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检索条件"机构=Electrical Engineering PhD Program of the Faculty of Engineering"

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Dynamic Surface for Output Feedback Sliding Modes, the Case of Relative Degree Two

Dynamic Surface for Output Feedback Sliding Modes, the Case ...

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IEEE Annual Conference on Decision and Control

作者： Andrea Aparicio Martinez Fernando Castanos Leonid Fridman Electrical Engineering PhD Program of the Faculty of Engineering Universidad Nacional Autonoma de Mexico Departamento de Control Automatico Cinvestav IPN Mexico Faculty of Engineering Universidad Nacional Autonoma de Mexico

ISBN: (纸本)9781467357159

A general transformation that takes linear systems into their regular form, for any relative degree is introduced. A sliding surface where unmatched unknown inputs are attenuated via a reduced order H_∞ control is designed, for the case of relative degree two. By a discontinuous control action, the surface is reached exactly in finite time, guaranteeing the minimization of the unmatched disturbance. Complete state measurements are not necessary.

关键词： INCOMPATIBLE Linear system Output feedback Standing Orders Family Members control action discontinuous control Slip surfaces Reduced order

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Performance of BitTorrent-Like P2P File Sharing Systems inspired by ALTO

Performance of BitTorrent-Like P2P File Sharing Systems insp...

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IEEE Region 10 International Conference TENCON

作者： Nattee Pinthong Woraphon Lilakiatsakun The Electrical Engineering Graduate Program Faculty of Engineering Mahanakorn University of Technology Thailand

The Peer-to-Peer (P2P) file sharing system, most notably BitTorrent (BT), have achieved tremendous success among Internet users. Recent studies suggest that the long-term relationships among BitTorrent peers can be explored to enhance the downloading performance. In such systems, The mechanisms like tit-for-tat, optimistic unchoking, anti-snubbing, various piece and selection strategy have been working very well. We design a new scheme to improve the performance of BitTorrent-Like P2P File Sharing Systems, inspired by the idea of Application Level Traffic Optimization (ALTO). This work is an attempt to study the performance of BitTorrent protocol and its networking infrastructure through two strategies, (A) we propose a novel approach to make BitTorrent node aware of the topology of underlying networks. Then we modify BitTorrent's original algorithms and replace them with new localized algorithms based on autonomous system (AS) hops. (B) we conduct comprehensive experiments to verify the correctness and effectiveness of our scheme based on the PeerSim simulation. The simulation result shows that, with our scheme, nodes in BitTorrent-like systems have better sense of the topology of their underlying networks, and can interact more efficiently. Besides, our scheme can help to decrease the traffic, optimize traffic distribution across the whole networks, and obtained are used to infer various performance parameters of BitTorrent protocols.

关键词： Peer-to-peer computing Topology Network topology Protocols Bandwidth Internet IP networks

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Adaptive Neural Networks for Nonlinear Dynamic Systems Identification

Adaptive Neural Networks for Nonlinear Dynamic Systems Ident...

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International Conference on Computational Intelligence, Modelling and Simulation (CSSIM)

作者： Erwin Sitompul Faculty of Engineering President University Bekasi Study Program Electrical Engineering Indonesia

A new scheme for adaptive neural networks for nonlinear dynamic system identification is proposed in this paper. The network of structure multi-layer perceptron with external recurrence is trained offline at first to get the initial network parameters. The parameters of the network are classified into short-term memory part and long-term memory part. The short-term memory part includes the parameters which are linear to the network output. In the implementation, the network is validated in each sampling time using a set of new measurement data. Training procedure will be executed if the model error exceeds a specified value and the short-term memory part will be adjusted. The application in modelling of room thermal behaviour demonstrates the performance of the proposed scheme.

关键词： Atmospheric modeling Temperature measurement Actuators Temperature sensors Data models Neural networks Neurons

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Linear-quadratic cost function for dynamic system modelling using recurrent neural networks

Linear-quadratic cost function for dynamic system modelling ...

