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28,451 Article Results

The Detection of straight and Slant Wood Fiber Through slop angle fiber feature

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1481
Ratri Dwi Atmaja , Erwin Susanto , Junartho Halomoan , Gurnita Koncara Indraloka , Muhammad Ary Murti
Quality control is one of important process that can not be avoided in industry. Image processing technique is required to distinguish the quality of wood. If it can be done automatically by the computer, it will be very helpful. This paper discusses the detection of straight and slant wood fiber to distinguish it’s quality. This paper propose an algorithm by using only two features i.e. mean (average value of slop angle fiber) and maximumangle (the maximum value of slop angle fiber). Then the classification method is used by tresholding. The result shows the performance is achieved on accuracy 79.2%. DOI: http://dx.doi.org/10.11591/telkomnika.v14i2.7725
Volume: 14
Issue: 2
Page: 318-322
Publish at: 2015-05-01

Thermal Behavior of an Integrated Square Spiral Micro Coil

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1472
Y. Benhadda , A. Hamid , T. Lebey , A. Allaoui , M. Derkaoui , R. Melati
We present in this paper a study on the thermal behavior of a square micro coil that will be integrated in a DC-DC micro converter. The first, we calculate the value of inductance. The second, we descript our micro coil; dimensioning, electrical model, and formula of loss. A buck micro converter schematic simulation coupled with ideal and integrated micro coil was presented. This conceptual model of the buck is best understood in terms of the relation between current and voltage of the inductor. Finely, we determinate a mathematical expression giving the evolution of temperatures in an integrated micro coil using the separation of variables method and a visualization of the thermal behavior is determined in 2D and 3D space dimension using the finite element method. DOI: http://dx.doi.org/10.11591/telkomnika.v14i2.7361
Volume: 14
Issue: 2
Page: 250-265
Publish at: 2015-05-01

The Feasibility Study of Using Space Vector Modulation Inverters in Two-Level of Integrated Photovoltaic System

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1467
Mahmoud Zadehbagheri , Amin Payedar
In this paper a system of integrated photovoltaic converter with vector switching control inverter with the modulation method of spatial two-level has been presented. The structure of the system is presented with the proposed and the structure of the invertors’ voltage source has been reviewed. Space vector modulation control method of two-level in a voltage source inverter and then provide proposed system analysis and keying modes are analyzed and the system designing and with the simulation of MATLAB software and standards of the total harmonic distortion for a few modulation methods for comparison, and evaluation has been proposed. The system has been analyzed in terms of economic. A prototype for assessing and comparing with power of 360w in the output with DC link voltage is 400 V and the module voltage is 46.5v has an efficiency of 97.9% in its output that improved than SPWM of 1.6% and to the PWM of 2.7% and Has been simulated with MATLAB software and compared to with a few examples of the control systems of the sinusoidal pulse width modulation and pulse width modulation. Speed and Switching and performance of the system have been analyzed and methods to reduce switching losses and increase of the system efficiency in the practical examples are proposed. DOI: http://dx.doi.org/10.11591/telkomnika.v14i2.7414
Volume: 14
Issue: 2
Page: 205-214
Publish at: 2015-05-01

Temperature Control of Liquid Filled Tank System Using Advance State Feedback Controller

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1476
Kunal Chakraborty , Sankha Subhra Ghosh , Rahul Dev Basak , Indranil Roy
In this paper modeling of a temperature measuring tank system has been done and then a Advance state Feedback Controller have been used for controlling the step responses of the system. The proposed system extends to a three tank system and each tank has same amount of liquid. The results of computer simulation for the system with Advance state Feedback is shown. DOI: http://dx.doi.org/10.11591/telkomnika.v14i2.7644
Volume: 14
Issue: 2
Page: 288-292
Publish at: 2015-05-01

Estimation of Load Torque and Rotor Speed in Single-Phase Induction Motor Using EKF

