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28,188 Article Results

Portable Dual Mode Mobile Charger with Hand Crank Generator and Solar Panel

10.11591/ijeecs.v1.i2.pp282-287
Md. Atiqur Rahaman , Nusrat Hoque , Nipu kumar Das , Farial Nur Maysha , MD Morshed Alam
A new method of charging a mobile phone with the help of hand crank generator, and solar panel is being presented in this paper. Solar panel is useful during daylight and hand crank generator can be used at night. So this is a dual mode charger which is operated in either way and both ways do not consume system power. This type of mobile charger is very useful when traveling because it uses solar panel to convert renewable source light into electricity. Mechanical hand crank generator is used which converts mechanical energy into electrical energy and then charges the mobile. No electrical sources are needed for it. Our design uses a compound gear train for transformation of the mechanical energy generated from the hand crank to the generator. For that reason it is convenient as well as economical to use such kind of mobile charger for our mobile phone.
Volume: 1
Issue: 2
Page: 282-287
Publish at: 2016-02-01

Loss of Excitation Faults Detection in Hydro-Generators Using an Adaptive Neuro Fuzzy Inference System

10.11591/ijeecs.v1.i2.pp300-309
Mohamed Salah El-Din Abdel Aziz , Mohamed Elsamahy , Mohamed Moustafa , Fahmy Bendary
This paper presents a new approach for Loss of Excitation (LOE) faults detection in Hydro-generators using Adaptive Neuro Fuzzy Inference System. The proposed scheme was trained by data from simulation of a 345kV system under various faults conditions and tested for different loading conditions. Details of the design process and the results of performance using the proposed technique are discussed in the paper. Two different techniques are discussed in this article according to the type of inputs to the proposed ANFIS unit, the generator terminal impedance measurements (R & X) and the generator RMS Line to Line voltage and Phase current (Vtrms & Ia). The two proposed techniques results are compared with each other and are compared with the traditional distance relay response in addition to other technique. The results show that the proposed Artificial Intelligent based technique is efficient in the Loss of Excitation faults (LOE) detection process and the obtained results are very promising.
Volume: 1
Issue: 2
Page: 300-309
Publish at: 2016-02-01

Optimal DG Placement with the Aim of Profits Maximization

10.11591/ijeecs.v1.i2.pp249-254
Sobhan Dorahaki
Using distributed generation power plants is common due to advantages such as system capacity release, voltage support and reduced energy losses in power networks. Prior to the creation of distributed generation plants (DG), economic calculation is needed in order to find the optimum location. In this study, IEEE 57 bus test system is evaluated using two index of LMP and CP. Then, the optimal location of distributed generation plants is studied in experimental network. Finally, the effects of DG correct location on buses LMP after DG installation is studied.
Volume: 1
Issue: 2
Page: 249-254
Publish at: 2016-02-01

Nonlinear Servomotor in Single Pulse Simulation of Electrical Discharge Machining System Modeling

10.11591/ijeecs.v1.i2.pp319-328
Hassan Lee , Azli Yahya , Nor Hisham Khamis , Shahrullail Samion
Electrical Discharge Machining, EDM is a nonconventional and high precision machining.  EDM system is considered a combination of servo system and EDM process. The servo system precisely controls the gap between electrode and workpiece for the continuous electrical discharges occurrence. Machining performance and stability depend on the performance of servo system. The EDM servo system usually modeled as a linear system, which ignores the nonlinearities of the motor. An assumption that the nonlinearities are insignificant in EDM system model may leads to modeling errors and result in poor control performance. In this study, nonlinear EDM servo system model was presented and the dynamic response of the model was analyzed and compared with the linear model. Simulation result shows a slightly difference in system response and a controller used in linear model is less efficient for a nonlinear EDM servo system model. The results are very useful for control strategy and can contribute to a better machining performance and stability of EDM applications.
Volume: 1
Issue: 2
Page: 319-328
Publish at: 2016-02-01

Prediction of a New Cascaded Hybrid Multilevel Inverter with Less Device Count

10.11591/ijeecs.v1.i2.pp273-281
C.R. Balamurugan , S.P. Natarajan , R. Bensraj
Multilevel inverters have been opted for high power applications due to reduced harmonic distortion, less device voltage stress and modular structure. This work proposes new modified hybrid H-bridge multilevel inverter using auxiliary switch. This proposed inverter produces five levels output with five power devices and clamping diodes as a phase voltage and nine levels as a line voltage.The levels of the inverters are decided based on the phase voltage not on the line voltage. In this paper the performance of the proposed inverter are measured in terms of line voltage. However, by increase in the number of levels the proposed inverter with reduced number of switches produces low switching losses and improves the efficiency of the inverter. This method achieves the variation of Total Harmonic Distortion (THD) in the inverter and output voltage is observed for various modulation indices. Simulation is performed using MATLAB-SIMULINK for line to line output voltage. Variable Amplitude Phase Disposition (VAPD) strategy provides output with relatively low distortion for all the strategies. It is also seen that VAPOD is found to perform better for all strategies since it provides relatively higher fundamental RMS output voltage.
Volume: 1
Issue: 2
Page: 273-281
Publish at: 2016-02-01

