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2012 2nd International Conference on Consumer Electronics, Communications and Networks, CECNet 2012

作者： Li, Tingshun Zhu, Weiying Xu, Jiaohui Cheng, Yongqiang Dept. School of Control and Computer Engineering NCEPU Beijing China

ISBN: (纸本)9781457714153

The analysis and implementation of UDP-based cross-platform data shows that the advantages of UDP protocol are better understood and it's the best places of application. Further, master the knowledge of data transmission and the operation to XML file. By parsing an XML document, which will extract the data stored, and then packaged in these data through the UDP protocol, send data to the receiving program, After the receiving program receives the data, the data in the package open, extract original data, and then use these data to generate relevant content of the XML file, in the end output. In addition, the article also reflects the advantage of Java language: cross-platform. © 2012 IEEE.

关键词： XML

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Robust LMI control of a buck-boost converter with low ripple propagation

Robust LMI control of a buck-boost converter with low ripple...

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2012 20th Mediterranean Conference on control and Automation, MED 2012

作者： Ingles, J.V. Garces, P. Leyva, R. Dept. of Electronic Electrical and Automatic Control Engineering Universitat Rovira i Virgili 43007 Tarragona Spain

ISBN: (纸本)9781467325318

This paper proposes a new robust control strategy to prevent the current ripple propagation into the dc-dc converter input, thus avoiding converter malfunctions. Concretely, we apply the new strategy to a buck-boost converter. The strategy is based on LMI control and use readily, fast convex optimization algorithms to obtain the solution. The control objective is maximizing the current disturbance rejection, where current ripple propagation and usual, prescribed dynamic performances are ensured. The paper describes the control design procedure, besides an illustrative example and simulation verifications. Simulation waveforms are in perfect agreement with objective function and performances constraints of the control design. That is, the current ripple propagation is almost zero and other prescribed constraints are satisfied. © 2012 IEEE.

关键词： Buck-Boost converter

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Characterization of Patients with Different Ventricular Ejection Fractions using Blood Pressure Signal Analysis

Characterization of Patients with Different Ventricular Ejec...

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Computing in Cardiology Conference

作者： Andres Arcentales Andreas Voss Pere Caminal Antonio Bayés-Genís M Teresa Domingo Beatriz F Giraldo Institut de Bioenginyeria de Catalunya (IBEC) Barcelona Spain Dept. of Medical Engineering and Biotechnology University of Applied Sciences Jena Germany Dept. of Automatic Control (ESAII) Universitat Politécnica de Catalunya Barcelona Spain Cardiology Service Hospital Universitari Germans Trias i Pujol Badalona Spain Cardiology Service Hospital de la Santa Creu i Sant Pau Barcelona Spain

ISBN: (纸本)9781479908851

Ischemic and dilated cardiomyopathy are associated with disorders of myocardium. Using the blood pressure (BP) signal and the values of the ventricular ejection fraction, we obtained parameters for stratifying cardiomyopathy patients as low- and high-risk. We studied 48 cardiomyopathy patients characterized by NYHA >2: 19 patients with dilated cardiomyopathy (DCM) and 29 patients with ischemic cardiomyopathy (ICM). The left ventricular ejection fraction (LVEF) percentage was used to classify patients in low risk (LR: LVEF > 35%, 17 patients) and high risk (HR: LVEF < 35%, 31 patients) groups. From the BP signal, we extracted the upward systolic slope (BP_(s1)), the difference between systolic and diastolic BP (BPA), and systolic time intervals (STI). When we compared the LR and HR groups in the time domain analysis, the best parameters were standard deviation (SD) of 1/STI, kurtosis (K) of BP_(sl) and K of BP A. In the frequency domain analysis, very low frequency (VLF) and high frequency (HF) bands showed statistically significant differences in comaprisons of LR and HR groups. The area under the curve of power spectral density was the best parameter in all classifications, and particularly in the very-low- and high-frequency bands (p < 0.001). These parameters could help to improve the risk stratification of cardiomyopathy patients.

关键词： BP DCM NYHA

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A method for solving inverse kinematics of PUMA560 manipulator based on PSO-RBF network

A method for solving inverse kinematics of PUMA560 manipulat...