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1471
Ali Monadi , Mohammad Jannati , Tole Sutikno , Nik Rumzi Nik Idris
This paper presents a novel method for estimation of load torque and rotor speed in single-phase Induction Motor (IM) with two asymmetrical windings by using Extended Kalman Filter (EKF). Normally, for estimation of load torque and rotor speed in IM, six state variables namely stator currents, rotor fluxes, rotor speed and load torque, are considered. This paper shows by considering five state variables, estimation of these parameters is possible. Simulation results show the good performance of the presented method. DOI: http://dx.doi.org/10.11591/telkomnika.v14i2.7592
Volume: 14
Issue: 2
Page: 241-249
Publish at: 2015-05-01

Active Infrared Night Vision System of Agricultural Vehicles

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1480
Haijun Yue , Haisheng Xin
Active infrared night vision system was significant for night driving and it has been greatly used on limousine car. Design active infrared night vision system for agricultural vehicles greatly improved the night vision of them and it was an inevitable trend. Comparing parameters of various night vision systems and designing active infrared night vision system of agricultural vehicles was significant for improving active security of agricultural vehicles working at nighttime. By analyzing the infrared night vision system basic parameters determined the structure form and basic parameters, calculated the infrared light wave width and emission power to choose each components, designed active infrared night vision system’s structure and determined parameters of agricultural vehicles. DOI:  http://dx.doi.org/10.11591/telkomnika.v14i2.7513 
Volume: 14
Issue: 2
Page: 311-317
Publish at: 2015-05-01

Data and Metadata Exchange Design with SDMX Format using Web Service for Interoperability Statistical Data

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1485
Jaka Sembiring , Ana Uluwiyah
Today’s concept of Open Government Data (OGD) for openness, transparency and ease of access of data owned by government agencies becomes increasingly important. This initiative emerges from the demand of data users for the data belongs to the government agencies. The data services providing an easy access, cheap, fast, and interoperability are needed by the users and becomes important indicator performance for respective government agencies. Statistical Data and Metadata Exchange (SDMX) is a new standard format in the data dissemination activities particularly in the exchange of statistical data and metadata via Internet. In this respect SDMX support the implementation of OGD project. This paper is on the technical design, development and implementation of data and metadata exchange service of statistical data using SDMX format to support interoperability data through web services. Three results are proposed: (i) framework for standardization of structure of statistical publications data model with SDMX; (ii) design architecture of data sharing model; and (iii) web service implementation of data and metadata exchange service using Service Oriented Analysis and Design (SOAD) method. Implementation at Statistics Indonesia (BPS) is chosen as a case study to prove the design concept. It is shown through quantitative assessment and black box testing that the design achieves its objective. DOI: http://dx.doi.org/10.11591/telkomnika.v14i2.7505
Volume: 14
Issue: 2
Page: 343-352
Publish at: 2015-05-01

The Knowledge Management System of a State Loss Settlement

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1484
Amalia Rahmawati , Irman Hermadi , Rein Suadamara
The knowledge management is a model involving the information system in the knowledge processing. Tim Penyelesaian Kerugian Negara (TPKN) is one of sources of information related to the state loss settlement, so it needs the development of knowledge management system on the state loss settlement to ease the users when looking for the references of knowledge as completely as possible, accurately, and quickly. This research aims to develop the system of knowledge management on the state loss in LAPAN (SIMAPKLA). The used research methodology is Knowledge Management System Life Cycle (KMSLC). The tacit, explicit knowledge is taken from the experts and it is stored in the Knowledge Base (KB). The design model uses the approach with the orientation of object and implementation with Yii Framework and blackbox testing. The menu on this system includes home, about us, dictionary, news, meeting schedulles, knowledge about state loss, e-document, progress, and forum. Based on a series of tests, in the aspect of functionality, this system is suitable and useful to share knowledge and know the development of state loss settlement. DOI:  http://dx.doi.org/10.11591/telkomnika.v14i2.7388 
Volume: 14
Issue: 2
Page: 335-342
Publish at: 2015-05-01

