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27,860 Article Results

Harmonic Effects Analysis of Electronic Loads Controller On Self Excited Induction Generator (SEIG) Operations

10.11591/ijeecs.v8.i2.pp273-280
Refdinal Nazir , Andi Pawawoi , Riska Amalia
The aplication of Electonic Load Controller (ELC) on Self-Excited Induction Generator (SEIG) driven by renewable energy sources creates harmonic issues. This paper has analyzed the propagation of the harmonic current generated by the ELC in the generator system. Mathematical modeling and computer simulation is used to analyze the propagation of harmonic currents generated by ELC on the generator system. Laboratory testing has also been conducted to justify the simulation results. The study results showed that the propagation harmonic currents created by ELC on the stator widings of SEIG and main load side are rejected for high order components, and attenuated for lower order components. Consequently, the THDI of stator and main load current will be reduced significantly.
Volume: 8
Issue: 2
Page: 273-280
Publish at: 2017-11-01

PSS Based Angle Stability Improvement Using Whale Optimization Approach

10.11591/ijeecs.v8.i2.pp382-390
N. A. M. Kamari , I. Musirin , Z. Othman , S. A. Halim
This paper introduced a new swarm based optimization technique for tuning Power System Stabilizer (PSS) that attached to a synchronous generator in a single machine infinite bus (SMIB) system. PSS which is installed with Lead-Lag (LL) controller is introduced to elevate the damping capability of the generator in the low frequency mode. For tuning PSS-LL parameters, a new technique called Whale Optimization Algorithm (WOA) is proposed. This method mimics the social behavior of humpback whales which is characterized by their bubble-net hunting strategy in order to enhance the quality of the solution. Based on eigenvalues and damping ratio results, it is confirmed that the proposed technique is more efficient than Particle Swarm Optimization (PSO) and Evolutionary Programming (EP) in improving the angle stability of the system. Comparison between WOA, PSO and EP optimization techniques showed that the proposed computation approach give better solution and faster computation time.
Volume: 8
Issue: 2
Page: 382-390
Publish at: 2017-11-01

Optimization of Food Composition for Hypertensive Patient using Variable Neighborhood Search

10.11591/ijeecs.v8.i2.pp327-334
Aprilia Nur Fauziyah , Wayan Firdaus Mahmudy
Hypertension is a major symptom that cause other diseases appear such as non-communicable diseases, cancer, and diabetes if the nutrients on hypertensive patients not controlled from the actual nutrition need. One of healthy life effort for the patients is consuming healthy food that considers level of salt in the foods. The problem to determine the food composition that considers level of salt and minimum cost of the food is solved using Variable Neighborhood Search. This study compares 3 neighborhood structures: insertion, exchange, and 2-opt. The use of 2-opt neighborhood structure gives the highest fitness averages of other neighborhood structure. Selection and arrangement of neighborhood structure in every k neighborhood have effect on the solution is obtained. The result of this study contains composition of foods with nutrients which are close to the needs of hypertension patients with attentions the sodium and minimal cost within a day.
Volume: 8
Issue: 2
Page: 327-334
Publish at: 2017-11-01

Obstacle detection technique using multi sensor integration for small unmanned aerial vehicle

10.11591/ijeecs.v8.i2.pp441-449
Muhammad Faiz Bin Ramli , Syariful Syafiq Shamsudin , Ari Legowo
Achieving a robust obstacle detection system for small UAV is very challenging. Due to size and weight constraints, very limited detection sensors can be equipped in the system. Prior works focused on a single sensing device which is either camera or range sensors based. However, these sensors have their own advantages and disadvantages in detecting the appearance of the obstacles. In this paper, combination of both sensors based is proposed for a small UAV obstacle detection system. A small Lidar sensor is used as the initial detector and queue for image capturing by the camera. Next, SURF algorithm is applied to find the obstacle sizes estimation by searching the connecting feature points in the image frame. Finally, safe avoidance path for UAV is determined through the exterior feature points from the estimated width of the obstacle. The proposed method was evaluated by conducting experiments in real time with indoor environment. In the experiment conducted, we successfully detect and determine a safe avoidance path for the UAV on 6 different sizes and textures of the obstacles including textureless obstacles.
Volume: 8
Issue: 2
Page: 441-449
Publish at: 2017-11-01

