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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 74 Documents
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Search results for , issue "Vol 11, No 3: March 2013" : 74 Documents clear
A Novel Calibrator for Electronic Transformers Based on IEC 61850 Baoxiang PAN
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 3: March 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

It is necessary for electronic transformer to make calibration before putting it into practice. To solve the problems in actual calibration process, a novel electronic transformer calibrator is designed. In principle, this system adopts both the direct method and the difference method, which are two popular methods for electronic transformer calibration, by this way the application of the system is extended with its reliability improved. In the system design, based on virtual instrument technology, LabVIEW and WinPCap toolkit are used to develop the application software, and it is able to calibrate those electronic transformers following the standard of IEC 61850. In the calculation of ratio and phase error based on fast Fourier transform, a new window function is introduced, and thus the accuracy of calibration, influenced by the frequency vibration, is improved. This research provides theoretic support and practical reference to the development of intelligent calibrator for electronic transformers. DOI: http://dx.doi.org/10.11591/telkomnika.v11i3.2322
Dynamic Virtual Resistance Droop Control Scheme for Distributed Generation System Junping He; Ning Wu; Liang Liang
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 3: March 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

The power quality of a low voltage distributed network is vulnerable to the plunge of a large number of distributed power sources, which could be at serious risk due to high circulating current. In order to overcome this problem, this paper proposes an active power-magnitude and reactive power-frequency droop control scheme for distributed voltage source inverters without a communication line. A novel dynamic virtual resistance control solution is demonstrated to minimize dynamic circulating current based on satisfied output voltage accuracy and stability. Differential and integral terms are added to the droop formulas to enhance the dynamic performance of the inverter and improve the stability for voltage magnitude and frequency. MATLAB simulations show that stable output voltage and small circulating current can be achieved in both grid connected mode and islanding mode by using the proposed scheme. This result is further verified by an experimental testing with two parallel voltage source inverters. DOI: http://dx.doi.org/10.11591/telkomnika.v11i3.2177
Design of Image Processing System Based on Charge Coupled Device Xu Guosheng; Wang Yumei
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 3: March 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

To speed up the image acquisition and make full use of effective information, a design method of CCD partial image scanning system is presented. The system achieves to functions of the high -speed data collection, the high -speed video data compression the real time video data Network Transmission and the real time compression picture data storage. the data processed was transferred to PC through USB2.0 real-time to reconstruct defects microscopic images. The experimental results demonstrated that defects within 50μm～1000μm were inspected effectively by the CCD scanning defects inspection instrument, that this method has a repetition error no more than 2.24 pixels, with high precision and good anti-noise ability. DOI: http://dx.doi.org/10.11591/telkomnika.v11i3.2194
Vibration Characteristics of the Platform in high-speed Railway Elevated Station Wang Tie; Wei Qingchao
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 3: March 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

 Aiming at a large number construction of high-speed railway and elevated railway passenger station, make a dynamics simulation study on the law of platform vibration characteristics on the situation of high-speed train passing through. First, make a brief introduction on the theory of the interaction of the vehicle-elevated station structure in vertical and transverse directions. Secondly, on the background of the actual elevated station structure form, selecting relevant model parameters, establish the train-elevated station coupling dynamics simulation analysis model and calculate it. Finally, based on the calculation results, make an analysis of vibration characteristics of the platform structure, and obtain relevant study conclusions. DOI: http://dx.doi.org/10.11591/telkomnika.v11i3.2218
Mine-Tunnel Design & Monitoring Analysis for Major Faults and Complex Geological Conditions Xiang-dong ZHANG; Shi-xing FAN; Hu-wei ZHANG; Yu ZHANG
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 3: March 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

Mining operations at Nanyang-Slope Coal Mine are considerably challenging. The Nanyang- Slope Coal Field has a complex tectonic structure; having major faults, large fissures and fracture- zones, and great changes in coal-seam thickness. Mine tunnel-way 301 traverses multiple complex faults with developed fractures, broken surrounding rock, and high tectonic stresses. The original rectangular-section tunnel design using anchor-bolt-mesh retainment was prone to rib-spalling, and the problem could not be controlled by use of additional encryption anchors on the tunnel sides. The mud-rock above the tunnel-ceiling is soft and argillized, which expands and softens on contact with water. This caused problems with the epoxy bonding agent failing to effectively secure bolt-anchors to the rock, resulting in anchor-bolt-mesh failure. In consideration of the complex geological conditions, a tunnel construction utilizing a curved wall arch-section and anchor-bolt- mesh-concrete spray was proposed. MJ-40 anchor-rod dynamometers were used to measure the forces in the tunnel rock-anchor bolts; and tunnel-rock deformation and surface displacement was monitored over the course of several weeks using a measuring station. Results show that the construction design effectively lowers the effects of the tectonic stresses on any one part of the tunnel, and demonstrates the safety and reliability of the tunnel-retainment and support design. DOI: http://dx.doi.org/10.11591/telkomnika.v11i3.2302
Cognitive FH Channel Selection for Bluetooth Network Yi Peng; Qingzhi Du; Long Hua; Yubing Shao
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 3: March 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

