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27,762 Article Results

IDDQ Testing of Low Voltage CMOS Operational Transconductance Amplifier

10.11591/ijece.v8i3.pp1467-1477
Maninder Kaur , Jasdeep Kaur
The paper describes the design for testability (DFT) of low voltage two stage operational transconductance amplifiers based on quiescent power supply current (IDDQ) testing. IDDQ testing refers to the integral circuit testing method based upon measurement of steady state power supply current for testing both digital as well as analog VLSI circuit. A built in current sensor, which introduces insignificant performance degradation of the circuit-under-test, has been proposed to monitor the power supply quiescent current changes in the circuit under test. Moreover, the BICS requires neither an external voltage reference nor a current source and able to detect, identify and localize the circuit faults. Hence the BICS requires less area and is more efficient than the conventional current sensors. The testability has also been enhanced in the testing procedure using a simple fault-injection technique. Both bridging and open faults have been analyzed in proposed work by using n-well 0.18µm CMOS technology.
Volume: 8
Issue: 3
Page: 1467-1477
Publish at: 2018-06-01

Theoretical Analysis of a Three-Phase Bidirectional Isolated DC-DC Converter Using Phase-Shifted Modulation

10.11591/ijpeds.v9.i2.pp495-503
Zhong Yih Tan , Nadia Mei Lin Tan , Ida Suzana Hussain
A three-phase bidirectional isolated dc-dc converter consists of two six-pulse two-level active converters that enable bidirectional power flow by introducing a lag phase-shift angle of one converter with respect to the other converter. This paper explains the operating modes of a three-phase bidirectional isolated dc-dc converter in detail, taking into account the transfer of energy between the dc voltage sources and high-frequency ac inductances in the three-phase bidirectional isolated dc-dc converter. The power flow of the dc-dc converter is also examined based on the operating modes.
Volume: 9
Issue: 2
Page: 495-503
Publish at: 2018-06-01

Operating Task Redistribution in Hyperconverged Networks

10.11591/ijece.v8i3.pp1629-1635
Mohammad Alhihi , Mohammad Reza Khosravi
In this article, a searching method for the rational task distribution through the nodes of a hyperconverged network is presented in which it provides the rational distribution of task sets towards a better performance. With using new subsettings related to distribution of nodes in the network based on distributed processing, we can minimize average packet delay. The distribution quality is provided with using a special objective function considering the penalties in the case of having delays. This process is considered in order to create the balanced delivery systems. The initial redistribution is determined based on the minimum penalty. After performing a cycle (iteration) of redistribution in order to have the appropriate task distribution, a potential system is formed for functional optimization. In each cycle of the redistribution, a rule for optimizing contour search is used. Thus, the obtained task distribution, including the appeared failure and success, will be rational and can decrease the average packet delay in the hyperconverged networks. The effectiveness of our proposed method is evaluated by using the model of hyperconverged support system of the university E-learning provided by V.N. Karazin Kharkiv National University. The simulation results based on the model clearly confirm the acceptable and better performance of our approach in comparison to the classical approach of task distribution.
Volume: 8
Issue: 3
Page: 1629-1635
Publish at: 2018-06-01

Development of Test Vessel for Gas Insulation Breakdown Test

10.11591/ijpeds.v9.i2.pp873-879
Ayuamira Zahari , Hidayat Zainuddin , Muhammad Saufi Kamarudin , Nur Farhani Ambo , Jamaludin Mohd Wari , Imran Sutan Chairul
This paper discusses a new test vessel developed to investigate the breakdown test performance of gas insulation. The test vessel is equipped with certain specialty including pressure chamber and control measures. Through help from a steering, it is provide of controlling the gap length of the electrodes without the need of removing the gas. Other control measures include humidity, temperature, and pressure readings. The humidity and temperature are read wirelessly and from the readings, the necessary atmospheric corrections can be made according to standards. The developed vessel is then tested with AC breakdown test using air with various gap lengths and various electrode configurations. There are two types of electrode configuration used in this project i.e., rod (R0.5)-plane and plane-plane.
Volume: 9
Issue: 2
Page: 873-879
Publish at: 2018-06-01

