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2010 International Conference on Mechanic Automation and control engineering, MACE2010

作者： Zhang, L. Zheng, D.R. Hu, M. Ba, L. Yang, X.M. School of Mechanical Engineering and Automation Northeastern University Shenyang 110004 China Dept. of Automatic Control Shenyang Institute of Engineering Shenyang 110136 China

ISBN: (纸本)9781424477388

Theoretical studies and experiment analysis of time-domain symmetrical configuration two-probe method are provided in this paper, and the method's feasibility and error separation's precision are discussed. Conclusions can be drawn from the results of simulation and experiment that measurement precision and repeat precision of two-probe method is a little higher that of single-probe method. Though radial random errors can not be separated entirely, the measurement theory of symmetrical configuration two-probe method is simple, and the measurement equipments' precision can be easily ensured. In addition, the data processing can be done directly in time-domain, which is more practicable. Two-probe method is useful in practical measurement. High accuracy can be ensured, especially in the case of measuring the shape errors of big parts with general precision. ©2010 IEEE.

关键词： Random errors

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automatic measurement of the artery intima-media thickness with image empirical mode decomposition

Automatic measurement of the artery intima-media thickness w...

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IEEE International Conference on Imaging Systems and Techniques

作者： Jin, Jing Wang, Yan Gao, Xin Shen, Yi Wang, Qi Lab. of Detection Technology and Automatic Equipment Dept. of Control Science and Engineering Harbin Institute of Technology Harbin 150001 China

ISBN: (纸本)9781424464944

Artery intima-media thickness (IMT) is a useful marker for diagnosis of atherosclerosis. In this paper, we have proposed a new scheme for detection and measurement of the IMT in medical ultrasound images, in which the image empirical mode decomposition (IEMD) is used as the detection part as well as adaptive gray stretching, and watershed segmentation for extracting boundary of intima. To measure the IMT, a new method combing with regional positioning and boundary fitting is adopted. Experimental results show that the proposed scheme can yield a good measurement result, and the calculation time can satisfy the practical requirement. Moreover, our method needs less manual input than others. © 2010 IEEE.

关键词： Empirical mode decomposition

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Open manufacturing control with agile reconfiguring of robot services

Open manufacturing control with agile reconfiguring of robot...

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19th International Workshop on Robotics in Alpe-Adria-Danube Region, RAAD 2010

作者： Borangiu, Th. RǍileanu, S. Trentesaux, D. Berger, T. University Politehnica of Bucharest Dept. of Automatic Control and Applied Informatics Bucharest Romania University Lille Nord of France TEMPO Laboratory F-59000 Lille Valenciennes France

ISBN: (纸本)9781424468867

The paper describes a new, open control paradigm for discrete, repetitive shop floor production, designed as a solution for agile manufacturing reengineering through (a) multi-agent robot service reconfiguring and (b) implementing the robot service access model (RSAM) in a distributed, semi-heterarchical production planning, scheduling and execution control architecture. This distributed architecture integrates two layers with generic functionalities: (1) Dynamic reconfiguring of the resource (robot-vision) service access model RSAM through a multiagent system organization;(2) Holonic manufacturing scheduling (robot allocation), control and tracking based on the PROSA holarchy and the Intelligent Product technology-implemented through intelligent embedded devices (acting as Active Holon Entities) which use OpenEmbedded Linux as real-time operating system. Experimental results are reported from production scenarios tested in the two shopfloor platforms of the Laboratories AIP-PRIMECA (University of Valenciennes) and CIMR (University Politehnica of Bucharest) composed by robot-vision workstations. © 2010 IEEE.

关键词： Multi agent systems

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Modeling and control aspects of long distance telesurgical applications

Modeling and control aspects of long distance telesurgical a...

