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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 55 Documents
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Search results for , issue "Vol 10, No 8: December 2012" : 55 Documents clear
Modeling, Analysis and Design of Feedback Operational Amplifier for Undergraduate Studies in Electrical Engineering Han Yang
Indonesian Journal of Electrical Engineering and Computer Science Vol 10, No 8: December 2012
Publisher : Institute of Advanced Engineering and Science

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Abstract

The analog electronics is a challenging subject for undergraduate students in electrical engineering, due to the complex combination of many previous subjects, such as linear circuit analysis, signal and system, linear control theory and some sort of mathematics. This paper presents the modeling, analysis and design of the operational amplifier, which is used as benchmark system for analog electronics, for undergraduate studies in electrical engineering. Followed by the introduction of the operation amplifier circuit, the design of feedback network for the operational amplifier using MATLAB is presented. The bandwidth and sensitivity analysis for the feedback control loop are also discussed. In order to enhance the stability margin and dynamic characteristics of the operational amplifier, the lead compensator is designed for the feedback loop by adding capacitive component to the feedback resistive network. The presented analysis and design method of the operational amplifier by using MATLAB/SIMULINK can be highly effective to compliment the classroom teaching for circuit design courses for undergraduate studies in electrical engineering. DOI: http://dx.doi.org/10.11591/telkomnika.v10i8.1609
Four Order Electrostatic Discharge Circuit Model and its Simulation Ke Wang; Jinshan Wang; Xiaodong Wang
Indonesian Journal of Electrical Engineering and Computer Science Vol 10, No 8: December 2012
Publisher : Institute of Advanced Engineering and Science

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Abstract

According to the international electrotechnical commission issued IEC61000-4-2 test standard, through the electrostatic discharge current waveform characteristics analysis and numerical experiment method, and construct a new ESD current expression. Using Laplasse transform, established the ESD system mathematical model. According to the mathematical model, construction of passive four order ESD system circuit model and active four order ESD system circuit model, and simulation. The simulation results meet the IEC61000-4-2 standard, and verify the consistency of the ESD current expression, the mathematical model and the circuit model. DOI: http://dx.doi.org/10.11591/telkomnika.v10i8.1632
Research of STATCOM Impact on Wind Farm LVRT and Protection YANG Bai-jie; CHAO Qin; YUAN Tie-jiang; YI Hai-dong
Indonesian Journal of Electrical Engineering and Computer Science Vol 10, No 8: December 2012
Publisher : Institute of Advanced Engineering and Science

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Abstract

Because of the wind turbine which possesses low voltage ride through (LVRT) capability can keep on working during the system fault, greatly reduce the adverse effects of power grid and ensure the relay protection reliability. However, the asynchronous wind turbine which widely used in home and abroad doesn’t have enough LVRT capability. So this paper proposes a method to enhance the LVRT capability of fixed speed induction generator (FSIG) based on wind farm using static synchronous compensator (STATCOM). And this paper establishes the simulation model of asynchronous wind generator wind farm and STATCOM in Matlab/Simulink software; the research results show that the STATCOM device can improve asynchronous wind farm LVRT capability. Then analysis the asynchronous wind generator which possess LVRT ability characteristics and the time of the action protection relations．According to the current wind farm system protection configuration, studying the asynchronous wind farm which with STATCOM device effect on protection configuration of system and the existing problems. At last, putting forward some reasonable measures of improving LVRT cooperate with relay protection characteristics and minimizing probability of wind power units take off the grid． DOI: http://dx.doi.org/10.11591/telkomnika.v10i8.1650
Deformation sensing of colonoscope on FBG sensor net Yi Xinhua; Wang Mingjun; Cheng Xiaomin
Indonesian Journal of Electrical Engineering and Computer Science Vol 10, No 8: December 2012
Publisher : Institute of Advanced Engineering and Science

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Abstract

Owing to the complex condition of human intestinal and non-visualization, Loop formation of colonoscope often happens to hurt the patient during the diagnosis of colon. This paper presents a deformation detecting method using fiber brag grating(FBG) sensor net to real-time display the shape of colonoscope that would help the endoscopist how to manipulate the colonoscope into the body. The structure configuration and packing method of a FBG sensor net was described and the relative coefficient matrix between the curvature and shift of wavelength was acquired by experiment calibration. The position of FGB sensor point on the colonoscope relative to the handling part of the colonoscope can be derived by curvature information and the deformation of colonoscope can be reconstructed using curve fitting. Experiment results verified that the deformation sensing method was feasible and accuracy of the tip position can reach 4.5mm of the colonoscope with the length 1200mm. DOI: http://dx.doi.org/10.11591/telkomnika.v10i8.1693
Two dimensional mixed traffic flow considering the transit traffic Li Yang; Junhui Hu; Lingjiang Kong
Indonesian Journal of Electrical Engineering and Computer Science Vol 10, No 8: December 2012
Publisher : Institute of Advanced Engineering and Science

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Abstract

Based on the two-dimension cellular automaton traffic flow model (BML model), a mixed traffic flow model for urban traffic considering the transit traffic is established in this paper by using the Don't block the box rules. We have investigated the influences of the transit traffic ratio, and found that, in most cases, the urban traffic flow exhibited jam phase. Moreover, focusing on the traffic lights cycle, it is found that the average flow has the periodic fluctuation phenomenon, and we have explained this periodical oscillation change under different boundary conditions. The comparison to practical measured data shows that our stimulation results are accordant with the changes of real traffic flow, which confirms the accuracy and rationality of our model. DOI: http://dx.doi.org/10.11591/telkomnika.v10i8.1627
Identification of robot arm’s joints’ time-varying stiffness under loads Rui Xu; Qiang Chen; Guolai Yang
Indonesian Journal of Electrical Engineering and Computer Science Vol 10, No 8: December 2012
Publisher : Institute of Advanced Engineering and Science

