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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 9,226 Documents
 301   302   303   304   305 
Dynamic Filtering Method for GPS Based on Multi-Scale Wen An; Youming Liu; Guowei Wang; Zhiyong Liu; Tingjun Li
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 1: January 2013
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Aiming at GPS dynamic filtering method, this paper uses the method of multi-scale analysis, combines the “current” statistical model of automotive carrier with multi-scale signal transformation which is based on statistical characteristic, establishes the new algorithm of multi-scale data fusion for GPS dynamic filter combining with normal Kalman filter algorithm, at last achieves the optimal fusion estimated value of the target states based on global information at the finest scale. When the above algorithm is used to GPS dynamic filter, the simulated results show that the proposed algorithm can effectively increase estimated precision of target states compared with the conventional KF. DOI: http://dx.doi.org/10.11591/telkomnika.v11i1.1918
Electrical Characterization of Commercial Power MOSFET Under Electron Radiation Wan Nurhasana binti Wan Ayub; Nurul Fadzlin Hasbullah; Abdul Wafi Rashid
Indonesian Journal of Electrical Engineering and Computer Science Vol 8, No 2: November 2017
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v8.i2.pp462-466

Abstract

This paper presents the threshold voltage shifts for both p-channel and n-channel commercial power MOSFET before and after electron irradiation. The experiment was done under the 3MeV energy of electron with dose level varies from 50KGy until 250KGy. The results were plotted and analyzed in terms of the shifted voltage characteristics. It is observed that after irradiation, both p-channel and n-channel MOSFET experiences negative threshold voltage shifts. For n-channel devices, this is due to the radiation-induced positive charges dominated in the oxide traps while for p-channel devices it is believed due to radiation-induced ionization damage.
Timing violation reduction in the FPGA prototyped design using failed path fixes and time borrowing techniques Salahuddin Savugathali; Muslim Mustapa; Mohammed Sharazel Razali; Fazrul Faiz Zakaria
Indonesian Journal of Electrical Engineering and Computer Science Vol 14, No 2: May 2019
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v14.i2.pp628-636

Abstract

A fascinating property of a latch-based design is that the combinational path delay is allowed to be longer than the clock cycle as it can borrow time from the shorter paths in the subsequent logic states. Time borrowing technique is a common method used to satisfy timing violation in an FPGA prototyped design. The purpose of this paper is to review the current methodology involved in SoC design prototyping using a Synopsys Protocompiler and HAPS-80 platform and propose an approach by fixing the failed path in a latch due to the gated clock conversion (GCC) process during the synthesis stage which could lead to the timing violation. Two techniques are applied in this paper namely time borrowing technique and our proposed technique, Failed Path Fixes to reduce the timing violation in the FPGA prototyped design. The result shows that the applied techniques are able to close the timing violation in the design with an average of 90% improvement.
Sizing verification of a 4kWp retrofitted grid-connected photovoltaic system: a case study in Shah Alam, Malaysia F.A.M. Shukor; H. Zainuddin; A. Manja; F. L. M. Khir
Indonesian Journal of Electrical Engineering and Computer Science Vol 17, No 2: February 2020
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v17.i2.pp654-661

Abstract

Electricity are commonly generated from several types of energy resources such as fossil and nuclear energy. However, due to emission of carbon dioxide from both sources, renewable energy is introduced to provide a clean and secure sustainable energy. One of the potential renewable energy application is Photovoltaic (PV) system; namely grid-connected photovoltaic (GCPV) system and stand-alone photovoltaic (SAPV) system. In this study, a mathematical approach of SEDA’s GCPV sizing model is implemented to size a 4kWp of a retrofitted GCPV system by the method claimed to be the best practice mathematical design model under tropical climate Malaysia.  The outcome of the sizing approach will then be evaluated with HelioScope software, one of commercial simulation tools available in current market.  The final result obtained from both methods shows that the final PV array configuration is 1 x 12 (parallel x series) which is in agreement to the actual installed system.
Compressed Sensing High-accuracy Detection for Electric Power Interharmonics Tiejun Cao; Jingfang Wang
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 9: September 2014
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v12.i9.pp6494-6501

Abstract

Interharmonics frequencies are not integer multiple of the fundamental frequency, and interharmonics amplitudes are far less than fundamental amplitude and harmonics amplitudes,  which mean high sensitivity to desynchronization problems, so it’s dificult to estimate interharmonics.  In this paper, a new method based on random sparse sampling and compressed sensing (CS) Bregman technique was proposed to estimate the interharmonics. The random sam pling has following advantages; alias-free、sampling frequency need not obey the Nyquist limit、and higher frequency resolution. So the random sampling can measure the signals which their frequencies component are close, and can implement the higher frequencies measurement with lower sampling frequency. However,the rangdom sampling exists the noise in spectrum analysis, so it’s difficult to estimate the low amplitude signals. Compressed sensing can work out this problem by designing observation matrix and with the sparsity reconstruction of the signal in the Fourier domain; in addition, the application of CS can estimate the amplitudes and phases of the signals exactly. The results ofexperiments show that the proposed method can estimate the interharmonics exactly,even if the interharmonics frequencies are close the fundam ental frequency and interharmonics amplitudes are far less than fundamental am plitude；and can measure high order interharmonics with lower sam pling frequency.
Digital Dental X-Ray Image Segmentation and Feature Extraction Abdolvahab Ehsani Rad; Mohd Shafry Mohd Rahim; Alireza Norouzi
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 6: June 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