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IEEE International Joint Conferences on Computational Cybernetics and Technical informatics, ICCC-CONTI 2010

作者： Haidegger, Tamás Kovács, Levente Preitl, Stefan Precup, Radu-Emil Kovács, Adalbert Benyó, Balázs Benyó, Zoltán Dept. of Control Engineering and Information Technology Hungary Politehnica University of Timisoara Dept. of Automation and Applied Informatics Timisoara Romania Politehnica University of Timisoara Dept. of Mathematics Timisoara Romania

ISBN: (纸本)9781424474332

There is an increasing need to support telemedicine with advanced technology. Currently, long distance telesurgical systems are only used on Earth for research purposes, but the military and the space agencies are interested in the spatial extension of effective surgical treatment through remote teleoperation. One of the major limitations of future systems is the communication lag time. In the case of the envisioned human exploratory space missions to Moon and Mars, the signal latency can be several seconds or even minutes. This paper deals with theoretical and practical aspects of the problem. Modeling approaches are discussed, proposing simplified human and machine representations to accommodate long distance telesurgical applications. Further, classical control methods are presented based on cascade control, focusing on teleoperation. A suitable controller can be designed with an empirical controller of the inner loop, based on Kessler methods, while the outer loop can be based on predictive control. © 2010 IEEE.

关键词： Remote control

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Process simulator using PLC technology

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UPB Scientific Bulletin, Series C: Electrical engineering 2010年第2期72卷 17-26页

作者： FǍgǍrãşan, Ioana Iliescu, Sergiu St Dumitru, Iulia Dept. of Automatic Control and Industrial Informatics University Politehnica of Bucharest Romania Faculty of Automatic Control and Computers University Politehnica of Bucharest Romania

The implementation and the achievement of a Process Simulator can replace a vast number of expensive system or function models. The simulation and automation of physical processes reduce the costs and the amount of time needed for deployment. The designed system can be used to simulate, project and train the programming of programmable logical control (PLC) systems graphically and practically. A vast number of masks (an applied mask corresponds to an assignment), showing model systems for different types of application and with different complexity factors, allow us to use the system for training and for practical work in different areas as: energy, transport, chemistry, construction etc. The designed simulator uses only a simulation block for all the application, having different replaceable masks according to the desired application. The Process Simulator uses an industrial programmable logical control.

关键词： Simulators

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RETRACTED ARTICLE: Dynamic feedback equalization algorithm for minimum weight

RETRACTED ARTICLE: Dynamic feedback equalization algorithm f...

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作者： Song, Shouyun Xu, Junpeng Cong, Qing Dept. of Automatic Control Department Henan Mechanical and Electrical Engineering College Xinxiang Henan China Dept. of Mechanical Engineering Henan Institute of Science and Technology Xinxiang Henan China Dept. of Computer and Information Technology Henan University Kaifeng Henan China

ISBN: (纸本)9781424455386

the paper analyzes the existing Linux virtual server (LVS) cluster load balancing algorithm and its inadequacies that not real-time dynamic full makes an appraisal to the load on the each server node, designs a new Dynamic Feedback Equalization Algorithm for Minimum Weight. The algorithm considers real-time load and response capacity of each server node, makes pre-load rate of the server combined with response time, dynamic generates server node weights by real-time feedback and conducts adjust to the load balancing of server cluster by using Minimum weight balancing algorithm. This algorithm has done a comparison with the Weighted Least Connections, theory analysis and experimental results show that the improved dynamic load balancing algorithm is more effective than Weighted Least Connections. © 2010 IEEE.

关键词： Clustering algorithms

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Facilitating independent learning of control basics

Facilitating independent learning of control basics

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UKACC International Conference on control 2010

作者： Rossiter, J.A. Dept. of Automatic Control and Systems Engineering Univ. of Sheffield S. Yorks S1 3JD United Kingdom

ISBN: (纸本)9781846000386

This paper focuses on how to help students engage better with control courses and to learn through doing. In parallel it discusses strategies for encouraging more independent learning into the curriculum. Two main assumptions are made: (i) first that module design needs to embed regular student activity and (ii) student activity mostly involve more than engagement with what is covered in formal lectures. The paper is completed by student evaluations of a large group of students from three different engineering departments.