A Study on PHERB Powertrain Modeling and Analysis

10.11591/ijece.v8i3.pp1822-1829
J. S. Norbakyah , A. R. Salisa
A study on plug-in hybrid electric recreational boat (PHERB) powertrain with a special energy management strategy modeling and analysis was presented in this paper. Firstly, the boat components are sized to meet the expected power and energy requirements through a power flow analysis. Then, the model is tested numerically in the MATLAB/SIMULINK environment using the existing driving cycle. The accuracy of the model is verified by a comparison of the component between the simulation results from PHERB and advanced vehicle simulator (ADVISOR) software. The simulation results of component, fuel economy and emission of PHERB and hybrid electric vehicle models in ADVISOR are compared.
Volume: 8
Issue: 3
Page: 1822-1829
Publish at: 2018-06-01

A Preference Model on Adaptive Affinity Propagation

10.11591/ijece.v8i3.pp1805-1813
Rina Refianti , Achmad Benny Mutiara , Asep Juarna , Adang Suhendra
In recent years, two new data clustering algorithms have been proposed. One of them isAffinity Propagation (AP). AP is a new data clustering technique that use iterative message passing and consider all data points as potential exemplars. Two important inputs of AP are a similarity matrix (SM) of the data and the parameter ”preference” p. Although the original AP algorithm has shown much success in data clustering, it still suffer from one limitation: it is not easy to determine the value of the parameter ”preference” p which can result an optimal clustering solution. To resolve this limitation, we propose a new model of the parameter ”preference” p, i.e. it is modeled based on the similarity distribution. Having the SM and p, Modified Adaptive AP (MAAP) procedure is running. MAAP procedure means that we omit the adaptive p-scanning algorithm as in original Adaptive-AP (AAP) procedure. Experimental results on random non-partition and partition data sets show that (i) the proposed algorithm, MAAP-DDP, is slower than original AP for random non-partition dataset, (ii) for random 4-partition dataset and real datasets the proposed algorithm has succeeded to identify clusters according to the number of dataset’s true labels with the execution times that are comparable with those original AP. Beside that the MAAP-DDP algorithm demonstrates more feasible and effective than original AAP procedure.
Volume: 8
Issue: 3
Page: 1805-1813
Publish at: 2018-06-01

Embedded Automated Vision for Double Parking Identification System

10.11591/ijeecs.v10.i3.pp1221-1226
Norasyikin Fadilah , See Yoon Soon , Hadzfizah Radi
The aim of this work is to assist the city administration issue which involve the traffic flow disruption in an urban area. One of the causes of traffic flow disruption is double parking; thus, in this work, an automated double parking identification and alert system was developed using embedded vision system and internet of things. A camera was utilized to acquire the image of a parking area, and the image was processed using Beaglebone Black processor. A computer vision algorithm was developed to process the image using background subtraction, region of interest identification, and color analysis. When a double parked vehicle is detected, the data was sent into the cloud automatically to alert the city administrator for further action. The developed system achieved 91% accuracy in detecting the traffic violation of double parking.
Volume: 10
Issue: 3
Page: 1221-1226
Publish at: 2018-06-01

A Novel Multi-Functional DSTATCOM with Distribution Generation using FRC Controller