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International Conference on Computer, Control, Informatics and Its Applications (IC3INA)

作者： Erwin Sitompul Study Program Electrical Engineering Faculty of Engineering President University Bekasi Indonesia

A new idea to improve the performance of neural networks in modelling is presented in this paper. As the networks obtain their knowledge through learning process, it can be influenced through stronger optimization or more suited cost function to be minimized. In this paper, the implementation of linear-quadratic cost function is proposed. This cost function comprises of quadratic and linear function. By applying the linear function to errors greater than a certain threshold, the network becomes more rigid and less sensitive to measurement outliers and disturbances in the form of impulses or spikes. Simulative experiment using a strongly non-linear dynamic system was conducted and the proposed cost function is proved to be effective and enables the network to cope with measurement data with disturbance impulses.

关键词： Cost function Neurons Biological neural networks Data models Mathematical model Jacobian matrices

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Interned based experimental tools for voltage source inverters

Interned based experimental tools for voltage source inverte...

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2013 4th International Conference on Power engineering, Energy and electrical Drives, POWERENG 2013

作者： Demirbas, Sevki Mutlu, Gurkan Electrical-Electronic Engineering Gazi University Technology Faculty Ankara Turkey Electronic Technologies Program Namik Kemal Uni. Corlu Vocational School Tekirdag Turkey

ISBN: (纸本)9781467363921

This study implements a virtual laboratory for half bridge, full bridge and three phase voltage source inverters (VSI). Users can connected to the system from any computer having internet connection and perform any experiment by using designed user interface. Simulation models have been constructed with MatLAB/Simulink software while user interfaces have been arranged with LabVIEW software. The connection between these two software has been provided by Simulation Interface Toolkit (SIT) as uninterruptible and bidirectional. Implemented system can be used as a useful education tool for learning VSI subject. © 2013 IEEE.

关键词： Simulink

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A reconfigurable ray-tracing Multi-Processor SoC with hardware replication-aware instruction set extension

A reconfigurable ray-tracing Multi-Processor SoC with hardwa...

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13th International Conference on Algorithms and Architectures for Parallel Processing, ICA3PP 2013

作者： Nery, Alexandre S. Nedjah, Nadia França, Felipe M.G. Jozwiak, Lech Corporaal, Henk LAM - Computer Architecture and Microeletronics Laboratory Systems Engineering and Computer Science Program COPPE Federal University of Rio de Janeiro Brazil Department of Electronics Engineering and Telecommunications Faculty of Engineering State University of Rio de Janeiro Brazil Department of Electrical Engineering - Electronic Systems Eindhoven University of Technology Netherlands

ISBN: (纸本)9783319038582

Application code and processor parallelization, together with instruction set customization, are the most common and effective ways to enhance the performance and efficiency of application-specific processors (ASIPs). Both the effective code parallelization and data/task parallelism exploitation, as well as effective instruction set customization, enable an ASIP to achieve a significant performance improvement using limited extra hardware resources. However, a naive parallelization or instruction set customization may not result in the required performance improvement, leading to a waste of computing and energy resources. Therefore, when performing parallelization or custom instruction selection, complex tradeoffs between processing speed, circuit area and power consumption must be closely observed. In this paper, we propose and discuss an efficient ASIP-based Multi-Processor System-on-a-Chip (MPSoC) design for ray-tracing, exploiting application parallelism and hardware replication-aware instruction set customization. Without hardware sharing among the custom instructions units, the proposed parallel ray-tracer MPSoC design with custom instructions achieves 77% speed up in comparison to a single microprocessor design with the default instruction set. However, with the replication-aware instruction set customization, the speed up increases to 81%. © Springer International Publishing Switzerland 2013.

关键词： Integrated circuit design

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Vulnerability and economic considerations in designing network topology

Vulnerability and economic considerations in designing netwo...

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International Conference on QiR (Quality in Research)

作者： Antonius Suhartomo Study Program of Electrical Engineering Faculty of Engineering President University - Kota Jababeka Bekasi Indonesia

Technological developments change the way of life of all people in interacting with each other, regardless of distance and time. One such interaction is the activity of the exchange of information through communication networks, which are either one-way or two-way with a variety of information, such as voices, images, and data, with the desire to have a fast and reliable delivery. If G(V, E) represents a graph or a network with a number of nodes, V = n, and the number of links, E = e, then assume the nodes are reliable and the links can fail. We investigate new parameter of connectivity called “k-component order edge-connectivity” or “component order edge-connectivity”, denoted by λ (k)c , in which within each type of topology is then compared such as in the topology of path, cycle, star, complete, and wheel networks, then choose the best selection in vulnerability and economic point of views.

