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INDONESIA
Indonesian Journal of Electrical Engineering and Computer Science
Published by Institute of Advanced Engineering and Science
ISSN : 25024752     EISSN : 25024760     DOI : -
Core Subject :
Arjuna Subject : -
Articles 48 Documents
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Search results for , issue "Vol 12, No 12: December 2014" : 48 Documents clear
Guidelines to Establish Secure Structure in Communication Networks used in the Smart Grid Siamak Rezaei
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 12: December 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

Currently, an extensive worldwide movement to implement electrical Smart Grid and replacing traditional grids has been started. In the past, since each electrical grid was usually using its specific systems and protocols, the possibility of system penetration and consequently security concerns was in low levels. But in recent years, with implementation of electrical Smart Grid, using open standards and popular network protocols, such as the technology which is used in the Internet (Internet Protocol), in electrical Smart Grids has been considered. This is due to advantages like efficiency, accessibility and low cost of these technologies. But, on the other hand, this increases the security concerns. Thus, selecting the appropriate communication mechanism for Smart Grid, is one of the most important challenges. Therefore, in this paper we introduce and study traditional communication networks in Smart Grids and discuss security capabilities of them. http://dx.doi.org/10.11591/telkomnika.v12i12.6725 
Design of Fractional Order PID controller for dc motor using Genetic Algorithm Ashu Ahuja; Bhawna Tandon
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 12: December 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

Design of fractional order PID (FOPID) controller for DC motor is proposed in this paper. A FOPID (PIλDμ) is a PID controller whose derivative and integral orders are fractional numbers rather than integers. Design stage of such controller consists of determining six parameters – proportional constant (Kp), integral constant (Ki), derivative constant (Kd), filter time constant (τd), integral order (λ) and derivative order (μ). The proposed approach poses the problem as designing a DC motor speed controller on the concept of fixed structure robust controller and mixed sensitivity H∞ method. The uncertainty caused by the parameter changes of motor resistance, motor inductance and load are formulated as multiplicative uncertainty weight, which are used in the objective function in the design. Genetic Algorithm (GA) and Simulated Annealing (SA) are employed to carry out the aforementioned design procedure. Comparisons are made with a PID with derivative first order filter controller and it is shown that the proposed FOPID controller can highly improve the system robustness with respect to model uncertainties. The comparison of PID and FOPID controllers is also been done on the basis of Time Domain Performance index i.e. ISE (Integral of Square Error).  http://dx.doi.org/10.11591/telkomnika.v12i12.6470 
Accelerating Computation of DNA Multiple Sequence Alignment in Distributed Environment Ramdan Satra; Wisnu Ananta Kusuma; Heru Sukoco
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 12: December 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

Multiple sequence alignment (MSA) is a technique for finding similarity in many sequences. This technique is very important to support many Bioinformatics task such as identifying Single Nucleotide Polymorphism (SNP) and metagenome fragments binning. The simplest algorithm in MSA is Star Algorithm. The complexity of DNA multiple sequence alignment using dynamic programming technique is very high. This research aims to accelerate computation of Star Mutiple Sequence Alignment using Message Passing Interfaces (MPI). The performance of the proposed method was evaluated by calculating speedup. Experiment was conducted using 64 sequences of 800 bp Glycine-max-chromosome-9-BBI fragments yielded by randomly cut from reference sequence of Glycine-max-chromosome-9-BBI taken from NCBI (National Center for Biotechnology Information). The results showed that the proposed technique could obtain speedup three times using five computers when aligning 64 sequences of Glycine-max-chromosome-9-BBI fragments.  Moreover, the increasing of the number of computers would significantly increased speedup of the proposed. http://dx.doi.org/10.11591/telkomnika.v12i12.6572 
A Novel Technique for Vector Control of Single-Phase Induction Motors Based on Rotor Field-Oriented Control Mohammad Jannati; Sajad Abdollahzadeh Anbaran; Nik Rumzi Nik Idris; Mohd Junaidi Abdul Aziz
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 12: December 2014
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v12.i12.pp8104-8113

Abstract

Due to asymmetrical characteristics of single-phase IMs, conventional vector control methods for three-phase IMs cannot be directly applied to single-phase IMs. This study aims to improve performance of the single-phase IMs drive system. Hence, a novel control approach based on Rotor Field-Oriented control (RFOC) was developed for single-phase IMs. For this purpose, transformation matrices are applied to the machine equations. It is shown by applying these transformation matrices to the unbalanced equations of single-phase IM results in set of balanced equations with backward and forward components. Therefore, by some modifications in the conventional RFOC method for three-phase IM, vector control of single-phase IM can be done. The proposed method demonstrates reasonably good speed and torque responses with satisfactory tracking capability. It is shown the effect of using this supposition is reflected on the motor torque and hence speed oscillations. Due to good tracking capability of proposed drive system, this control technique can be a well-suited candidate for application where precise move of IM in required such as cutting, knurling and deformation processes.
Speech Enhancement Research based on Fractional Fourier transform Jingfang Wang
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 12: December 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