IR and Multi Scale Retinex image Enhancement for Concealed Weapon Detection

10.11591/ijeecs.v1.i2.pp399-405
Nashwan Jasim Hussein , Fei Hu , Hao Hu , Abdalrazak Tareq Rahem
A Concealed Weapon Detection (CWD) had been developed by a large number of researchers and technologies. As a result of the weakness of the infrared images in unique altogether graphic items, infrared and MMW images become inaccurate and insufficient to obviously detectand deal withweaponry objectsin an invisible setting. This article uses Multi Scale Retinex and contrast stretching image processing enhancement techniques to improve the recognition of weapons concealed below attire. Specifically, the focus of the study is on detecting weapons and ammos by enhancing the IR pictures based on image processing techniques. Evaluation techniques were empirically proved to be able to show the enhancement percentage progress.
Volume: 1
Issue: 2
Page: 399-405
Publish at: 2016-02-01

Research on the Surface Fractal Characteristic of the Rock with Rockburst Proneness

10.11591/ijeecs.v1.i2.pp349-353
Li Mo-xiao , Zhang Guang , Chen Jing-xi
In order to strengthen the prediction of rockburst and inquire the relationship between the rockburst proneness of rock and its surface fractal characteristic, the surface fractal of the rock was studied by fractal method and uniaxial compression test. The change rules of surface fractal of different types of rock were compared by calculating its fractal dimension of rock before experiment and after experiment. Based on this, we found that the dimension after test is bigger than before test for four kinds of rocks. The rock with stronger rockburst proneness has more intense failure in the loading process and its crack morphology is more complex.
Volume: 1
Issue: 2
Page: 349-353
Publish at: 2016-02-01

Several Mode-Locked Pulses Generation and Transmission over Soliton Based Optical Transmission Link

10.11591/ijeecs.v1.i2.pp288-293
IS Amiri , SE Alavi
A soliton-based optical communication system is presented to generate and transmits several mode locked laser pulses (generated by fiber laser setup) over 50 km fiber and 120 m wireless link. The passive mode-locking feature of the laser system proposed in this paper is based on nonlinear polarization rotation evolution.
Volume: 1
Issue: 2
Page: 288-293
Publish at: 2016-02-01

Design and Simulation for UHF oscillator using SAWR with different schematics

10.11591/ijeecs.v1.i2.pp294-299
M M Elsherbini , M F Elkordy , A M Gomaa
Various schematics for colpitts oscillator with fixed ultra-high frequency using either LC tank circuits or one port surface acoustic wave resonator are presented. Four circuits used to achieve 433.9 MHz oscillating frequency, Two of them using NPN Bipolar junction transistor, while the others using operational amplifier with high speed, gain and accuracy. A comparison between using passive elements as a source of resonance frequency and using SAW resonator is introduced. Another comparison between using an equivalent lumped circuit instead of SAWR package in oscillator design is also introduced. Two different software tools are used to achieve the required simulation. Proteus and ADS tools are used in simulation with AC, S-parameters and hybrid simulation. This paper is considered a direct application for SAW resonators in wide bandwidth ASK Transmitter / Receiver.
Volume: 1
Issue: 2
Page: 294-299
Publish at: 2016-02-01

A Overlapping Carrier Based SPWM for a 5-Level Cascaded H-bridge Multilevel Inverter

10.11591/ijeecs.v1.i2.pp221-228
Kureve D. Teryima , Goshwe Y. Nentawe , Agbo O. David
This paper proposes a switching control for a cascaded H-bridge inverter structure with reduced switches which is used to improve the THD performance of a single phase five level CHB MLI. The multi level inverter is simulated for the conventional carrier overlapping APOD and the proposed carrier overlapping APOD Pulse Width Modulation (PWM) switching control technique. The total harmonic distortion (THD) of the output voltages are observed for both PWM control techniques. The performance of the symmetric CHB MLI is simulated using MATLAB-SIMULINK. It is observed that the proposed carrier overlapping APODPWM provides output with relatively low THD as compared to the conventional carrier overlapping APODPWM.
Volume: 1
Issue: 2
Page: 221-228
Publish at: 2016-02-01

