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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 102 Documents
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Search results for , issue "Vol 12, No 4: April 2014" : 102 Documents clear
Hybrid K-means Algorithm and Genetic Algorithm for Cluster Analysis Dianhu Cheng; Xiangqian Ding; Jianxin Zeng; Ning Yang
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 4: April 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

Cluster analysis isa fundamental technique for various filed such as pattern recognition, machinelearning and so forth. However, the cluster number is predefined by users inK-means algorithm, which is unpractical to implement.  Since the number of clusters is a NP-completeproblem, Genetic Algorithm is employed to solve it. In addition, due to the largetime consuming in conventional method, an improved fitness function isproposed. According to the simulation results, the proposed approach isfeasible and effective. DOI : http://dx.doi.org/10.11591/telkomnika.v12i4.4805
Research and Design of Nuclear Fuel Manipulate Crane ControlSystem Zhaohui Mu; Rao Liu; Weidong Li
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 4: April 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

In order to solve the disadvantages of the Nuclear Fuel Manipulate Crane (ab. MC), the control system of MC is researched and designed, which is based on the operation experiences about Nuclear Fuel Transtion and Storage System (ab.PMC) in Daya Bay and Ling’ao Nuclear Power Plant.The new control system adopts single failure principle and makes use of the Device-net technology that is diffusely applied and extraordinary tried in practice. There are two Device-nets and one Ethernet, the two kinds of nets are combined.Applying the new technologies and new equipments, the new control system solves the defects which Ethernet and a single set of PLC don’t satisfy single failure principle, improves the safety and whole performance of MC loading and unloading of nuclear fuel assembly, and makes control system simply to wire. According to the design of the new control system, the product of MC has been successfully applied to Educate Center in Daya Bay Nuclear Power Site and FangchenggangNuclear Power Plant, and the result is obvious. DOI : http://dx.doi.org/10.11591/telkomnika.v12i4.4835
The Design of PID Controller Based On Hopfield Neural Network Wenxia Du; Xiuping Zhao; Feng Lv; Hailian Du
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 4: April 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

With the complexity increase in industrial production process, the traditional Proportion-Integration-Differentiation(PID) control can not meet the requirements of the control system performance. Because neural network has the ability of adaptive, self-learning and nonlinear function approximation, control equality of system is improved if it is combined with traditional PID. In the paper, Hopfield neural network based on Hebb rules is used to identify the parameters of system, and then the state space model is established. Hopfield Neural network has the function of optimal calculation, PID controller based on Hopfield neural network is designed for a system can optimize the parameter of PID in real-time and improve control accuracy. Simulation result show the performance index is greatly improved. DOI : http://dx.doi.org/10.11591/telkomnika.v12i4.4925
Study on the Nonstationary jammer Suppression for DSSS Receiver Zhe-jun Diao; Ji-ning Feng; Xiao-bo Yang
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 4: April 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

Using TVAR(Time Varying AR) model and adaptive notch filter is a new method for the non-stationary jammer suppression in DSSS(Direct Sequence Spread Spectrum). The performance of TVAR model for IF (Instantaneous Frequency) estimation will be affected by some factors such as basis functions. The DSSS (Direct Sequence Spread Spectrum) is sensitive to non-stationary jammer, especially the LFM (Frequency Modulation) jammer. Focusing on this problem, the optimal basis function of TVAR model for the IF estimation of the LFM signal is obtained in this paper. Besides the depth and width of notching, the phase properties of notch filter affect the SINR of correlation output to the narrow band jammer suppression in DSSS, in response to the problem the closed solution of correlation output SINR improvement has been derived when a single frequency jammer passes through direct IIR notch filter, and its performance has been compared with those of five coefficient FIR filters. Later, a novel method for LFM jammer suppression based on Fourier basis TVAR model and direct IIR notch filter is proposed. The simulation results show the effectiveness of the proposed method. DOI : http://dx.doi.org/10.11591/telkomnika.v12i4.4733
CLF Based Stabilization of Chaos in PMSM with Uncertain Parameters Chuansheng Tang; Yuehong Dai; Hua Sun
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 4: April 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