U-slot Circular Patch Antenna for WLAN Application

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1482
Arshad Wahab , Jiadong Xu
A dual-frequency microstrip patch antennas has been presented and used for 802.11WLAN applications. The antennas had been designed, simulated and parametrically studied in CST Microwave studio. By introducing u-slot, dual-band operation with its operating mode centered at frequency 2.4GHz, 3.65GHz and 5.2GHz had been obtained. The gain and directivity had been improved by adjusting the parameters of the antennas. The gain of the proposed designs was 6.019dBi, 4.04dBi and 6.22dBi and directivity was 6.02dBi, 4.05dBi and 6.22dBi at resonant frequencies 2.4GHz, 3.6GHz and 5.2GHz respectively. The patch antennas had been proposed to be used in portable devices that require miniaturized constituent parts. DOI: http://dx.doi.org/10.11591/telkomnika.v14i2.7479 
Volume: 14
Issue: 2
Page: 323-328
Publish at: 2015-05-01

Robot Three Dimensional Space Path-planning Applying the Improved Ant Colony Optimization

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1479
Ming Zhao , Dai Yong
To make robot avoid obstacles in 3D space, the Pheromone of Ant Colony Optimization（ACO）in Fuzzy Control Updating is put forward，the Pheromone Updating value varies with The number of iterations and the path-planning length by each ant . the improved Transition Probability Function is also proposed，which makes more sense for each ant choosing next feasible point .This paper firstly, describes the Robot Workspace Modeling and its path-planning basic method, which is followed by introducing the improved designing of the Transition Probability Function and the method of Pheromone Fuzzy Control Updating of ACO in detail. At the same time， the comparison of optimization between the pre-improved ACO and the improved ACO is made . The simulation result verifies that the improved ACO is feasible and available. DOI: http://dx.doi.org/10.11591/telkomnika.v14i2.7723 
Volume: 14
Issue: 2
Page: 304-310
Publish at: 2015-05-01

Electrical Properties of Indium doped Alumina (Al2O3) Thin Films

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1473
Hadaate Ullah , Shahin Mahmud
To know the electrical properties of any materials is very important for practical application of that material. In this paper I have tried to find out the proper electrical properties of Indium doped Alumina (Al2O3) for practical application of this Alumina. For this purpose all thin films are deposited on glass substrate by electron beam evaporation technique at a pressure of about 1.5 x 10-6 torr and at temperature of 307K. The thickness of Indium doped Al2O3 films (25%w, 30%w and 40% w of In2O3) range from 68 nm to 183 nm. For 25% In2O3 doped alumina the conductivity at room temperature is 24.10mho/cm, for 30% In2O3 doped alumina this value is 82.99mho/cm and for 40% In2O3 doped alumina this is 129.10mho/cm. The resistivity and sheet resistance decrease with the increase of doping concentration that means the conductivity increases with doping concentration. DOI: http://dx.doi.org/10.11591/telkomnika.v14i2.7747 
Volume: 14
Issue: 2
Page: 266-269
Publish at: 2015-05-01

A Minimax Polynomial Approximation Objective Function Approach for Optimal Design of Power System Stabilizer by Embedding Particle Swarm Optimization

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1465
Bhanu Pratap Soni , Akash Saxena , Vikas Gupta
The paper presents a novel approach based on Minimax approximation and evolutionary tool Particle Swarm Optimization (PSO) to fabricate the parameters of Power System Stabilizers (PSSs) for multi machine power systems. The proposed approach employs PSO algorithm for find the setting of PSS parameters. The worth mentioning feature of this work is the formulation of objective function with the help of swing curves interpolation. A novel transformation known as minimax approximation is used for converting the objective into the polynomials of degree one, two and three. To construct the objective function based on interpolation second order sensitivity analysis is performed. The performance of the PSSs is tested under different topological changes, operating conditions and system configurations. Nonlinear simulation reveals that proposed PSSs are effectively deal with local and interarea modes of oscillations. PSS design obtained through lower order polynomial expression of objective function is able to deal with the oscillatory modes efficiently. DOI: http://dx.doi.org/10.11591/telkomnika.v14i2.7602
Volume: 14
Issue: 2
Page: 191-198
Publish at: 2015-05-01