Bluetooth is a short-range wireless technology that operates in the 2.4GHz unlicensed ISM band, so it will inevitably encounter the interference from other wireless systems and other Bluetooth piconets. Because of the flexible, efficient and reliable spectrum access by adapting the radio’s operating characteristics to the real-time conditions of the environment, cognitive radio technology is apply in Bluetooth network. In this paper, a novel cognitive FH channel selection method which is built based on link quality detection is proposed, interference temperature judgments model is analyzed and cognitive processing cycle of channel access is discussed. The simulation results indicated that cognitive FH Bluetooth network is more anti-interference than conventional Bluetooth systems. DOI: http://dx.doi.org/10.11591/telkomnika.v11i3.2317
Neural Network Aided Kalman Filtering For Integrated GPS/INS Navigation System Haidong GUO
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 3: March 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

Kalman filter (KF) uses measurement updates to correct system states error and to limit the errors in navigation solutions. However, only when the system dynamic and measurement models are correctly defined, and the noise statistics for the process are completely known, KF can optimally estimate a system’s states. Without measurement updates, Kalman filter’s prediction diverges; therefore the performance of an integrated GPS/INS navigation system may degrade rapidly when GPS signals are unavailable. This paper presents a neural network (NN) aided Kalman filtering method to improve navigation solutions of integrated GPS/INS navigation system. In the proposed loosely coupled GPS/INS navigation system, extended KF (EKF) estimates the INS measurement errors, plus position, velocity and attitude errors, and provides precise navigation solutions while GPS signals are available. At the same time, multi-layer NN is trained to map the vehicle manoeuvre with INS prediction errors during each GPS epoch, which is the input of the EKF. During GPS signal blockages, the NN can be used to predict the INS errors for EKF measurement updates, and in this way to improve navigation solutions. The principle of this hybrid method and the NN design are presented. Land vehicle based field test data are processed to evaluate the performance of the proposed method. DOI: http://dx.doi.org/10.11591/telkomnika.v11i3.2189
RFID Spatio-Temporal Data Management WANG Yonghui; XU Jingke; WANG Shoujin
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 3: March 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

Radio-frequency Identification (RFID) technology promises to revolutionize the way we track items in supply chain, retail store, and asset management applications. The size and different characteristics of RFID data pose many interesting challenges in the current data management systems. In this paper, we provide a brief overview of RFID technology and highlight a few of the spatio-temporal data management challenges that we believe are suitable topics for exploratory research. DOI: http://dx.doi.org/10.11591/telkomnika.v11i3.2213
Improved Hysteretic Noisy Chaotic Neural Network for Broadcast Scheduling Problem in WMNs Ming Sun; Yanjun Zhao; Zhengliang Liu; Hui Zhang
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 3: March 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

It has been proven that the noise-tuning-based hysteretic noisy chaotic neural network (NHNCNN) can use the noise tuning factor to improve the optimization performance obviously at lower initial noise levels while can not at initial higher noise levels. In order to improve the optimization performance of the NHNCNN at initial higher noise levels, we introduce a new noise tuning factor into the activation function and propose an improved hysteretic noisy chaotic neural network (IHNCNN) model. By regulating the value of the newly introduced noise tuning factor, both noise levels of the activation function and hysteretic dynamics in the IHNCNN can be adjusted to help to improve the global optimization ability as the initial noise amplitude is higher. As a result, the IHNCNN can exhibit better optimization performance at initial higher noise levels. In order to demonstrate the advantage of the IHNCNN over the NHNCNN, the IHNCNN combined with gradual expansion scheme (GES) is applied to solve broadcast scheduling problem (BSP) in wireless multihop networks (WMNs). The aim of BSP is to design an optimal time-division multiple-access (TDMA) frame structure with minimal frame length and maximal channel utilization. Simulation results in BSP show the superiority of the IHNCNN. DOI: http://dx.doi.org/10.11591/telkomnika.v11i3.2231
Test of DMB-T Signal Based on Software Defined Radio Technique Shanshan Li; Jian Zhou; Yi Zhang
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 3: March 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

With the release of the standard, digital television terrestrial broadcasting is being gradually extended in many places. In order to speed up the extension and the application, also to evaluate the existing digital television terrestrial   broadcasting  system, we need a easy-to-use signal  analysis  and measurement  system. The traditional signal measurement method is through the special hardware circuit to realize, but that method is high cost, and the system structure is complex and single function. To improve the flexibility of the system , we realize the system based on virtual instrument technology. In hardware section, this thesis described the block diagram of the system and the introduction of the NI vector signal analyzer. In software part, this thesis described the overall test system based on LabVIEW and the realization of the system features multi-threading, each step of synchronization signals achieved. DOI: http://dx.doi.org/10.11591/telkomnika.v11i3.2308

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