The robust stabilization problem of chaos suppression for permanent magnet synchronous motors (PMSM) drive system is investigated in presence of parametric uncertainties. Based on control Lyapunov function (CLF) approach, a new state feedback controller is designed to realize the state of the system globally asymptotically stable. The stability of the proposed control scheme is verified via Lyapunov stable theory. Finally, simulation results illustrate the effectiveness of the presented method. DOI : http://dx.doi.org/10.11591/telkomnika.v12i4.4096
Analysis on Channel Capacity of Transform Domain Communication System Wei Naiqi; Chen Zili; Lv Junwei; Zhu Anshi
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 4: April 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

Transform Domain Communication System (TDCS) has caught attention for its characteristics of flexible spectrum application, excellent anti-interference performance and low interception probability. Analysis on channel capacity is one aspect of important basic theory research for TDCS. The fundamental principle of TDCS is studied at first. Then the channel capacity model of TDCS is deduced and built on the background of Gaussian white noise channel with typical interference. The channel capacity of TDCS under different spectrum sensing methods is investigated on the basis of the model. The research indicates that the spectrum sensing methods based on AR model and wavelet-packet transform make more improvement for TDCS channel capacity. Therefore, from the perspective of maximizing TDCS channel capacity, the spectrum sensing methods based on AR model and wavelet-packet transform can be adopted. DOI : http://dx.doi.org/10.11591/telkomnika.v12i4.4112
Uncertain Attribute Graph Sub-Graph Isomorphism and its Determination Algorithm Yanjun Zhao; Chunying Zhang
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 4: April 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

The expectative sub-graph isomorphism of uncertain attribute graph is based on the analysis of complex network structure and the characteristic of uncertain attribute graph. The expectative sub-graph isomorphism of uncertain attribute graph is only one threshold value as constraint conditions. The method is simple, but the computation is large amount. Therefore, this paper brings in the definition of sub-graph isomorphism of uncertain attribute graph, and explains the concept.  Then, this paper designs and comes true the algorithm ofsub-graph isomorphism. Finally, through the experiments proves that sub-graph isomorphic is better than expectative sub-graph, and it analyzes the variation in the different threshold cases. The research of sub-graph isomorphism algorithm laid the foundation for uncertain attribute graph sub-graph query and community mining. DOI : http://dx.doi.org/10.11591/telkomnika.v12i4.4774 
Class Variance Based Instruction function for Microscope Auto-focus Lifei Deng; Hongwei Shi; Yaowu Shi; Lanxiang Zhu
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 4: April 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

This paper proposes an auto-focus Instruction function. The function is derived from Ostu segmentation. It uses class variance of segmentation result to instruct auto-focus process. Compare with the exist functions, class variance function need a small calculation mount. It is immunity to jam coming from camera and other inspection. It responses in a wide object distance range. And the value changes in a large range. All this features make this function is most flexible for microscope real-time auto-focus process. This paper analyzes the function and compares it to some traditional function. All the data are based practical instrument. DOI : http://dx.doi.org/10.11591/telkomnika.v12i4.4784
Zero Magnetic Flux Short-circuit Current Limiter Based on Passivity Control Bing Wong; Zhengcai Fu
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 4: April 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

According to the basic principle of zero flux short-circuit current limiter, the control method of the space vector control was applied to the inverter to generate a tracking current which is to compensate the magnetic flux. Based on the theory of passivity control, the energy formation and damping injection method was used into designing the control part. In the environment of MATLAB/SIMULINK, a simulation model was established for short-circuit current limiter and passivity control. Compared with the traditional control method, short-circuit current limiter under passivity control showed a better steady state response. DOI : http://dx.doi.org/10.11591/telkomnika.v12i4.3874
Optimal Analysis on Reactive Capacity of Control Winding for Dual Stator-Winding Induction Generator Jinyong Yu; Kai Zhang; Lingshun LIU; Shutuan Zhang; Jing Jiang
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 4: April 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

The minimizing to reactive power of control winding of the dual stator-winding induction generator is key to optimization of the novel generator system. It is determined by parameters of machine, load, rotating speed and speed range and exciting capacitors paralleled with the output terminal of power winding. In this paper, Based on analysis on working principle of conventional three-phase induction generator excited by capacitors with variable load and variable speed,  the determination of excited capacitors to minimize the reactive power of control winding under variable load and speed is proposed, the control law of optimal excited current is presented. DOI : http://dx.doi.org/10.11591/telkomnika.v12i4.4757

Page 10 of 11 | Total Record : 102

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