An Approach of PFC in BLDC Motor Drives Using BLSEPIC Converter

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1468
Murugan M , Jeyabharath R , Sarankumar V
This paper presents the analysis and design of on front end bridgeless single-ended primary-inductance converter (BLSEPIC) based power factor rectification, with output voltage regulation and high frequency isolation working in discontinuous conduction mode. The switching loss in VSI is minimized by an electronic commutation of Brushless DC motor (BLDCM) is used to operate in a low-frequency operation. To improve the efficiency, the diode bridge rectifier is replaced with the alternate bridgeless topologies which offers less conduction losses, advised by the international power quality standards, a wide range of speed control is obtained with improved power quality BLDC motor drive is proposed and simulated in MATLAB/SIMULINK. DOI: http://dx.doi.org/10.11591/telkomnika.v14i2.7404 
Volume: 14
Issue: 2
Page: 215-221
Publish at: 2015-05-01

New Bipolar Hybrid Carrier PWM Strategies for Symmetrical Multilevel Inverter

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1470
C.R. Balamurugan , S.P. Natarajan , R. Bensraj
In this paper, hybrid modulation methods suitable for H-bridge MLI are discussed. The results of experimental work using dSPACE system only are presented for three phase five level cascaded type inverter. Different hybrid carrier PWM (Pulse Width Modulation) strategies using sinusoidal reference, third harmonic injection reference, 60 degree reference and stepped wave reference for the chosen inverter are initially developed using SIMULINK. Strategies developed are then implemented in real time using dSPACE/RTI. The five level output voltages of the chosen MLI (MultiLevel Inverter) obtained using the dSPACE system based PWM strategies and the corresponding % THD (Total Harmonic Distortion) and VRMS (fundamental) are presented and analyzed. It is seen that sinusoidal reference with PS+VF (Phase shift+Variable Frequency) and PS+PD (Phase Disposition) provides output with relatively low distortion. APOD+CO (Alternative Phase Dispostion+Carrier Overlapping) and CO+PD PWM strategy is found to perform better since it provides relatively higher fundamental RMS output voltage and relatively lower stress on the devices. It is displayed that THI (Third Harmonic Injection) reference with PS+VF and CO+PS provides output with relatively low distortion. APOD+CO and CO+PS PWM strategy is found to perform better since it provides relatively higher fundamental RMS output voltage and relatively lower stress on the devices. It is observed that 60 degree reference with PD+VF provides output with relatively low distortion. CO+PD PWM strategy is found to perform better since it provides relatively higher fundamental RMS output voltage and relatively lower stress on the devices. It is noted that stepped wave reference with APOD+PD and PD+VF provides output with relatively low distortion. APOD+CO and CO+PD PWM strategy is found to perform better since it provides relatively higher fundamental RMS (Root Mean Square) output voltage and relatively lower stress on the devices. The simulation and hardware results closely match with each other. DOI: http://dx.doi.org/10.11591/telkomnika.v14i2.7362 
Volume: 14
Issue: 2
Page: 228-240
Publish at: 2015-05-01

Technology Content Analysis with Technometric Theory Approach to Improve Performance in Radiodiagnostic Installation

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1486
Bambang Guruh Irianto , Abdul Rahman , Herry Andayani
Installation Radiodiagnostic RSU Haji Surabaya facilitated some medical equipment for disease examinations  and have three  technology criteria: Examination by high technology equipment   (single-slice CT Scan), examination by intermediate equipment (General x-ray ≤ 300 mA / 125 KV) and examination by simple equipment  (Portable Dental x-ray ≤ 8 mA / 70 KV). When viewed in terms of revenue contribution to the Hospital, Radiodiagnostic Installation revenue from 2008 to 2012 has decreased continuously.  The aim of research for  measuring the contribution of each component technology: Tehnoware, Humanware, Inforware, and Orgaware on radiodiagnostic installation with the basic technometric theory approach  using indicator TCC (Technology Contribution Coefficien). The final results showed that a gap is almost evenly from the three technology components Humanware = 0519, Inforware = 0.538, orgaware = 0.534, but the gap is greatest in technology components Technoware = (0387, 0258, 0168), meaning that the strategy development units Radiodiagnostic  Installation prioritized to increase in aspect Technoware (rejuvenation medical equipment). DOI: http://dx.doi.org/10.11591/telkomnika.v14i2.7676
Volume: 14
Issue: 2
Page: 353-362
Publish at: 2015-05-01
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