10.11591/ijece.v8i3.pp1373-1382
CH. Sri Prakash , G. Kesava Rao , Obbu Chandrasekhar , P. V. Satyaramesh
Distribution Generation plays a significant role in remote areas where the utility grid is affected and initializing by renewable energy sources to acquire the sufficient power demand. In distribution system, it is very exigent consumer related concern which is confronted due to mis-operation of massive non-linear load apparatus. A multi-functional distributed static compensator incorporates the best choice for enhancing the power quality features with effective control scheme under rambled non-linear loads. Conventional control schemes are more adversed with greater switching losses due to extreme harmonic frequencies in a refernce current component. This paper proposes, a novel multi-objective fundamental reference current control scheme based multi-functional DSTATCOM furnishes the current harmonic compensation at PCC, reactive power compensation, power factor correction, active power exchanging, minimizing the switching losses, incredible efficiency and power factor correction. The validation of proposed multi-functional DSTATCOM with proposed control strategy under rated capacity of distribution generation is evaluated by using Matlab/Simulink platform and simulation results are presented.
Volume: 8
Issue: 3
Page: 1373-1382
Publish at: 2018-06-01

Accuracy Analysis of Latin-to-Balinese Script Transliteration Method

10.11591/ijece.v8i3.pp1788-1797
I N. Jampel , Gede Indrawan , I W. Widiana
Balinese script writing, as one of Balinese cultural richness, is going to extinct because of its decreasing use. This research is one of the ways to preserve Balinese script writing using technological approach. This research focused on accuracy analysis of Latin-to-Balinese script transliteration method on mobile application since mobile computing becomes more important way on preservation effort. This analysis used an existing method from few research in this area, i.e. method on mobile application that was called Transliterasi Aksara Bali (TAB). The analysis was based on certain document of Balinese script writing rules and examples. Through the experiment, TAB was considered has accuracy over 68% (103 of 151) cases and improvement recommendation on thirteen kind of special words. This research contributes on the accuracy analysis and that recommendation for future development of Latin-to-Balinese script transliteration method.
Volume: 8
Issue: 3
Page: 1788-1797
Publish at: 2018-06-01

Design of PI and Fuzzy Logic Controllers for Distribution Static Compensator

10.11591/ijpeds.v9.i2.pp465-477
S.R. Reddy , P.V. Prasad , G.N. Srinivas
This paper presents study of distribution static compensator (D-STATCOM) for compensation of reactive power, harmonic distortion mitigation and load balancing in three phase three wire nonlinear load distribution system. The proposed control algorithm is developed based on synchronous reference frame theory using PI and FUZZY logic controller. The obtained reference current signal from control algorithm is compared in hysteresis band current controller for better switching of D-STATCOM. The performance of DSTATCOM with PI and fuzzy logic controller is also analysed and compared for DC voltage regulation and harmonic distortion mitigation .The proposed method is provided effective compensation for reactive power, harmonic distortion mitigation and load voltage balancing. The simulation results are obtained using MATLAB/SIMULINK soft ware.
Volume: 9
Issue: 2
Page: 465-477
Publish at: 2018-06-01

Frequency Reconfiguration Mechanism of a PIN Diode on a Reconfigurable Antenna for LTE and WLAN Applications

10.11591/ijece.v8i3.pp1893-1902
S. M. Shah , M. F. M. Daud , Z. Z. Abidin , F. C. Seman , S. A. Hamzah , N. Katiran , F. Zubir
Microstrip patch antennas are increasingly gaining popularity for usage in portable wireless system applications due to their light weight, low profile structure, low cost of production and robust nature. The patch is generally made of a conducting material such as copper or gold and can take any possible shapes, but rectangular shapes are generally used to simplify analysis and performance prediction. Microstrip patch antenna radiates due to the fringing fields between the patch edge and ground plane. In this work, a frequency reconfigurable antenna with a BAR63-02V Positive-Intrinsic-Negative (PIN) diode is designed, simulated and fabricated. The antenna operates at 2.686GHz for Long-Term Evolution (LTE2500) and 5.164GHz for Wireless Local Area Network (WLAN) applications. In the OFF state, the antenna operates at 5.302GHz, which is also suitable for WLAN application. The proposed antenna is fabricated on a FR-4 substrate with a relative dielectric constant, εr of 4.5, thickness, h of 1.6mm and loss tangent, tan δ of 0.019. The fabrication process is carried out at the Advanced Printed Circuit Board (PCB) Design Laboratory in UTHM.
Volume: 8
Issue: 3
Page: 1893-1902
Publish at: 2018-06-01

