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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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Indoor robot localization by RSSI/IMU sensor fusion

Indoor robot localization by RSSI/IMU sensor fusion

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International Conference on electrical engineering/Electronics, Computer, Telecommunications and Information Technology, ECTI-CON

作者： Veerachai Malyavej Warapon Kumkeaw Manop Aorpimai Department of Control Instrumentation and Mechatronics Faculty of Engineering Mahanakorn University of Technology Bangkok Thailand The Electrical Engineering Graduate Program Faculty of Engineering Mahanakorn University of Technology Bangkok Thailand

Localization is the crucial problem for mobile robot navigation. For indoor mobile robot, since a global positioning system (GPS) is incapable, another promising technique to detect the position is the received signal strength indicator (RSSI) from wireless communication. To improve the precision and robustness of mobile unit localization, an inertial measurement unit (IMU) is normally used. In this report, we propose the algorithm for mobile robot localization based on sensor fusion between RSSI from wireless local area network (WLAN) and an IMU. The proposed fusion scheme is based on the extended Kalman filter (EKF). The experiment is conducted by using mobile unit equipped with low-cost IMU and a wireless communication module together with access points to evaluate the performance of our algorithm, and the result is promising.

关键词： Robot sensing systems Noise Mobile communication Wireless communication Mathematical model Sensor fusion Kalman filters

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States and parameters estimation in induction motor using Bayesian techniques

States and parameters estimation in induction motor using Ba...

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IEEE SSD International Multi-Conference on Systems, Signals and Devices

作者： Majdi Mansouri Mostefa Mohamed-Seghir Hazem Nounou Mohamed Nounou Haitham Abu-Rub Electrical Engineering Department Qatar University Doha Qatar Faculty of Electrical Engineering Gdynia Maritime University Poland Chemical Engineering Program Texas A and M University at Qatar Doha Qatar

ISBN: (纸本)9781467364591

This paper addresses the problem of rotor speed, flux and parameters estimation of induction motor on the basis of a three-order electrical model. Thus, we propose to use a particle filtering (PF) to estimate states and parameters for an induction motor. It is assumed that only the voltages stator currents are measurable. In addition, the rotor resistance and magnetizing inductance, which vary with the motor temperature and magnetization level, can also be estimated within the same framework. Hence, the objective of this work is to estimate three states (the rotor speed, the rotor flux, and the stator flux) and two parameters (the rotor resistance and the magnetizing inductance). Simulation analysis demonstrates that the Bayesian algorithm can well estimate the states/parameters under disturbs of the noise, and it provides efficient accuracies for the states estimation. In addition, detailed case studies show that Bayesian algorithm has advantages over Unscented Kalman filter (UKF) for highly nonlinear estimation problems. Evaluation of the methods was performed by using Root Mean Square Error.

关键词： Magnetic separation Magnetic flux Stators Estimation Monte Carlo methods Rotors Vectors

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Ultra wideband microstrip antenna using T-shaped stub fed by coplanar waveguide

Ultra wideband microstrip antenna using T-shaped stub fed by...

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International Conference on QiR (Quality in Research)

作者： Rastanto Hadinegoro Indra Surjati Yuli Kurnia Ningsih Graduate Program Department of Electrical Engineering Faculty of Industrial Technology Trisakti University Jakarta Indonesia

A novel design for ultra wideband microstrip antenna using T-shape stub fed by coplanar waveguide is proposed and experimentally studied. The multiband frequencies can be reached by controlling the length of a and b of the T shaped stub. The results shown that the proposed antenna can be achieved multiband frequencies with return loss -21.5 dB at frequency 2.65GHz, return loss -24.5dB at frequency 5GHz, and return loss -35dB at frequency 8.42GHz. Impedance bandwidth of the proposed antenna is 6570 MHz or about 200% (VSWR

关键词： Microstrip antennas Antenna radiation patterns Ultra wideband antennas Coplanar waveguides Bandwidth Slot antennas

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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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IEEE International Symposium on Parallel and Distributed Processing Workshops and phd Forum (IPDPSW)

作者： Sérgio Cruz Daniel M. Muñoz Milton E. Conde Carlos H. Llanos Geovany A. Borges Department of Mechanical Engineering Faculty of Gama Electronics Engineering Graduate Program Department of Electrical Engineering University of Brasilia Brasília D.F Brazil

关键词： Field programmable gate arrays Hardware Kalman filters Robot sensing systems Sensor fusion

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Estimation of nonlinear control parameters in induction machine using particle filtering

Estimation of nonlinear control parameters in induction mach...

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IEEE SSD International Multi-Conference on Systems, Signals and Devices

作者： Majdi Mansouri Mostefa Mohamed-Seghir Hazem Nounou Mohamed Nounou Haitham Abu-Rub Electrical Engineering Department Qatar University Doha Qatar Faculty of Marine Electrical Engineering Gdynia Maritime University Gdynia Poland Chemical Engineering Program Texas A and M University at Qatar Doha Qatar

ISBN: (纸本)9781467364591

In this paper, particle filtering (PF) is addressed for both estimation and control to be integrated into a unified closed-loop or feedback control system that is applicable for a general family of nonlinear control structures. In the current work, the state variables (the rotor speed, the rotor flux, and the stator flux) as well as the model parameters are simultaneously estimated from noisy measurements of these variables, and the estimation technique is evaluated by computing the estimation root mean square error (RMSE) with respect to the noise-free data. In this case, in addition to comparing the performances of the estimation, the effect of the number of estimated model parameters on the accuracy and convergence of this technique is also assessed. Simulation analysis demonstrates that the particle filter can well estimate the states/parameters under disturbs of the noise, and it provides efficient accuracies for the states estimation.

关键词： Estimation Computational modeling Rotors Noise measurement Feedback control Stators Process control

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Study of the Effects Related to the Electric Reverse Stress Currents on the Mono-Si Solar Cell electrical Parameters

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Energy Procedia 2013年 36卷 104-113页

作者： K Al Abdullah Faisal Al Alloush Ali Jaafar C. Salame Laboratory of microelectronic-University of Aleppo Faculty of Electrical and electronic Engineering-Aleppo-Syria Postgraduate Student (PhD) University of Aleppo Faculty of Electrical and electronic Engineering-Aleppo-Syria Postgraduate Student (PhD) CNRSL National Council for Scientific Research Beirut Lebanon-LPA Faculty of Sciences II Lebanese University B.P 90656 Jdeidet El Mten Lebanon CNRSL National Council for Scientific Research Beirut Lebanon-LPA Faculty of Sciences II Lebanese University B.P 90656 Jdeidet El Mten Lebanon

The main objective of this work is to study, characterize finely the defects created in photovoltaic cells made from mono crystalline silicon wafer based on semiconductor has continued its operation under extreme conditions (electrical stress). We will demonstrate the effect of reverse stress current injected in solar cell structure on the I-V and C-V characteristics under dark conditions at room temperature for several time periods. These experimental measurements were numerical analyzed using double exponential model. Experimental evidence showed that different levels of reverse currents are confirmed to be a major degrading factor affecting the performance, efficiency, and power of solar modules. The experimental results were consistent with computational predictions.

关键词： Solar cell module Partial shading C–V characteristic Stress currents double exponential model.

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