关键词： Communication networks Network topology Wheels Investment Topology Reliability Economics

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On the performance of Amplify-and-Forward OFDM relaying with subcarrier mapping in Nakagami-m fading channels

On the performance of Amplify-and-Forward OFDM relaying with...

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2013 International Conference on Computing, Management and Telecommunications, ComManTel 2013

作者： Al-Qahtani, Fawaz S. Ha, Dac-Binh Nguyen, Tuong-Duy Alnuweiri, Hussein Electrical and Computer Engineering Program Texas AandM University at Qatar Doha Qatar Research and Development Center for Science and Technology Duy Tan University Danang Viet Nam Faculty of Airline Electronics and Telecommunications Engineering Vietnam Aviation Academy Viet Nam

ISBN: (纸本)9781467320870

In orthogonal frequency division multiplexing (OFDM) relay system, subcarrier mapping at the relay has been shown to substantially improve the performance evidently. In this paper, we investigate the performance analysis of dual-hop OFDM relay systems with subcarrier mapping over Nakagami-m fading channels. A closed-form expression of outage probabilty is derived for Amplify-and-Forward OFDM Relay System with subcarrier mapping. The efficiency of the analytical performance is demonstrated through simulation results. © 2013 IEEE.

关键词： Orthogonal frequency division multiplexing

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A portable and low cost solution for EMG using ZigBee, GPRS and Internet to Biomedical applications

A portable and low cost solution for EMG using ZigBee, GPRS ...

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19th IMEKO TC4 Symposium - Measurements of electrical Quantities 2013 and 17th International Workshop on ADC and DAC Modelling and Testing

作者： Silva, D.K.N. Sato, R.M.V. Castro, A.L.S. Electrical Engineering Post Graduate Program Av. Augusto Correa 01 66075-110 Belém - Pará Brazil Faculty of Computer and Telecommunication Engineering Av. Augusto Correa 01 66075-110 Belém - Pará Brazil

ISBN: (纸本)9781629931890

This paper presents a prototype of an acquisition board of electromyographic signals (EMG);an embedded portable, wireless and low cost solution. The system is composed of an EMG acquisition board, Zigbee modules and a device named GPRSx. After acquiring the EMG signal, it is sent through ZigBee wireless technology to GPRSx device. The GPRSx device sends the EMG signal to a server on the Internet by using GPRS wireless technology. Thus, the EMG signal is displayed in a graph on a remote computer. The results are very promising and may serve as a reference in studies for the biomedical area.

关键词： Costs

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A hardware approach for solving the robot localization problem using a sequential EKF

A hardware approach for solving the robot localization probl...

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2013 IEEE 37th Annual Computer Software and Applications Conference, COMPSAC 2013

作者： Cruz, Sergio Munoz, Daniel M. Conde, Milton E. Llanos, Carlos H. Borges, Geovany A. Department of Mechanical Engineering Braśýlia D.F. 70910-900 Brazil Electronics Engineering Graduate Program Faculty of Gama Braśýlia D.F. 70910-900 Brazil Department of Electrical Engineering University of Brasilia Braśýlia D.F. 70910-900 Brazil

ISBN: (纸本)9780769549798

This work describes a hardware architecture for implementing a sequential approach of the Extended Kalman Filter (EKF) that is suitable for mobile robotics tasks, such as self-localization, mapping and navigation problems. As such algorithm is computationally intensive, commonly it is implemented in PC-based platforms to be employed on larger robots. In order to allow the development of small robotic platforms, as those required in many current state of the art research (for instance micro robotics area), small size, low-power and high precision computation capabilities are required. This work proposes a hardware architecture for self-localization task, allowing the fusion of data coming from different sensors such as ultrasonic and laser rangefinder. The architecture is based on a single precision floating-point arithmetic, allowing the operations to be computed with large precision and dynamic range. The system has been adapted for achieving a reconfigurable platform, suitable for research tasks, and applied to a Pioneer 3AT mobile robot platform from Mobile Robots Inc. In order to compare the performance of the system, the same localization technique has been implemented in a high-end PC, as well as using an embedded microprocessor Nios II from Alter a Inc. In this paper several metrics have been used to evaluate system performance and suitability, measuring FPGA resources consumption and performance. Finally, the suitability of reconfigurable devices for such kind of applications has been verified and also discussed. © 2013 IEEE.

关键词： Extended Kalman filters

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