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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 :
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Articles 80 Documents
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Search results for , issue "Vol 11, No 4: April 2013" : 80 Documents clear
The K-Medoids Clustering Algorithm with Membrane Computing Yuzhen Zhao; Xiyu Liu; Hua Zhang
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 4: April 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

The K-medoids clustering algorithm is realized by a P system in this paper. Because the membrane system has great parallelism and lower computational time complexity, it is suitable for solving combinatorial problems like the clustering problem. A P system with all the rules to solve the K-medoids algorithm was constructed. The specific P system is associated with the dissimilarity matrix between n objects. This system can get one possible classifications in a non-deterministic way. Through example test, it is appropriate for cluster analysis. This is a new attempt in applications of membrane system and it provides new ideas and methods for cluster analysis. DOI: http://dx.doi.org/10.11591/telkomnika.v11i4.2383
A New Approach of Error Compensation on NC Machining Based on Memetic Computation Huanglin Zeng; Yong Sun; Xiaohui Zeng
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 4: April 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

This paper is a study of the application of Memetic computation integrating and coordinating intelligence algorithms to solve the problems of error compensation for a high-precision numeral control machining system. The primary focus is on development of integrated intelligent computation approach to set up an error compensation system of a numeral control machine tool based on a dynamic feedback neural network. Optimization of error measurement points of a numeral control machine tool is realized by way of application of error variable attribute reduction on rough set theory. A principal component analysis is used for data compression and feature extraction to reduce the input dimension of a dynamic feedback neural network. A dynamic feedback neural network is trained on ant colony algorithm so that network can converge to get a global optimum. Positioning error caused in thermal deformation compensation capabilities were tested using industry standard equipment and procedures. The results obtained shows that this approach can effectively improve compensation precision and real time of error compensation on machine tools. DOI: http://dx.doi.org/10.11591/telkomnika.v11i4.2399
Velocity Perception: Collision Handling Technique for Agent Avoidance Behavior Nazreen Abdullasim; Ahmad Hoirul Basori; Md Sah Hj Salam; Abdullah Bade
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 4: April 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

Collision avoidance behavior is always about maintaining free collision between virtual objects. It is also about generating evasion routing for the agents in virtual environment such as in crowd simulation. It consists of three processes which are construction of Field of Vision, Collision handling and collision response. Constructing field of vision is always a daunting task and always in enigma for the designer because it is subjected towards agent’s perception which is varies to each of them. There are few attempts on designing field of vision based on the agent’s dynamic focus toward its surrounding. Therefore, we present a top down approach study from crowd simulation modeling until the collision handling level in order to identify the suitable crowd modeling for our approach. Hence, at the end of this paper we will be able to discuss the possible techniques for constructing agent’s field of vision and analyze its potential in crowd simulation environment. DOI: http://dx.doi.org/10.11591/telkomnika.v11i4.2599
Wavelength Demultiplexer using Heterostructure Ring Resonators in Triangular Photonic Crystals Mohammad Reza Rakhshani; Moahmmad Ali Mansouri-Birjandi
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 4: April 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

In this Paper a new type of wavelength demultiplexer using ring resonators in 2D triangular photonic crystal is presented. The designed demultiplexer contents two regions which each own a resonator. Two dielectric constants are used in this demultiplexer. These structures which are called hetero have the capability to be used in wavelength division multiplexing (WDM) systems. The average transferred power for the two output channels is about 93%. The crosstalk between output channels was more than -18.5dB, also the overall size of the structure was about 144µm2 which is so appropriate for fabrication and integration. DOI: http://dx.doi.org/10.11591/telkomnika.v11i4.2331
Estimation Normal Vector of Triangular Mesh Vertex by Angle and Centroid Weights and its Application Yueping Chen; Jian Gao; Hao Wen; Xin Chen
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 4: April 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

