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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 101 Documents
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Search results for , issue "Vol 12, No 6: June 2014" : 101 Documents clear
Automatic Selection for Optimal Calibration Model of Camera Xuecong Li; Yonghua Wang; Qinruo Wang
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 6: June 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

When calibration model express camera status well, calibration result will be accurate. How to select optimal calibration model for different camera by program is significant to calibrate automatically. A method of selecting optimal calibration model was proposed in this paper. First, the models including enough possible status were selected from physical models and Chebyshev models. These models would be taken as the input of our method. Second, candidate calibration models were obtained by variance detection. Third, optimal calibration model was extracted by utilizing detection of minimum description length. Experimental results show that calibration residuals is lowest via optimal model, computation error of principle distance is no more than 0.2 pixels and variance lies in the bounds of 0.5 pixels. DOI : http://dx.doi.org/10.11591/telkomnika.v12i6.5447
Optimal Asymmetric S-shape Acceleration/Deceleration for Multi-axial Motion Systems Chang-yan Chou; Shyh-Leh Chen
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 6: June 2014
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v12.i6.pp4778-4786

Abstract

In this study, an optimization algorithm is proposed for asymmetric s-shape acceleration/deceleration to achieve better contour accuracy for biaxial systems. The optimization is based on the method of genetic algorithm incorporated with the constraints made by the motion system. Numerical simulations of an XY table driven by linear motors following a simple cornering path verify the effectiveness of the proposed algorithm.
Analysis of DFIG Wind Turbine During Steady-State and Transient Operation Omer Elfaki Elbashir; Wang Zezhong; Liu Qihui
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 6: June 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

In recent years, there has been a worldwide growth in the exploitation of wind energy. In the wind power industry, the majority of grid-connected wind turbines are equipped with doubly fed induction generators (DFIGs) because of their advantages over other wind turbine generator (WTG) systems. Therefore, much research effort has gone into the issues of modeling, analysis, control and grid integration of DFIG wind turbines. This paper deals with the modeling, analysis, and simulation of a DFIG driven by a wind turbine. The grid connected wind energy conversion system (WECS) is composed of DFIG and two back to back PWM voltage source converters (VSCs) in the rotor circuit. A machine model is derived in an appropriate reference frame. The grid voltage oriented vector control is used for the grid side converter (GSC) in order to maintain a constant DC bus voltage, while the stator voltage oriented vector control is adopted in the rotor side converter (RSC) to control the active and reactive powers. DOI : http://dx.doi.org/10.11591/telkomnika.v12i6.5205
The Non-equidistant Multivariable New Information MGM(1,n) Based on New Information Background Value Constructing Zheming He; Xiaoyi Che; Qiyun Liu
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 6: June 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

Applying the principle in which new information should be used fully and modeling method of grey system for the problem of lower precision as well as lower adaptability in non-equidistant multivariable MGM(1,n)model, a non-equidistant multivariable new information MGM(1,n) model was put forward which was taken the mth component as the initialization. As the background value is an important factor affecting the precision of grey system model, based on index characteristic of grey model, the characteristic of integral and new information principle, the new information background value in non-equidistant multivariable new information MGM(1,n) was researched and the discrete function with non-homogeneous exponential law was used to fit the accumulated sequence and the formula of new information background value was given. This new non-equidistant multivariable MGM(1,n) model can be used in equidistance & non-equidistance modeling and has the characteristic of high precision as well as high adaptability. Examples validate the practicability and reliability of the proposed model. DOI : http://dx.doi.org/10.11591/telkomnika.v12i6.4822
Modeling and Simulation of DIGSILENT-based Micro-grid system Yang Zhang; Hongli Yun; Qiang Li; Tonghe Liu
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 6: June 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

The accurate modeling of micro-grid access to power system planning and design stage needs is the primary problem to solve. This paper modeled the micro grid photovoltaic power generation system ,including silicon solar cell, photovoltaic inverters, battery energy storage system, and the micro power distribution system .The use of power system analysis software (DIGSILENT) of actual power system simulation, the simulation results verify the model's correctness. In the power grid fault disturbance, the light intensity of disturbance and the load disturbances, the simulation results show that the optical storage combined with micro network has fast dynamic response characteristics, and its network of grid-connected voltage influenced by the changes of the light and load is little, while more affected by the network fault influence. DOI : http://dx.doi.org/10.11591/telkomnika.v12i6.5471
Test Data Analysis on Voltage Regulation of Proportion Relief Valve Pei Weichi; Cao Fukai; Zhao Shuzhong
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 6: June 2014
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v12.i6.pp4491-4499

