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2012 International Conference on Medical Physics and Biomedical engineering(ICMPBE 2012)

作者： Lei Miao Shujia Qin Baolei Xu Hongyi Li Ning Xi Chunmin Yang The State Key Laboratory of Robotics Shenyang Institute of Automation(SIA)Chinese Academy of Sciences(CAS) Graduate School of the Chinese Academy of Sciences Department of Electrical and Computer Engineering Michigan State University(MSU) The GI department of Air force General Hospital

Giant magnetoimpedance(GMI) sensor has obvious advantages of low cost and high sensitivity compared with many other *** paper shows the current measurement result based on GMI *** setup the experiment system to acquire the data via distance *** the paper shows the theoretical results,which is compared to the real experiment *** the real data analysis results,we conclude that GMI sensor may be calibrated.

关键词： Magnetic flux density GMI sensor Calibration Measurement

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Flexible triangular formation keeping of marine robotic vehicles using range measurements 1

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IFAC Proceedings Volumes 2014年第3期47卷 5145-5150页

作者： Francisco Rego Jorge M. Soares António Pascoal A. Pedro Aguiar Colin Jones Laboratory of Robotics and Systems in Engineering and Science Instituto Superior Técnico University of Lisbon Lisbon Portugal Department of Electrical and Computer Engineering Faculty of Engineering University of Porto Porto Portugal Institute of Mechanical Engineering School of Engineering École Polytechnique Fédérale de Lausanne Lausanne Switzerland Distributed Intelligent Systems and Algorithms Laboratory School of Architecture Civil and Environmental Engineering École Polytechnique Fédérale de Lausanne Lausanne Switzerland National Institute of Oceanography Dona Paula Goa India

This paper addresses the problem of keeping an autonomous marine vehicle in a moving triangular formation by regulating its position with respect to two leader vehicles. The follower vehicle has no prior knowledge of the path described by the leaders but has access to their heading angle and is able to measure inter-vehicle ranges. It is assumed that the distance between the leaders is constant and known. A control strategy is adopted that generates speed and heading commands so as to drive suitably defined along track and cross track errors to zero. The commands are used as input to local inner loops for yaw and speed control. The paper describes the algorithms derived for range-based control and assesses their performance in simulations using realistic models of the vehicles involved. Tests with three autonomous marine vehicles equipped with acoustic modems and ranging devices allow for the evaluation of the performance of the algorithms in a real-world situation.

关键词： Autonomous Vehicles Marine systems Control Laws Formation Control Station Keeping Triangular Formations

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Social Adaptation of Robots for Modulating Self-Organization in Animal Societies

Social Adaptation of Robots for Modulating Self-Organization...

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IEEE International Conference on Self-Adaptive and Self-Organizing systems Workshops, SASOW

作者： Payam Zahadat Michael Bodi Ziad Salem Frank Bonnet Marcelo Elias De Oliveira Francesco Mondada Karlo Griparic Tomislav Haus Stjepan Bogdan Rob Mills Pedro Mariano Luis Correia Olga Kernbach Serge Kernbach Thomas Schmickl Artificial Life Laboratory of the Department of Zoology Karl-Franzens University Graz Austria Computer Engineering Department Aleppo University Syrian Arab Republic Rbotic Systems Laboratory Swiss Federal Institute of Technology (EPFL) Lausanne Switzerland Ecole Polytechnique Federale de Lausanne Lausanne VD CH Faculty of Electrical Engineering and Computing Laboratory for Robotics and Intelligent Control Systems Zagreb Croatia Universidade de Lisboa Lisboa Lisboa PT Cybertronica Research Research Center of Advanced Robotics and Environmental Science Stuttgart Germany

The goal of the work presented here is to influence the overall behaviour of specific animal societies by integrating computational mechatronic devices (robots) into those societies. To do so, these devices should be accepted by the animals aspart of the society and/or as part of the collectively formed environment. For that, we have developed two sets of robotic hardware for integrating into societies of two different animals: zebra fish and young honeybees. We also developed mechanisms to provide feedback from the behaviours of societies for the controllers of the robotic system. Two different computational methods are then used as the controllers of the robots in simulation and successfully adapted by evolutionary algorithms to influence the simulated animals for desired behaviours. Together, these advances in mechatronic hardware, feedback mechanisms, and controller methodology are laying essential foundations to facilitate experiments on modulating self-organised behaviour in mixed animal -- robot societies.

关键词： Animals Heating Vibrations Robot sensing systems Hardware Biochemistry

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Program-based and model-based PLC design environment for multicore FPGA architectures

Program-based and model-based PLC design environment for mul...