To compute vertex normal of triangular meshes more accurately, this paper presents an improved algorithm based on angle and centroid weights. Firstly, four representational algorithms are analyzed by comparing their weighting characteristics such as angles, areas and centroids. The drawbacks of each algorithm are discussed. Following that, an improved algorithm is put forward based on angle and centroid weights. Finally, by taking the deviation angle between the nominal normal vector and the estimated one as the error evaluation standard factor, the triangular mesh models of spheres, ellipsoids, paraboloids and cylinders are used to analyze the performance of all these estimation algorithms. The machining and inspection operations of one mould part are conducted to verify the improved algorithm. Experimental results demonstrate that the algorithm is effective. DOI: http://dx.doi.org/10.11591/telkomnika.v11i4.2340
Vibration Error Research of Fiber Optic Gyroscope in Engineering Surveying Zhang Zhuomin; Hu Wenbin; Liu Fang; Gan Weibing; Yang Yan
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 4: April 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

In the process of the engineering surveying by FOG (fiber optic gyroscope), there are a lot of measurement error caused by many kinds of factors, vibration error is one of them. Analyzing the output signal of FOG on the effect of vibration, Kalman filter can be used to inhibit the drift of output signal, and it is experimentally validated based on the filtering algorithm. The results show that, the vibration error of FOG was reduced, and the validity of the method has been proved. DOI: http://dx.doi.org/10.11591/telkomnika.v11i4.2367
The Application of NTAUTO in the 1000MW Ultra-supercritical Units BAO Zhen; ZOU AI Hong; HUANG Huanpao; QIU Zhongchang; XIA Ming; PAN Gang
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 4: April 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

NTAUTO is an auto-configuration software, which is developed by department of technology of Beijing GuoDianZhiShen Control Technology Co., Ltd.,. The configuration software has been applied in the configuration of 1000MW ultra-supercritical units. The automated configuration technology is the advanced technology of Beijing GuoDianZhiShen Control Technology Co., Ltd through years of accumulated technology in thermal power control field. It makes full use of computercontrol and CRT to provide a configuration solution of I/O database, SAMA control sheet, and the man-machine interface. DOI: http://dx.doi.org/10.11591/telkomnika.v11i4.2378
Turbo Code Design and Implementation of High-Speed Parallel Decoder Yi Bo-nian
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 4: April 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

Due to the high complexity Turbo decoding algorithm, implemented the hardware decoder logic of consumes more resources and storage resources, decode delay larger. In order to meet LTE systems, high reliable transmission of high data rate needs high speed Turbo decoder design faces enormous challenges. This topics select based on LTE system of parallel Turbo Code decoders hardware design and achieved as research direction, select FPGA(Virtex-6) as hardware design and achieved of platform, from Log-MAP algorithm of Sentinel of, and State measure value handed owned calculation in the of owned a of processing, and Diego generation decoding algorithm of parallel of, and parallel interwoven Manager design, and key path optimization technology, aspects analysis, design achieved has LTE Turbo Code high-speed parallel decoders. DOI: http://dx.doi.org/10.11591/telkomnika.v11i4.2393 
Study on Fault Current of DFIG during Slight Fault Condition Xiangping Kong; Zhe Zhang; Xianggen Yin; Zhenxing Li
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 4: April 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

In order to ensure the safety of DFIG when severe fault happens, crowbar protection is adopted. But during slight fault condition, the crowbar protection will not trip, and the DFIG is still excited by AC-DC-AC converter. In this condition, operation characteristics of the converter have large influence on the fault current characteristics of DFIG. By theoretical analysis and digital simulation, the fault current characteristics of DFIG during slight voltage dips are studied. And the influence of controller parameters of converter on the fault current characteristics is analyzed emphatically. It builds a basis for the construction of relay protection which is suitable for the power gird with accession of DFIG. DOI: http://dx.doi.org/10.11591/telkomnika.v11i4.2542
Permanent Magnet Tracking Position Sensor Degang Lv; Ningzhi Jin
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 4: April 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

In view of the disadvantages of traditional position sensor, a novel permanent magnet tracking position sensor is proposed. The hall component is used to convert the magnetic signal reflecting the shaft velocity and position into an electrical signal by the construction and optimization of magnetic field. And then the resolver-to-digital conversion is carried out by arctangent so as to obtain the signals of shaft position and velocity. DOI: http://dx.doi.org/10.11591/telkomnika.v11i4.2335 

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