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Mediterranean Conference on control and Automation (MED)

作者： Oana Chenaru Dan Popescu Dragos Enache Societatea de Inginerie Sisteme SIS Bucharest Romania Faculty of Automatic Control and Computer Science Politehnica University Bucharest Romania

ISBN: (纸本)9781467383479

Risk evaluation and management are important stages in the design and maintenance of all industrial plants, especially in the oil and gas, power or nuclear fields. As current methods only address the design phase, the maintenance or the need of an emergency shutdown, our method provides a solution for a practical implementation of a fault management strategy that is able to detect abnormal process behavior, identify erroneous variable and react for the minimization of possible unwanted consequences.

关键词： Process control Fault diagnosis Real-time systems Industrial plants Fault detection Statistical analysis Decision trees

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Patient monitoring system based on e-health sensors and web services

Patient monitoring system based on e-health sensors and web ...

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International Conference on Electronics, computers and Artificial Intelligence (ECAI)

作者： Rasha Talal Hameed Omar Abdulwahabe Mohamad Omar Talal Hamid Nicolae Ţăpuş Faculty of Automatic Control and Computers University POLITEHNICA of Bucharest Bucharest Romania Department of Computer Science Cihan University Erbil Iraq

A lot of research has been carried out in the field of healthcare monitoring. In recent years, development of patient monitoring system has been emerged as an area of research. In this article, a patient monitoring system is proposed. The proposed framework integrated web services with multiple sensors controlled by Arduino Uno. Therefore, the Service Oriented Architecture (SOA) with Rich Internet Application (RIA) was used in this system. In particular, this system was applied on the four types of sensors necessary to monitor the patient such as electrocardiogram (ECG), body temperature, pulse rate and oxygen in blood (SPO2). Finally, the system outputs improves a high quality services, real time data collecting, eliminating manual data gathering and enabling the monitoring of huge numbers of patients.

关键词： Temperature sensors Electrocardiography Temperature measurement Monitoring Sensor systems Service-oriented architecture

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GPI-based secrecy rate maximization beamforming scheme for wireless transmission with an-aided directional modulation

arXiv

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arXiv 2017年

作者： Yu, Hai Wan, Simin Cai, Wenlong Xu, Ling Zhou, Xiaobo Wang, Jin Wu, Yongpeng Shu, Feng Wang, Jiangzhou Wang, Jianxin School of Electronic and Optical Engineering Nanjing University of Science and Technology Nanjing210094 China faculty of National Key Laboratory of Science and Technology on Aerospace Intelligence Control Beijing Aerospace Automatic Control Institute Beijing China Shanghai Key Laboratory of Navigation and Location-Based Services Shanghai Jiao Tong University Minhang200240 China College of Computer and Information Sciences Fujian Agriculture and Forestry University Fuzhou350002 China School of Engineering and Digital Arts University of Kent CanterburyCT2 7NT United Kingdom

In a directional modulation network, a general power iterative (GPI) based beamforming scheme is proposed to maximize the secrecy rate (SR), where there are two optimization variables required to be optimized. The first one is the useful precoding vector of transmitting confidential messages to the desired user while the second one is the artificial noise (AN) projection matrix of forcing more AN to eavesdroppers. In such a secure network, the paramount problem is how to design or optimize the two optimization variables by different criteria. To maximize the SR (Max-SR), an alternatively iterative structure (AIS) is established between the AN projection matrix and the precoding vector for confidential messages. To choose a good initial value of iteration process of GPI, the proposed Max-SR method can readily double its convergence speed compared to the random choice of initial value. With only four iterations, it may rapidly converge to its rate ceil. From simulation results, it follows that the SR performance of the proposed AIS of GPI-based Max-SR is much better than those of conventional leakage-based and null-space projection methods in the medium and large signal-to-noise ratio (SNR) regions, and its achievable SR performance gain gradually increases as SNR increases. Copyright © 2017, The Authors. All rights reserved.