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International Conference on Informatics in Control, automation and robotics (ICINCO)

作者： Christoforos Economakos Michael Skarpetis George Economakos Technological Educational Institution of Sterea Ellada Department of Automation Engineering GR34400 Psahna Evia Greece National Technical University of Athens School of Electrical and Computer Engineering Microprocessors and Digital Systems Laboratory Heroon Polytechniou 9 GR15780 Zografou Greece

Digital design has been growing rapidly during the last years, offering advanced implementation solutions for a diversity of appliances and instruments, integrating different sensors and actuators. This has a great impact on embedded automation, where traditional Programmable Logic Controllers (PLCs) have been gradually replaced by high performance Embedded Controllers, Digital Signal Processor (DSP) chips and, more recently, power efficient Field Programmable Gate Arrays (FPGAs). Such new implementation platforms bring together efficient design methodologies, like model-based design and high-level or C level program-based design. In their turn, new design methodologies are accompanied by new design technologies like Intellectual Property (IP) based design and High-Level Synthesis (HLS). This paper presents a design environment that utilizes program-based and model-based design, for the development of PLC applications. Specifically, a tool flow is constructed that supports either the design of new control algorithms or the translation of existing algorithms into C. Then, HLS and FPGA implementation tools are adopted, to implement the selected algorithms as multicore, embedded designs, offering performance improvements and hardware utilization efficiency. Overall, the proposed methodology and underlying tool flow support a novel high productivity prototyping platform for digital control applications, with very promising future extension capabilities.

关键词： Field programmable gate arrays Algorithm design and analysis Hardware Digital signal processing Signal processing algorithms Microcontrollers Hardware design languages

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Index modulated OFDM with ICI self-cancellation in underwater acoustic communications

Index modulated OFDM with ICI self-cancellation in underwate...

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Asilomar Conference on Signals, systems & computers

作者： Miaowen Wen Yuke Li Xiang Cheng Liuqing Yang School of Electronic and Information Engineering South China University of Technology Guangzhou China State Key Laboratory of Management and Control for Complex Systems Institute of Automation Chinese Academy of Sciences Beijing China School of Electronics Engineering and Computer Science Peking University Beijing China Department of Electrical and Computer Engineering Colorado State University Fort Collins CO USA

ISBN: (纸本)9781479982981

OFDM is promising for underwater acoustic (UWA) communications due to its potential to combat the large delay spread. However, the performance of the OFDM system is seriously deteriorated by the inter-carrier interference (ICI) caused by the transmitter/receiver motion and ocean waves. In this paper, we propose a novel ICI countermeasure. The key idea is to inactivate partial subcarriers according to index modulation and meanwhile transmit signals with opposite polarity on two adjacent active subcarriers for ICI self cancellation. Simulation results validate that the proposed scheme achieves much better bit error rate (BER) performance than many existing schemes in UWA communications.

关键词： OFDM Modulation Bit error rate Indexes Receivers Transmitters Sonar equipment

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Semi-Global Output Consensus of Linear Agents with External Disturbances and Actuator Saturation:An Output Regulation Approach

Semi-Global Output Consensus of Linear Agents with External ...

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第三十三届中国控制会议

作者： Zhiyun Zhao Yiguang Hong Zongli Lin Department of Automation and Key Laboratory of System Control and Information Processing of the Ministry of EducationShanghai Jiao Tong University Key Laboratory of Systems and Control Academy of Mathematics and Systems ScienceChinese Academy of Sciences Charles L. Brown Department of Electrical and Computer Engineering University of VirginiaP.O. Box 400743Charlottesville VA 22904-4743 U.S.A.

This paper studies semi-global leader-following output consensus of a multi-agent system. Each follower agent in the system, described by a general linear system subject to external disturbances and actuator saturation, is to track the leader agent. Conditions on the agent dynamics are identified under which a low gain feedback based linear state control algorithm is constructed for each follower agent such that the leader-following output consensus is achieved when the communication topology among the agents is a directed graph that contains no loop and the leader is globally reachable. In addition, discussions and simulations are also provided for the output consensus in the presence of actuator saturation.

关键词： Leader-following output consensus,low gain feedback,multi-agent systems,actuator saturation

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Predicting the Speed of a Wave Glider Autonomous Surface Vehicle from Wave Model Data

Predicting the Speed of a Wave Glider Autonomous Surface Veh...