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2012 8th International Conference on Natural Computation, ICNC 2012

作者： Li, Zhe Ming Li, Chun Gui Lv, Shao Jiao Dept. of Electronic Information and Control Engineering Guangxi University of Technology Liuzhou China Department of Computer Engineering Dept. of Electronic Information and Control Engineering Guangxi University of Technology Liuzhou China

ISBN: (纸本)9781457721311

This paper describes the use of particle swarm algorithm and k-nearest neighbor method to optimize the process of radial basis function (RBF) network and we use the Denavit-Hartenberg (DH) method to research PUMA560 robotics, the results of the forward kinematics is derived as the RBF network training samples. We use six identical RBF network of twelve-input, single output, to achieve a PUMA560 inverse kinematics calculation. Simulation results show that the results obtained with this method has high accuracy and fast convergence. © 2012 IEEE.

关键词： Radial basis function networks

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Estimating packet loss rate in the access through application-level measurements

Estimating packet loss rate in the access through applicatio...

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2nd ACM Workshop on Measurements Up and Down the Stack, W-MUST 2012

作者： Basso, Simone Meo, Michela Servetti, Antonio De Martin, Juan Carlos Nexa Center for Internet and Society Dept. of Control and Computer Engineering Politecnico di Torino Turin Italy Dept. of Electronics and Telecommunications Politecnico di Torino Turin Italy Dept. of Control and Computer Engineering Politecnico di Torino Turin Italy

ISBN: (纸本)9781450314763

End user monitoring of quality of experience is one of the necessary steps to achieve an effective and winning control over network neutrality. The involvement of the end user, however, requires the development of light and user-friendly tools that can be easily run at the application level with limited effort and network resources usage. In this paper, we propose a simple model to estimate packet loss rate perceived by a connection, by round trip time and TCP goodput samples collected at the application level. The model is derived from the well-known Mathis equation, which predicts the bandwidth of a steady-state TCP connection under random losses and delayed ACKs and it is evaluated in a testbed environment under a wide range of different conditions. Experiments are also run on real access networks. We plan to use the model to analyze the results collected by the "network neutrality bot" (Neubot), a research tool that performs application-level network-performance measurements. However, the methodology is easily portable and can be interesting for basically any user application that performs large downloads or uploads and requires to estimate access network quality and its variations. © 2012 ACM.

关键词： Quality control

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Correcting open-answer questionnaires through a Bayesian-network model of peer-based assessment

Correcting open-answer questionnaires through a Bayesian-net...

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2012 International Conference on Information Technology Based Higher Education and Training, ITHET 2012

作者： Sterbini, Andrea Temperini, Marco Dept. Computer Science. Sapienza University of Rome Rome Italy Dept. Computer Control and Management Engineering Sapienza University of Rome Rome Italy

ISBN: (纸本)9781467323345

We have previously shown that, with the help of peer-assessment and of a finite-domain constraint-based model of the student's decisions, the teacher could have a complete assessment of the answers to open-ended questions, by grading just a subset of the answers (as low as half of the lot) and having the rest of the grading inferred by the supporting system. In this paper we present a probabilistic version of the earlier model, using Bayesian networks instead than constraints. Our aims are both defining the approach and prepare its validation: 1) modeling the peer-assessment activity of a student that evaluates others' answers, 2) using peer-assessment to help the teacher with a faster/shorter assessment process, 3) inferring the student's level of competence and ability to judge, from peer-assessment and from (partial) teacher-assessment, 4) learning the conditional probabilistic tables (CPTs) of the model from student data, and 5) comparing the probability distribution of competences in the class at different course phases. The model is under development and test with real data. We are developing a web-based interface to deliver open-answer and peer-assessment questionnaires and to assist the teacher-assessment. © 2012 IEEE.

关键词： Bayesian networks

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A frequency limited model reduction technique for linear discrete systems

A frequency limited model reduction technique for linear dis...

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Australian control Conference (AUCC)

作者： Xin Du Ahmad Jazlan Victor Sreeram Roberto Togneri Abdul Ghafoor Shafishuhaza Sahlan School of Mechatronics Engineering and Automation Shanghai University Shanghai P. R. China Electronic and Computer Engineering University of Western Australia Western Australia WA Australia Department of Electrical Engineering National University of Sciences and Technology Rawalpindi Pakistan Control & Mechatronics Eng. Dept. (CMED) Universiti Teknologi Malaysia Skudai Johor Malaysia

This paper describes the model reduction framework for single-input single-output (SISO) discrete-time systems based on the preservation parameters such as Markov properties of the original system by applying a Frequency-Limited Impulse Response Gramian based Balanced Truncation method. This proposed method extends the Frequency-Limited Impulse Response Gramians model reduction method for continuous systems described in the recent paper in [20] to be applicable for discrete time systems. A numerical example is provided to compare the performances between various frequency limited model reduction methods at an arbitrarily selected frequency range within the passband of a digital filter. The stability of the reduced order models are also checked for each scenario.