关键词： Modulation

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On assignability of Lyapunov spectrum of discrete linear time-varying system with control

On assignability of Lyapunov spectrum of discrete linear tim...

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International Conference on Methods and Models in Automation and Robotics (MMAR)

作者： Artur Babiarz Irina Banshchikova Adam Czornik Evgenil Makarov Michał Niezabitowski Svetlana Popova Faculty of Automatic Control Electronics and Computer Science Institute of Automatic Control Gliwice Poland Department of Differential Equations Universitetskaya 1 Izhevsk Russia National Academy of Sciences of Belarus Institute of Mathematics Minsk Belarus

In this paper we study discrete linear time-varying system with control and bounded coefficients. For such systems we consider problems of the proportional global assignability and proportional local assignability of the Lyapunov spectrum of the discrete linear time-varying system with control. This is a generalization of the pole placement theorem, which is well-known in the theory of time-invariant system. The main results present sufficient conditions for considered types of assignability.

关键词： controllability Time-varying systems Feedback control Electronic mail Closed loop systems Mathematics

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Optimal distributed control for platooning via sparse coprime factorizations

Optimal distributed control for platooning via sparse coprim...

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2016 American control Conference, ACC 2016

作者： SabǍu, Şerban OarǍ, Cristian Warnick, Sean Jadbabaie, Ali Electrical and Computer Engineering Dept. Stevens Institute of Technology HobokenNJ United States Automatic Control Dept. University Politehnica Bucharest Romania Information and Decision Algorithms Laboratories Faculty of the Computer Science Department Brigham Young University United States Electrical and Systems Engineering Dept. University of Pennsylvania United States

ISBN: (纸本)9781467386821

We introduce a novel distributed control architecture for disturbances attenuation in heterogeneous platoons of linear and time-invariant autonomous agents that inherits the performance achievable by the leader-follower control policies. We provide a Youla-like parameterization for the class of all distributed controllers such that the sparsity constraints are imposed on the controllers' left coprime factors, outlining a new concept of structural constraints in distributed control. The proposed scheme lends itself to optimal controller design via norm based costs, it guarantees string stability and completely eliminates the accordion effect from the behavior of the platoon. The distributed controller is proven to attain global optimality for heterogeneous platoons and H2 costs and can easily reconfigure such as to remain optimal during formation merging/exiting maneuvers. The scheme is amenable to a GPS time base synchronization mechanism, allowing for the exact compensation of the time delays induced by the wireless communications. © 2016 American automatic control Council (AACC).

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On the behavior of Lyapunov exponents of discrete linear time-varying systems under exponentially decreasing perturbations of its coefficients

On the behavior of Lyapunov exponents of discrete linear tim...

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International Conference on Robotics and Automation Engineering (ICRAE)

作者： Evgenij Barabanov Aliaksei Vaidzelevich Adam Czornik Michal Niezabitowski Institute of Mathematics of National Academy of Sciences of Belarus Surganova 11 Minsk Belarus Faculty of Automatic Control Electronics and Computer Science Gliwice Poland

ISBN: (纸本)9781509040735

In the paper the influence of the exponential decreasing perturbations of the coefficients on the Lyapunov exponents of discrete linear time-varying system is studied. We present a general - analogical to Perron - example used to different types of dynamical systems. Construction of this example is used to proving the main theorem of this paper. Corollary 1 shows that the type of distribution of Lyapunov exponents of the equation under exponentially decreasing perturbations of its coefficients can be changed with any other.

关键词： Linear matrix inequalities Time-varying systems Electronic mail Automation Linear systems computer science

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On the influence of the exponentially decaying perturbations of matrices coefficients on the Lyapunov exponents of the discrete time-varying linear system

On the influence of the exponentially decaying perturbations...