The process of analysis of such images is important in order to improve quantify medical imaging systems. It is significant to analysis the dental x-ray images we need features of image. In this paper we present a method for segmentation and feature extraction of dental x-ray images. The proposed method has been implemented by using level-set method for segmentation after image enhancement and illustrate contour for teeth to complete the segmentation step. Furthermore, we extracted multiple features of dental x-ray images using texture statistics techniques by gray-level co-occurrence matrix. Extracted data can perform to obtain the teeth measurements for automatic dental systems such human identification or dental diagnosis systems. Preparatory experiments show the significance of the proposed method to extract teeth from an x-ray image. DOI: http://dx.doi.org/10.11591/telkomnika.v11i6.2655
Control Structure Design for Man-Function Humanoid Robot Yifeng Cui; Jun Ho Lee; Hee Jung Byun; Su Goog Shon
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 12: December 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

This paper presents a new humanoid robot control structure - Man-Function humanoid robot. The sensing devices worn on the human body, these devices will produce signals of joints’ change when people move. Computer of the control system receiving the signals and processing them, then issue control signals to the servos of the robot at the same time, control the robot’s behavior. For this reason, a control structure of human’s behavior to determine the robot’s behavior formed. The humanoid robot has 17 servos and two pressure sensors, the rotation of these servos’ steering gears lead to the robot’s behavior changes, and 12 servos corresponding to the human body sensing devices, other 5 servos used for the stability control of the robot combined with the pressure sensors. Based on this control structure, some pilot tests of the sensing device or servo have been done, the closed-loop position control mode has been chosen and the Kalman filter smoothing optimization method been used, the initial static walking control of the robot been realized. DOI: http://dx.doi.org/10.11591/telkomnika.v11i12.3891
FPGA Implementation of a Nakagami-m fading channel Simulator using Random Number Generator Santhosh Kumar B; K. Ayyappa Swamy
Indonesian Journal of Electrical Engineering and Computer Science Vol 4, No 1: October 2016
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v4.i1.pp133-140

Abstract

By realizing the concept of implementation of the radio propagation channels on simulators is the eminent intention of this work. Even though prototyping software simulators are effortless to design we prefer hardware simulators as they endeavors distinguishable quickness, compared to earlier. Prior to this work fading channels like Gaussian, Rayleigh and Rician fading channel simulators were executed on hard ware.(i.e. FPGA) The significant target  of this attempt is to implement Nakagami-m  fading channel on hardware as they preserved for  unsubstantial consideration. While differentiating with other fading channels  Nakagami-m fading channel acquires wide spread applications, as its capability of providing  appropriate fit for practical fading data, as this is flexible through its size parameter ‘m’, over which representation of signal fading conditions that vary  from serious to modest, to normal  fading or no fading is accomplished . The proposed hardware simulator can hatches complex Nakagami variates after it was implemented on XilinxSpartan-xc3s500e-4fg320 FPGA. This is operated at 50MHz.
Sustainable Environmental Economic Dispatch Optimization with Hybrid Metaheuristic Modification M. R. M. Ridzuan; E. E. Hassan; A. R. Abdullah; A. F. A. Kadir
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 1: July 2018
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v11.i1.pp161-168

Abstract

Today’s Economic Dispatch (ED) solutions are featured with environmental obligations. Hence, the significant objective functions contribute to cost minimization, lower emission and less total system losses. As an alternative, New Meta Heuristic Evolutionary Programming (NMEP) technique was proposed to optimize the individual ED problem categorized as Single Objective Environmental Economic Dispatch (SOEELD), developed from an integration of original Meta Heuristic Evolutionary Programming (Meta-EP) with Artificial Immune System (AIS) with new arrangement in the mutation and cloning processes. The comparative analysis was conducted between the original Meta-EP and classical method of Hadi Saadat to verify the performance of NMEP method. Each particular objective function identified the best possible outcomes through the NMEP method. The simulations were conducted using MATLAB programming which tested both standard IEEE 26 and 57 bus systems.
New reliable modifications of HPM and HAM Khawlah Hussain
Indonesian Journal of Electrical Engineering and Computer Science Vol 19, No 1: July 2020
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v19.i1.pp371-379

Abstract

In this article, a new modification of the homotopy perturbation method (HPM) and homotopy analysis method (HAM) is presented and applied to non-homogeneous fractional Volterra integro-differential equations with boundary conditions. A comparative study between the new modified homotopy perturbation method (MHPM) and the new modified homotopy analysis method (MHAM). Several illustrative examples are given to demonstrate the effectiveness and reliability of the methods.

Page 303 of 923 | Total Record : 9226

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