关键词： Reduced order systems Observability controllability Matrix decomposition Time-frequency analysis Equations Mathematical model

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Aided navigation techniques for indoor and outdoor unmanned vehicles

Aided navigation techniques for indoor and outdoor unmanned ...

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2012 5th International Conference on New Technologies, Mobility and Security, NTMS 2012

作者： Tuna, Gurkan Gulez, Kayhan Dept. of Computer Programming Trakya University Edirne Turkey Dept. of Control and Automation Engineering Yildiz Technical University Istanbul Turkey

ISBN: (纸本)9781467302296

This paper presents design considerations of indoor and outdoor navigation techniques proposed for unmanned vehicles (UV). In this paper, we mainly investigate the use and the advantages of wireless sensor networks (WSNs) for indoor navigation, and Global Positioning System (GPS) for outdoor navigation. The system primarily uses laser range finder (LRF) measurements for indoor navigation, and is based on Extended Kalman Filter (EKF). For outdoor navigation the system uses Inertial Navigation System (INS) measurements. At periodical intervals the system integrates the measurements of an absolute sensor to improve estimations. The absolute sensor is a WSN interface for indoor navigation, and a GPS receiver for outdoor navigation. Simulation studies were conducted using Unified System for Automation and Robot Simulation (USARSim) and Player/Stage. The results of USARSim based simulations prove the advantages of integrating GPS measurements. Player/Stage based simulations show the advantages of integrating Received Signal Strength Indicator (RSSI) measurements obtained from WSN interfaces. In addition to the simulation studies, field tests with a custom-built Corobot autonomous robot platform will be realized to prove the effectiveness of the methods. © 2012 IEEE.

关键词： Wireless sensor networks

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Integrated Time-Optimal Trajectory Planning and control Design for Industrial Robot Manipulator

Integrated Time-Optimal Trajectory Planning and Control Desi...

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IEEE/RSJ International Conference on Intelligent Robots and Systems

作者： Stepan S. Pchelkin Anton S. Shiriaev Anders Robertsson Leonid B. Freidovich Department of Engineering Cybernetics Norwegian University of Science and Technology NO-7491 Trondheim Norway. Department of Applied Physics and Electronics Ume? University SE-901 87 Ume? Sweden. Dept. of Automatic Control Lund University SE-221 00 Lund Sweden and is member of the LCCC Linnaeus Center and the ELLIIT Excellence Center at Lund University.

ISBN: (纸本)9781467363563

We consider planning and implementation of fast motions for industrial manipulators constrained to a given geometric path. With such a problem formulation, which is quite reasonable for many standard operation scenarios, it is intuitively clear that a feedback controller should be designed to achieve orbital stabilization of a time-optimal trajectory instead asymptotic. We propose an algorithm to convert an asymptotically stabilizing controller into an orbitally stabilizing one and check achievable performance in simulations and, more importantly, in experiments performed on a standard industrial robot ABB IRB 140 with the IRC5-system extended with an open control interface. It is verified that the proposed re-design allows significantly reduced deviations of the actual trajectories from the desired one at high speeds not only for a chosen base feedback design but also outperforming the state-of-the-art commercial implementation offered by ABB Robotics.

关键词： Motion and trajectory planning with constraints Orbital stabilization Time optimal control Industrial manipulators

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A comparative study of digital IMC and RST regulators applied on a wind turbine

UPB Scientific Bulletin, Series C: Electrical Engineering

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UPB Scientific Bulletin, Series C: Electrical engineering 2012年第4期74卷 27-38页

作者： Pintea, Andreea Popescu, Dumitru Dept. of Automatic Control and Computer Science Politehnica University Bucharest Romania

This paper presents a comparative study of two well known regulation algorithms designed for a horizontal variable wind speed turbine functioning in the above rated wind speed regime. Typical control in this working regime uses pitch regulation to maintain constant the turbine's rotor speed while the generator toque is held constant. This will be also the approach chosen for this study. The goal of the paper is to demonstrate the efficiency of the two algorithms in controlling the electrical output power by means of applying them on a simplified model of a wind turbine. The obtained results will be analyzed and presented through a few simulations. Copyright © 2009 Universitatea Politehnica Bucuresti.

关键词： Wind turbines

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