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International Carpathian control Conference (ICCC)

作者： Evgenij Barabanov Aliaksei Vaidzelevich Adam Czornik Michał Niezabitowski Institute of Mathematics of National Academy of Sciences of Belarus Minsk Belarus Faculty of Automatic Control Electronics and Computer Science Silesian University of Technology Gliwice Poland

In the paper we examine the influence of parametric perturbations on the Lyapunov exponents of the linear discrete time-varying system. We show on an example that even the perturbations tend to zero exponentially they may change the values of Lyapunov exponents. However, the main result of the paper shows that if the perturbations tends to zero exponentially with sufficiently large exponent, then the Lyapunov exponents of the perturbed and unperturbed systems are the same.

关键词： Linear matrix inequalities Time-varying systems Linear systems Electronic mail Mathematical model computer science

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Design of a controller for stabilization of spherical robot's sideway oscillations

Design of a controller for stabilization of spherical robot'...

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International Conference on Methods and Models in Automation and Robotics (MMAR)

作者： Kacper Landa Adam Krzysztof Pilat Master's student at Automatic Control and Robotics AGH University of Science and Technology Cracow Poland Faculty of Electrical Engineering Automatics Computer Science and Biomedical Engineering Cracow Poland

In this study, the dynamics and control aspects of a spherical rolling robot's lateral motion are investigated. An approximate, simplified to a single plane, mathematical model is derived using Lagrange equations to check stability of the system. Utilizing the fusion of sensor data, a precise orientation measurement is achieved. Document focuses on a synthesis of a PID controller reducing sideway oscillations that occur in motion of a spherical robot with internal pendulum mechanism.

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Sparse vector autoregressive modeling of audio signals and its application to the elimination of impulsive disturbances

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IFAC-PapersOnLine 2015年第28期48卷 1208-1213页

作者： Maciej, Niedwiecki Marcin, Ciolek Faculty of Electronics Telecommunications and Computer Science Department of Automatic Control Gdask University of Technology ul Narutowicza 11/12 Gdask Poland

Archive audio files are often corrupted by impulsive disturbances, such as clicks, pops and record scratches. This paper presents a new method for elimination of impulsive disturbances from stereo audio signals. The proposed approach is based on a sparse vector autoregressive signal model, made up of two components: one taking care of short-term signal correlations, and the other one taking care of long-term correlations. The method is evaluated on a set of clean audio signals contaminated with real click waveforms extracted from silent parts of old gramophone recordings. © 2015

关键词： Vectors Phonograph records Autoregressive signals Impulsive disturbances ITS applications Long term correlations Signal correlation Sparse vectors Stereo audio signal Two component

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MTS2: Many task scheduling simulator 29

MTS2: Many task scheduling simulator

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29th European Conference on Modelling and Simulation, ECMS 2015

作者： Stratulat, Adrian Oncioiu, Raluca Pop, Florin Dobre, Ciprian Computer Science Department Faculty of Automatic Control and Computers University Politehnica of Bucharest Romania

ISBN: (纸本)9780993244001

The Many Task Computing paradigm was first introduced by loan Raicu and could be described shortly as solving a large number of tasks with short time executions (i.e. seconds to minutes long) that are data intensive. We propose MTS2: Many Task Scheduling Simulator that can be used for a broad range of simulations-after each simulation one can visualize the results. The purpose of MTS2 framework is to simulate events that happen inside a cluster in order to experimentally check or validate various classes of scheduling algorithms. Our event-based simulator provides the building blocks that can be used to implement mathematical models for simulations and it is designed to be extensible, fast and scalable. For the purpose of scheduling algorithm evaluation, the performance is critical: we will study the asymptotic behaviour of some scheduling algorithms under extreme conditions. We will show that MTS2 can be used in various scheduling algorithms and performs better than SimMatrix on a quad core machine, regarding the time per task: 7 microseconds compared to 100 microseconds for simulations with one node and less than 0.5 microseconds with MTS2 for simulations with more than 64 nodes. © ECMS Valen M. Mladenov, Petia Georgieva, Grisha Spasov, Galidiya Petrova (Editors).

关键词： Scheduling algorithms

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