Abstract

The miniature reform design was to improve the voltage regulation of regular valve and proportional valve. LabVIEW was used to develop CAT voltage regulation of proportion relief valve with electro hydraulic proportional control and visual instrument. The content of the pressure adjustment of proportional relief valve was introduced from different angles and the steady-state. Test on voltage regulation of proportion relief valve was analyzed. The sampling data were processed and analyzed on a time domain and frequency domain basis. Related conclusions are made by analysis on current linearity, steady-state pressure, and pressure-adjusting delay. Systematic methods and references are provided for the development of other valves to improve the function and the system of proportional valve. DOI: http://dx.doi.org/10.11591/telkomnika.v12i6.5488
Emergency Resource Scheduling Problem Based on Improved Particle Swarm Optimation Wu Kaijun; Shan Yazhou; Lu Huaiwei
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 6: June 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

Emergency resource scheduling is a kind of NP combination problem which possesses important practical value. In order to overcome the problems such as long computing time and easy to fall into local best for traditional heuristic optimization algorithm, an Improved Particle Swarm Optimization algorithm (IPSO) is proposed，the algorithm uses the randomicity and stable tendentiousness characteristics of cloud model, adopts different inertia weight generating methods in different groups, the searching ability of the algorithm in local and global situation is balanced effectively. In the paper, the algorithm is used to solve the emergency resource scheduling problem, the mathematic mode is established and the solution algorithm is developed. The simulation results of example show that the algorithm has faster search speed and stronger optimization ability than GA and PSO algorithm. DOI : http://dx.doi.org/10.11591/telkomnika.v12i6.5437
Investigations of Wireless Sensor Networks for Indoor Particulate Matter Monitoring Heng Luo; Ai Huang Guo; Jianping Chen; Yu Tang; Weizhong Yu; Yafei Ji
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 6: June 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

Precise measurement of indoor mass concentration of particulate matter is criticially important for the health risk evaluation since modern people spend more than 90% of their life indoors. For the sake of accuracy, long-term monitoring systems should be deployed among which wireless sensor network is a sound solution. However, most of the wireless sensor networks are battery powered and thus energy management scheme should be implemented to prolong the lifetime of the whole network. Meanwhile, sample sites must be selected carefully to avoid the results bias. In this paper, the importance of sample interval as well as sample locations is investigated theoretically and practically. Results show that by adopting efficicent power management scheme, more than 67% of energy can be saved. Finally, methods of sample interval configuration as well as sample sites selection are proposed. DOI : http://dx.doi.org/10.11591/telkomnika.v12i6.5494
Parameter Analysis of Fluid-Solid Coupling for Wet Brake Disc Xunjia Zheng; Tianhong Luo; Ce Jia
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 6: June 2014
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v12.i6.pp4861-4867

Abstract

Due to the poor conditions of wet brake cooling and the high temperature of the working characteristics, this paper intended to introduce the oil film vadose between the brake linings, considered the variation of volume of grooves on the friction plate, and then proposes the three-dimensional transient dynamic response of fluid-solid coupling mathematical model. By parameter analysis of the disc transient thermal stress field distribution on the friction plate, and according to the real dimension of the brake disc, the distribution of the temperature and the stress of the wet brake disc during the braking are analyzed, the variation of temperature field and stress field in friction plate are obtained. The data curves shown the temperature and the stress are coupled. Finally, the results shows that the mathematical model is effective and feasible.
Adaptive Fuzzy Sliding Mode Control for Hydraulic Servo System of Parallel Robot Fenglan Jia; Li Hou; Yongqiao Wei; Yunxia You; Lili Yan
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 6: June 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

The hydraulic servo control system, which is the important component of parallel robot, is a high order, nonlinear, dynamic asymmetry, parameter uncertain system, which seriously affect dynamic performance of robot, so it is very difficult to gain good performance with traditional control. Based on sliding mode variable structure control method combined with fuzzy control and adaptive control, an adaptive fuzzy sliding mode control algorithm was presented by taking the Stewart platform servo control system of parallel robot as the research object, and the uncertain term of the sliding mode controller was approximated with adaptive fuzzy control method. The simulation results showed that compared with the conventional PID control applied to the same hydraulic control system, the new controller has a strong robustness, good traceability with regard to model uncertainties, unknown external disturbances and changes in the operation conditions, as well as much better adaptive characteristics. The simulation results also showed that the adaptive fuzzy sliding mode control system can solve the dynamic asymmetrical performance and poor stability of parallel robot, and can greatly improve the robot control precision. DOI : http://dx.doi.org/10.11591/telkomnika.v12i6.5087

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