An Interactive Mobile Augmented Reality for Tourism Objects at Purbalingga District

10.11591/ijeecs.v1.i2.pp375-380
Imam Tahyudin , Dhanar Intan Surya Saputra , Haviluddin Haviluddin
This paper presents the development of an interactive mobile Augmented Reality (AR) for tourism promotion with eXtreme programming (XP) at Purbalingga district, Central Java that has many places of tourism attractions such as Owabong, Purbasari Pancuran Mas, Sanggaluri Park and BuperMunjuluhur. By applying the AR concept, it is expected the tourism objects could be enhanced by augmenting the virtual brochures which could be viewed over a mobile device. In this study, mobile device Android platform is used to display interactive brochures of tourism promotioncontaining 3D models, animations, and sounds. The brochure provides information in of real attractions of the tourism objects in Purbalingga district.
Volume: 1
Issue: 2
Page: 375-380
Publish at: 2016-02-01

The Performance of Dynamic-static Spectrum Access Based on Markov Transfer Model

10.11591/ijeecs.v1.i2.pp354-364
Changbiao Xu , Lianjun Zhu
This study presented a non-synchronized random access mechanism that supports dynamic-static spectrum. Generally, the authorized users of two networks (network A and network B) with different frequency bands communicate with each other by using static spectrum. When congestion happened, spectrum holes in their networks can be detected by the opposite networks and then utilized to communicate. Based on queuing theory and Markov transfer model, a user behavior characterized by dynamic-static spectrum access was proposed, and the feasibility of this theoretical model was validated through analog simulation. Thereafter, the theoretical parameters of system performance, like blocking possibility, forced drop-call possibility, and throughput, were measured and compared between dynamic-static mode and unconjugated mode.
Volume: 1
Issue: 2
Page: 354-364
Publish at: 2016-02-01

The Noise Reduction over Wireless Channel Using Vector Quantization Compression and Filtering

10.11591/ijece.v6i1.pp130-138
Iman Elawady , Abdelmounaim Moulay Lakhdar , Khelifi Mustapha
The transmission of compressed data over wireless channel conditions represents a big challenge. The idea of providing robust transmission gets a lot of attention in field of research. In this paper we study the effect of the noise over wireless channel. We use the model of Gilbert-Elliot to represent the channel. The parameters of the model are selected to represent three cases of channel. As data for transmission we use images in gray level size 512x512. To minimize bandwidth usage we compressed the image with vector quantization also in this compression technique we study the effect of the codebook in the robustness of transmission so we use different algorithms to generate the codebook for the vector quantization finally we study the restoration efficiency of received image using filtering and indices recovery technique.
Volume: 6
Issue: 1
Page: 130-138
Publish at: 2016-02-01

Modelling and Design of Inverter Threshold Quantization based Current Comparator using Artificial Neural Networks

10.11591/ijece.v6i1.pp320-329
Veepsa Bhatia , Neeta Pandey , Asok Bhattacharyya
Performance of a MOS based circuit is highly influenced by the transistor dimensions chosen for that circuit. Thus, proper dimensioning of the transistors plays a key role in determining its overall performance.  While choosing the dimension is critical, it is equally difficult, primarily due to complex mathematical formulations that come into play when moving into the submicron level. The drain current is the most affected parameter which in turn affects all other parameters. Thus, there is a constant quest to come up with techniques and procedure to simplify the dimensioning process while still keeping the parameters under check. This study presents one such novel technique to estimate the transistor dimensions for a current comparator structure, using the artificial neural networks approach. The approach uses Multilayer perceptrons as the artificial neural network architectures. The technique involves a two step process. In the first step, training and test data are obtained by doing SPICE simulations of modelled circuit using 0.18μm TSMC CMOS technology parameters. In the second step, this training and test data is applied to the developed neural network architecture using MATLAB R2007b.
Volume: 6
Issue: 1
Page: 320-329
Publish at: 2016-02-01

An Effective Cable Sizing Procedure Model for Industries and Commerial Buildings

10.11591/ijece.v6i1.pp34-39
M. Pratap Nair , K. Nithiyananthan
This paper mainly focuses on the cable sizing methods and calculation of electrical cables according to the various international standards. For instance, International Electrotechnical Commission (IEC), National Electrical Code (NEC), British Standard (BS) and Institute of Electrical and Electronics Engineers (IEEE). The basic philosophy underlying any cable sizing calculations are the same. The main objective of this research work is to develop effective cable sizing model for building services.
Volume: 6
Issue: 1
Page: 34-39
Publish at: 2016-02-01
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