As many traditional de-noising methods fail in the intensive noises environment and are unadaptable in various noisy environments, a method of speech enhancement has been advanced based on dynamic Fractional Fourier Transform （FRFT）filtering. The acoustic signals are framed. The renewing methods are put in FRFT optimal disperse degree of noising speech and this method is implemented in detail. By TIMIT criterion voice and Noisex-92, the experimental results show that this algorithm can filter noise from voice availably and improve the performance of automatic speech recognition system significantly. It is proved to be robust under various noisy environments and Signal-to-Noise Ratio (SNR) conditions. This algorithm is of low computational complexity and briefness in realization. http://dx.doi.org/10.11591/telkomnika.v12i12.6694 
Improving the Dielectric Properties of High Density Polyethylene by Incorporating Clay-Nano Filler Osama Elsayed Gouda; Sohair F. Mahmoud; Ahmed A. El-Gendy; Ahmed S. Haiba
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 12: December 2014
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v12.i12.pp7987-7995

Abstract

Polymer Nano composites have been used for various important industrial applications. The preparation of high density polyethylene composed with Na-montmorillonite Nano filler using melt compounding method for different concentrations of clay-Nano filler of 0%, 2%, 6%, 10%, and 15% has been successfully done. The morphology of the obtained samples was optimized and characterized by scanning electron microscope showing the formation of the polymer Nano composites. The thermal stability and dielectric properties were measured for the prepared samples. Thermal gravimetric analysis results show that thermal stability in polymer Nano composites is more than that in the base polymer. It has been shown that the polymer Nano composites exhibit some very different dielectric characteristics when compared to the base polymer. The dielectric breakdown strength is enhanced by the addition of clay-Nano filler. The dielectric constant and dissipation factor have been studied in the frequency range 200 Hz to 2 MHz at room temperature indicating that enhancements have been occurred in dielectric constant and dissipation factor by the addition of clay-Nano filler in the polymer material when compared with the pure material.
Modelling of Faulty Three Phase Induction Motor by Field Orientation M. Jannati; N. R. N. Idris; M. J. A. Aziz
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 12: December 2014
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v12.i12.pp8069-8076

Abstract

This study investigates the simple vector control of a 3-phase squirrel cage Induction Motor (IM) under open-circuit fault (faulty 3-phase IM). It was shown that it is needed to supply the stator windings with unbalanced currents to remove the oscillating term of the machine electromagnetic torque. The vector control system is based upon Field-Oriented Control (FOC) that has been adapted for this type of machine. Simulation results are provided to show the operation of the proposed drive system.
CNC Parametric Optimization for Exercise Equipment Parts Surface Roughness Using TRIZ Han-Chen Huang; Cheng-I Hou; Tian-Syung Lan
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 12: December 2014
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v12.i12.pp8200-8204

Abstract

Product quality is the most important issue in the Computer Numerical Control (CNC) process. Hence, with exercise equipment parts Surface Roughness as the target, this study selected Spindle speed, Cutting depth, Feeding, and Tool runoff, as control parameters in CNC parametric optimization of target quality. By using the Theory of Inventive Problem Solving (TRIZ) to define the Cause and Effect relationship and conflicting points, this study quickly identified an optimal solution, according to TRIZ, and determined factor relevance by cutting control parameters. By the 40 Inventive Principles of TRIZ corresponding to Contradiction Matrix, we obtained the Surface Roughness optimization strategy. The empirical research results suggest that Surface Roughness can actually be improved under the optimal parameter combination. The effectiveness and practicality of the proposed method are verified.
Decision Support Dashboard in OpenERP Laila Eken; Belaid Bouikhalene; Mohamed Fakir
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 12: December 2014
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v12.i12.pp8326-8334

Abstract

This work focuses on the analysis and design of decision support dashboard in OpenERP. With the aim to improve the Operational Information System OIS of the Moroccan university, Hassan 1st University of SETTAT launched MISSION project, in association with 22 academic and institutional partners of Morocco and the European Union. This project is to improve the management of Moroccan universities. The vision of the MISSION project is to modernize the governance of universities in order to improve the quality of services offered by the university administration. The basic idea is to provide each partner university in a OIS using open source ERP (OpenERP) and integrating 4 bricks trades (schooling, Finance, Human Resource Management (HRM) and Heritage). This operational information system is not completed if and only if there is a Strategic Information System (SIS) that uses the information provided by the first to give university leaders the opportunity to take long-term decisions and this is the aim of the second. One of the tools of SIS we find dashboards.
Single Axis Automatic Solar Tracking System Using Microcontroller Soumya Das; Pradip Sadhu; Nitai Pal; Suprotim Mukherjee
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 12: December 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

Solar power generation had been employed as a renewable energy for years ago. Residents that uses solar power as their alternative power supply will bring benefits to them. The main objective of this paper is to develop a microcontroller-based solar panel tracking system which will keep the solar panels aligned with the Sun in order to maximize in harvesting solar power. When the intensity of light is decreasing, this system automatically changes its direction to get maximum intensity of light.Light dependent photo  resistors are used as the sensors of the solar tracker. For rotating the appropriate position of the panel, a steper motor is used. This design is covered for a single axis and is designed for residential use. Finally, the project is able to track and follow the Sun intensity in order to get maximum power at the output regardless motor speed. http://dx.doi.org/10.11591/telkomnika.v12i12.6742 

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