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IEEE/RSJ International Conference on Intelligent Robots and systems

作者： Phillip Ngo Jnaneshwar Das Jonathan Ogle Jesse Thomas Will Anderson Ryan N. Smith School of Electrical Engineering and Computer Science Queensland University of Technology Brisbane QLD 4001 Australia Robotic Embedded Systems Laboratory University of Southern California Los Angeles CA USA Physics and Engineering Department Fort Lewis College Durango CO USA Liquid Robotics Inc. Sunnyvale CA USA

ISBN: (纸本)9781479969357

A key component of robotic path planning for monitoring dynamic events is reliable navigation to the right place at the right time. For persistent monitoring applications (e.g., over months), marine robots are beginning to make use of the environment for propulsion, instead of depending on traditional motors and propellers. These vehicles are able to realize dramatically higher endurance by exploiting wave and wind energy, however the path planning problem becomes difficult as the vehicle speed is no longer directly controllable. In this paper, we examine Gaussian process models to predict the speed of the Wave Glider autonomous surface vehicle from observable environmental parameters. Using training data from an on-board sensor, and wave parameter forecasts from the WAVEWATCH III model, our probabilistic regression models create an effective method for predicting Wave Glider speed for use in a variety of path planning applications.

关键词： Ground vehicles Path planning Vehicle speed speed Crucial components A wave

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A control model of active magnetic bearings

A control model of active magnetic bearings

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3rd International Conference of engineering Against Failure, ICEAF 2013

作者： Farmakopoulos, Michael G. Thanou, Michalis D. Nikolakopoulos, Pantelis G. Papadopoulos, Chris A. Tzes, Anthony P. Machine Design Laboratory Department of Mechanical Engineering and Aeronautics University of Patras Patras-26504 Greece Automation and Robotics Laboratory Electrical and Computer Engineering Department University of Patras Patras-26504 Greece

ISBN: (纸本)9789608810433

Active magnetic bearings (AMBs) support a rotating shaft, inside a stator, contactless. Their major benefit in respect to hydrodynamic journal bearings is the possibility of operating in much higher rotational speeds (above 20.000 RPM). This is due to the fact that, their angular velocity is only limited by the strength of the shaft material and always they have stabilized operation without any mechanic contact. Also, AMBs are resulting in long life time, without the use of any lubrication system, eliminating thus the complexity of the lubricant network and promoting green operation of the rotating machines. Furthermore, the electromagnetic bearings are active elements that allow the measurement and the control of the position of the shaft, targeting in most accurate equilibrium positions, in terms of the shaft operation. Therefore, a suitable control system is required for a magnetic bearing, to exploit the above advantageous operational characteristics. In this study, the model of the control system of a Magnetic Bearing in terms of sensors and power amplifiers is presented and its design guidelines are explicitly described. As a first step, the non linear equation of the movement of the shaft inside the magnetic bearing, in one direction (y-axis), is introduced. Then, the linearization of this particular equation in a specific equilibrium point is performed and presented. Consequentially, the linear equation is transformed via Laplace method and the model of the Active Magnetic Bearing is finally developed. In addition to these, the sensor and the power amplifiers are modeled, to simulate the AMB system as a whole. The Matlab software is used to simulate the components that the AMB is consisted of. The P, I and D gains are the result of this simulations, which are produced via robust control method, in Single-Input-Single-Output (SISO) tool module of Matlab. At the end, the Simulink module of Matlab is energized to check the control characteristics of the develop

关键词： Robust control

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An Overview of the Triangle of Knowledge as a Driving Force for Sustainable Growth in Developing Nations

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IFAC Proceedings Volumes 2013年第8期46卷 106-115页

作者： P.P. Groumpos Department of Electrical and Computer Engineering Laboratory for Automation and Robotics University of Patras Patras Greece

Today's challenging and critical world situation is briefly reviewed. Mathematical and geometrical approaches to the Knowledge Triangle (KT) concept are outlined and analyzed. The Triptych: Education + Research+ Innovation has been used in the definition of the Knowledge Triangle (KT). The relationship of the KT and the Lisbon Strategy is presented and discussed. The European Institute of Technology (EIT) is briefly mentioned which also uses the KT but in addition is taking into consideration the important component of Entrepreneurship. A new approach to explore an expanded triptych of KT, by adding the Entrepreneurship-Business component (K-E+R-I+E-B), is attempted and a new definition is developed by exploring better the geometric triangle schema and the expanded triptych. The new term been introduced is the Triangle of Knowledge (ToK). It is fully explained and justified for this new approach using the expanded (K-E+R-I+E-B) fundamental concepts. The Triangle of Knowledge (ToK) guarantees the full and dynamic interaction between all components needed for the sustainable development-growth of a Region-Country. The different funding schemes are considered and the pyramid for sustainable development is presented for the first time especially for Developing Nations. This new approach seems to address better many fundamental issues and problems of the Knowledge-Based-Society (KBS). The important role that Control can play in the further development and mathematical study of the new proposed concept for the Triangle of Knowledge (ToK) is briefly formulated and analyzed. Interesting and future research directions for the proposed new approaches are presented and discussed

关键词： sustainable development economic models knowledge triangle systems theory control triangle of knowledge

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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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