Computationally Efficient Multi-Antenna Techniques for Multi-User Two-Way Wireless Relay Networks

10.11591/ijece.v8i3.pp1684-1691
Samer Alabed
In this work, we are interested in implementing, developing and evaluating multi-antenna techniques used for multi-user two-way wireless relay networks that provide a good tradeoff between the computational complexity and performance in terms of symbol error rate and achievable data rate. In particular, a variety of newly multi-antenna techniques is proposed and studied. Some techniques based on orthogonal projection enjoy low computational complexity. However, the performance penalty associated with them is high. Other techniques based on maximum likelihood strategy enjoy high performance, however, they suffer from very high computational complexity. The Other techniques based on randomization strategy provide a good trade-off between the computational complexity and performance where they enjoy low computational complexity with almost the same performance as compared to the techniques based on maximum likelihood strategy.
Volume: 8
Issue: 3
Page: 1684-1691
Publish at: 2018-06-01

Maximum Power Point Tracking of Wind Turbine Conversion Chain Variable Speed Based on DFIG

10.11591/ijpeds.v9.i2.pp527-535
H. Becheri , I. K. Bousarhanne , A. Harrouz , H. Glaoui , T. Belbekri
Wind energy has many advantages, it does not pollute and it is an inexhaustible source. However, the cost of this energy is still too high to compete with traditional fossil sources. The yield of a wind turbine depends on three parameters: the power of the wind, the turbine power curve and the ability of the generator to respond to fluctuations in the wind. This article presented the MPPT of a wind turbine system equipped with an asynchronous generator has dual power under MatlabSimulink program, in the first time we simulated all the conversion chain with complete model of DFIG and vector control in second stepthen applied the extracted maximum power MPPT strategists, this command is effective and has several advantages it offered to kept the maximum power delivered to network despite all the parameter is change.
Volume: 9
Issue: 2
Page: 527-535
Publish at: 2018-06-01

Optimal Power System Planning with Renewable DGs with Reactive Power Consideration

10.11591/ijpeds.v9.i2.pp750-756
Hanumesh T. , Sudarshana Reddy H.R
This paper analyses the optimal power system planning with DGs used as real and reactive power compensator. Recently planning of DG placement reactive power compensation are the major problems in distribution system. As the requirement in the power is more the DG placement becomes important. When planned to make the DG placement, cost analysis becomes as a major concern. And if the DGs operate as reactive power compensator it is most helpful in power quality maintenance. So, this paper deals with the optimal power system planning with renewable DGs which can be used as a reactive power compensators. The problem is formulated and solved using popular meta-heuristic techniques called cuckoo search algorithm (CSA) and particle swarm optimization (PSO). the comparative results are presented.
Volume: 9
Issue: 2
Page: 750-756
Publish at: 2018-06-01

The Fact-Finding Security Examination in NFC-enabled Mobile Payment System

10.11591/ijece.v8i3.pp1774-1780
Pinki Prakash Vishwakarma , Amiya Kumar Tripathy , Srikanth Vemuru
Contactless payments devised for NFC technology are gaining popularity. Howbeit, with NFC technology permeating concerns about arising security threats and risks to lessen mobile payments is vital. The security analysis of NFC-enabled mobile payment system is precariously imperative due to its widespread ratification. In mobile payments security is a prevalent concern by virtue of the financial value at stave. This paper assays the security of NFC based mobile payment system. It discusses the security requirements, threats and attacks that could occur in mobile payment system and the countermeasures to be taken to secure pursuance suitability.
Volume: 8
Issue: 3
Page: 1774-1780
Publish at: 2018-06-01
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