. This allows taking into account ambiguity and uncertainty that may remain after the extraction of individual characteristics. The task has been realized in MATLAB. The aim is to improve the process of radio communications characterization.

关键词：通信信号模糊逻辑无线电分类 MATLAB 中心频率信号特征无线通信

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On the achievable capacity of dual-polarized antenna systems in 3D indoor scenarios

On the achievable capacity of dual-polarized antenna systems...

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IEEE International Conference on Communications in China (ICCC)

作者： Fengxiang Wang Xiang Cheng Liuqing Yang Bo Yu Bingli Jiao School of Electronics Engineering & Computer Science Peking University Beijing China State Key Laboratory of Management and Control for Complex Systems Institute of Automation Chinese Academy of Sciences Beijing China Department of Electrical and Computer Engineering Colorado State University Fort Collins CO USA

Unlike triple-polarized antennas, dual-polarized antennas can be easily implemented into thickness limited devices and thus have received much attention recently. Dual-polarized antennas have the potential to double the channel capacity in comparison with an omnidirectional single-input single-output (SISO) system. However, in real three-dimensional (3D) scenarios, dual-polarized antennas cannot capture the arriving power from the third polarization direction, which is orthogonal to the two-dimensional (2D) polarization plane. This will lead to power loss, which may significantly affect the resultant channel capacity. By proposing a novel two-sphere single-bounced geometry-based stochastic model (GBSM) and rigorously analyzing the change of polarization after single-bounced scattering, this paper studies the impact of the power loss on the channel capacity and specifies the conditions under which the channel capacity of dual-polarized systems is even worse than that of omnidirectional SISO systems. Not only that this is the first endeavor on this subject, but also this work is of practical importance in guiding appropriate deployment of dual-polarized antennas in real 3D indoor scenarios.

关键词： Three-dimensional displays Antennas Channel capacity Vectors Signal to noise ratio Correlation Azimuth

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Cooperative Data Dissemination via Space-Time Network Coding in Vehicular Networks

Cooperative Data Dissemination via Space-Time Network Coding...

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IEEE Global Communications Conference

作者： Xia Shen Rongqing Zhang Xiang Cheng Liuqing Yang Bingli Jiao School of Electronics Engineering and Computer Science Peking University Beijing China State Key Laboratory of Management and Control for Complex Systems Institute of Automation Chinese Academy of Sciences Beijing China

ISBN: (纸本)9781479913510

In this paper, we for the first time consider the space-time network coding (STNC) to propose a novel cooperative data dissemination strategy in the time-division multiple access (TDMA) manner for the vehicle network, to overcome the short-comings of the traditional network coding (NC) techniques with carrier sense multiple access/collision avoidance (CSMA/CA) protocol, i.e., high signal detection complexity and channel collision problem. An optimal relay selection strategy in the procedure of cooperative data dissemination is proposed to maximize the average system capacity for the data dissemination. In a addition, a suboptimal relay selection strategy is put forward to reduce the computation complexity and thus makes the developed data dissemination strategy more practical. Compared with the non-cooperative data dissemination, the proposed cooperative data dissemination via STNC has better performance in terms of the average system capacity, the average user equipment (UE) capacity, and the average data dissemination delay.

关键词： STNC first time average system capacity

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The improved load balance adjustor of multi-motor driving system

The improved load balance adjustor of multi-motor driving sy...

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Chinese control Conference (CCC)

作者： Jing Ming Yang Bo Su Jin Lv Hai Jun Che Key Lab of Industrial Computer Control Engineering of Hebei Province Yanshan University Qinhuangdao 066004 China Tian Jin Design and Research Institute of Electric Drive Tianjin 300180 China

Multi-motor coaxial connected are used to drive large mechanical load motor drive system. Multi-motor driver's main advantage is can reduce the rotational inertia of the load, increase the rapidity of system, but followed by many motor driver control difficulty increase. Based on one tandem mill motor drive as the background, analyzes the series motor drive a rack rolling work mode, aiming at the load problem of this way of driving motor, design a new kind of load balance adjustor. Using load observer to get the actual load as the load balance adjustor's input, the new control method of quadratic performance indicators single neuron adaptive PID, and joined the feed forward compensation to inhibit speed fluctuations. The results show that, this method can substantially ensure the roll motor load balance, while having a good control effect.

关键词： Observers Neurons Motor drives MATLAB Design methodology Channel hot electron injection Digital control

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