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Abstract

This paper is concerned with the identification problem of two degree of freedom robot arm’s joints’ time-varying stiffness under time-varying torque loads. The industrial robot arms can be simplified into series hinged linkage mechanism. The unrestraint dynamic equation of two degrees of freedom robot arm can be obtained by using analytical mechanics method. The model which was established in Pro/E had been imported into ADAMS for simulation. And the simulation consisted of free vibration and forced vibration. Then by choosing limited memory least square method and using the post-processing measured variables, time-varying stiffness could have been identified. Finally, the calculative stiffness was compared to the “real” stiffness which was simulated in ADAMS. The whole process shows that the robot arm’s dynamic model and the method of identification are both effective. DOI: http://dx.doi.org/10.11591/telkomnika.v10i8.1644
High Frequency Characteristic Of Rogowski Coil Ping Li; Tao Liang; Yangchun Cheng; Liang Zhao
Indonesian Journal of Electrical Engineering and Computer Science Vol 10, No 8: December 2012
Publisher : Institute of Advanced Engineering and Science

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Abstract

According to the transfer impedance getting from distributed parameter model,we analyse the influences of magnetic conductivity ，the number of turns ,capacitance to the shield and interturn capacitance on the high frequency characteristic of Rogowski coil through theories and simulations. Simulation shows that there are a series of zeros in high frequency band, but on the whole, the high frequency response does not change with the increase of frequency. The magnetic conductivity, number of turns and capacitance to the shield can influence the frequency at which zero appears, but the high frequency characteristic of Rogowski coil can’t be influenced. Considering the interturn capacitance, the curve of high-frequency response characteristic presents a "V" shape ", and this leads to the reduction of higher cut-off frequency. So we should try to decrease the interturn capacitance to reduce the influence on the high frequency characteristic. DOI: http://dx.doi.org/10.11591/telkomnika.v10i8.1688
The Fault Diagnosis of Bora Engine CH Emissions based on Neural network Tie Wang
Indonesian Journal of Electrical Engineering and Computer Science Vol 10, No 8: December 2012
Publisher : Institute of Advanced Engineering and Science

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Abstract

Along with an increase of the automobile possession quantity, the air pollution caused by the pollutant of the automobile emissions is serious day by day. The emission diagnosis become the important technology for guaranteeing the human sustainable development. The article introduces the reasons of CH excessive emissions in vehicle discharge of pollutants, the impact which CH excessive emissions have on our environment, expounds the advantages of SOM neural network and BP neural network, briefly describes why these two tools are applied to the project. In the article, diagnostic procedures are written by MATLAB software, parameters are analyzed which influence CH emission of a particular model engine. In the article, Volkswagen Bora acts as experimental models, the data stream is extracted, then the data are classified, trained and operated, the diagnostic results and diagnostic accuracy are finally obtained. Through SOM, the accuracy rate of fault sample data diagnostic is 73.3% and BP is 65.1%. The results of sample show that: SOM neural network can quickly and accurately diagnose the reasons of the CH excessive emissions in vehicle discharge of pollutants. DOI: http://dx.doi.org/10.11591/telkomnika.v10i8.1702
Coordinated Motion Control of Autonomous and Semiautonomous Mobile Agents Qing-Quan Liu
Indonesian Journal of Electrical Engineering and Computer Science Vol 10, No 8: December 2012
Publisher : Institute of Advanced Engineering and Science

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Abstract

This paper addresses networked control problems which arise in the coordinated motion control of autonomous and semiautonomous mobile agents, where the sensors and controllers are geographically separated and connected by digital communication channels carrying a finite number of bits per unit time. Different from the existing results, this case with quantized output measurements and limited data rates is considered. A quantization, coding and control scheme is presented under communication constraints. In particular, it is shown that the unstable plant may be stabilizable in the mean square sense if the data rate of the channel is greater than the lower bound proposed in our results. Simulation results show the validity of the proposed scheme. DOI: http://dx.doi.org/10.11591/telkomnika.v10i8.1192
Test Platform Development for Fuel Cell Vehicle’s Hydrogen Management System LAI Xunian; LI Ling; LIANG Weiming; WANG Binglong; LIU Fen
Indonesian Journal of Electrical Engineering and Computer Science Vol 10, No 8: December 2012
Publisher : Institute of Advanced Engineering and Science

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Abstract

This paper has proposed a Hardware-in-Loop test platform for Hydrogen Management System (Short for HMS) based on hardware of PXI and software of LabVIEW of National Instrument company(short for NI) and Matlab/Simulink for plug-in fuel cell vehicle, replacing the real car experiment platform with the feature of complicated test environment, variable parameter, and limited condition in debugging stage. According to HMS working behavior, it has designed the HMS model by simulink for the test platform. And according to HMS’s control strategy, I/O signal map, CAN communication and sensor characteristics, it has designed the platform hardware configuration, software program, test interface, and rapidly made validation to control logic and fault diagnosis of Hydrogen Management Unit (Short for HMU). The experiment result shows that this test platform is effective for HMU control logic validation, system status monitor, fault injection, fault tracing, and it can shorten the vehicle research and development cycle, reduce the development cost, optimize test environment and promise safety for test engineer. DOI: http://dx.doi.org/10.11591/telkomnika.v10i8.1639

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