关键词： Students

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controlling Combustion Phasing of Recompression HCCI with a Switching controller

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IFAC Proceedings Volumes 2010年第7期43卷 821-826页

作者： Hsien-Hsin Liao Nikhil Ravi Adam. F. Jungkunz Anders Widd J. Christian Gerdes Dept. of Mechanical Engineering Stanford University CA USA Dept. of Automatic Control Lund University Sweden

Homogeneous charge compression ignition (HCCI) is more efficient and produces significantly less NO x emissions compared to spark ignitions. Using an exhaust recompression strategy to achieve HCCI, however, produces cycle-to-cycle coupling which makes the problem of controlling combustion phasing more difficult. In the past, a linear feedback controller designed with a single linearized model is effective in controlling combustion phasing around an operating point. However, HCCI dynamics can change dramatically around different operating points such that a single linearization is insufficient to approximate the entire operating range. Further investigation shows that the operating range can be roughly divided into three regions where a linear model can capture the qualitative system behavior in each of the regions. As a result, a three zone switching linear model approximates recompression HCCI dynamics far better than a single linearization. This new model structure also suggests that two of the three regions need completely opposite control actions. Therefore, the approach of using a static feedback control based on a single linearziation cannot be appropriate over the entire operating range. We propose a switching controller based on the switching linear model and achieve very good performance in controlling HCCI combustion phasing throughout the entire operating region. Lastly, a semi-definite programming (SDP) formulation of finding a Lyapunov function for the switching linear model is presented in order to guarantee stability of the switching control scheme.

关键词： HCCI switching control semi-definite programming

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Damping structure selection in nonlinear ship manoeuvring models

Damping structure selection in nonlinear ship manoeuvring mo...

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作者： Perez, Tristan Revestido-Herrero, Elías School of Engineering Discipline of Mechanics and Mechatronics University of Newcastle Callaghan NSW 2308 Australia Trondheim Norway Dept. of Electronic Technology Systems Engineering and Automatic Control University of Cantabria Spain

ISBN: (纸本)9783902661883

This paper presents the application of a statistical method for model structure selection of lift-drag and viscous damping components in ship manoeuvring models. The damping model is posed as a family of linear stochastic models, which is postulated based on previous work in the literature. Then a nested test of hypothesis problem is considered. The testing reduces to a recursive comparison of two competing models, for which optimal tests in the Neyman sense exist. The method yields a preferred model structure and its initial parameter estimates. Alternatively, the method can give a reduced set of likely models. Using simulated data we study how the selection method performs when there is both uncorrelated and correlated noise in the measurements. The first case is related to instrumentation noise, whereas the second case is related to spurious wave-induced motion often present during sea trials. We then consider the model structure selection of a modern high-speed trimaran ferry from full scale trial data. © 2010 IFAC.

关键词： Regression analysis

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A Low Power Routing and Topology control Protocol for Cluster-based Environmental Wireless Sensor Networks: The FLORA Project Case

A Low Power Routing and Topology Control Protocol for Cluste...

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

作者： F. Resquin J. Guevara C. Cardozo C. Santacruz F. Brunetti Department of Electronic and Informatics Engineering Sciences and Technology School Nuestra Señora de la Asunción Centro de Innovacion en Automatización y Control (CIAC-FPTI) Catholic University Paraguay Dept. of Electron. & Inf. Eng. Catholic Univ. Nuestra Senora de la Asuncion Asuncion Paraguay Bioengineering Group Consejo Superior de Investigaciones Científicas CSIC Madrid Spain

Environmental monitoring is one of the most classic applications of Wireless Sensor Networks (WSN). Itaipu hydroelectric dam creates a unique scenario for the develop ment of this type of WSN with more than 200 square kilometers of natural forests. In this context, FLORA project is aimed at developing a habitat monitoring WSN to be deployed in the Zoo of Itaipu and in the Tati Yupi Biological Refuge. The de ployment includes more that 50 nodes. The paper describes the two scenarios of this ambitious and challenging application and presents the routing and topology control protocol developed in the framework of FLORA. The protocol was designed to fulfil the requirements of the application, extend the lifetime of the network, and to adapt to continuous nodes deployment and potential failures. It is based in several protocols already reported in the literature. The novel proposal is a reliable and lightweight routing protocol for wireless sensor network based on vector distance, collection tree, and energy aware distance vector protocols. The main idea is that each node of the network finds the shortest path to the sink with the best link quality, in order to guarantee the delivery of data to the sink despite the dynamic and lossy nature of wireless transmissions. The functionality of this novel protocol is presented as well as the results based on a TinyOS implementation and traditional WSN nodes (motes) including a CC2420 radio.

关键词： Wireless sensor networks Protocols Topology Monitoring Temperature sensors Network topology Pins

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