Cryptanalysis on Privacy-aware two-factor Authentication Protocol for Wireless Sensor Networks

10.11591/ijeecs.v8.i2.pp296-301
Younsung Choi
Das first proposed two-factor authentication combining the smart card and password to resolve the security problems of wireless sensor networks (WSNs). After that, various researchers studied two-factor authentication suitable for WSNs. In user authentication protocols based on the symmetric key approach, a number of elliptic curve cryptography (ECC)-based authentication protocols have been proposed. To resolve the security and efficiency problems of ECC-based two-factor authentication protocols, Jiang et al. proposed a privacy-aware two-factor authentication protocol based on ECC for WSNs. However, this paper performs a vulnerability analysis on Jiang et al.’s authentication protocol and shows that it has security problems, such as a lack of mutual authentication, a risk of SID modification and DoS attacks, a lack of sensor anonymity, and weak ID anonymity.
Volume: 8
Issue: 2
Page: 296-301
Publish at: 2017-11-01

The Non-Destructive Test Method as A Simple Way to Evaluate the Quality Of Metal Core Pcbs for High Power Micro-Assemblies

10.11591/ijeecs.v8.i2.pp281-286
A.V. Sukhanov , A.I Artemova , R.S Litvinenko
The article describes the necessity of an incoming quality control of the delivered power electronics elements especially at the stage of choosing a reliable supplier. In particular, in the field of the metal core PCBs production, there is a need to control not only its heat sink parameters, but also to control the quality of the joint interface of the metal core PCBs. Since the use of poor-quality materials or the violation of the technological process by the manufacturer can lead to the defects in the PCBs structure. Thus it can affect the heat sink efficiency and the reliability of the entire assembly. The article proposes and describes the method of nondestructive incoming quality control of metal core PCBs. This method is based on the use of ultrasonic layer-by-layer scanning for obtaining the internal structure of PCBs. The article presents the results of applying this method for the PCBs of various manufacturers. The data of the structure visualization and the influence of environment temperatures changes were also obtained. The result pictures of the tested samples before and after the thermal circling were obtained to study the possible degradation of the PCBs structure and its parameters.
Volume: 8
Issue: 2
Page: 281-286
Publish at: 2017-11-01

Remotely Operated Submarine Vehicle Control Using Fuzzy Logic

10.11591/ijeecs.v8.i2.pp582-585
P. Palanichamy
Submerged marine investigation still remains a puzzle. The motivation behind this paper is to address the issues in plan and improvement of submerged vehicles with hindrance shirking and moving help for administrator in marine condition utilizing fluffy rationale controller. A symmetrical, practical and little measured submerged Remotely Operated Vehicle (ROV) with three thrusters is intended for testing control calculation and execution of framework. Kinematics of the ROV is produced relating rate of revolution of thrusters with ROV'S straight and precise increasing speed. A near investigation of the framework's reaction for basic if-else rationale and with fluffy rationale controller for route is made and assessed. A Graphical User Interface (GUI) with live bolster is given to the administrator to more extensive scope of visual perception of submerged condition and navigational guide.
Volume: 8
Issue: 2
Page: 582-585
Publish at: 2017-11-01

Performance Analysis of HRO-B+ Scheme for the Nested Mobile Networks using OPNet

10.11591/ijeecs.v8.i2.pp522-532
Shayma Senan , Aisha Hassan A. Hashim
As a demand of accessing Internet is increasing dramatically, host mobility becomes insufficient to fulfill these requirements. However, to overcome this limitation, network mobility has been introduced. One of its implementation is NEMO Basic Support protocol which is proposed by Internet Engineering Task Force (IETF). In NEMO, one or more Mobile Router(s) manages the mobility of the network in a way that its nodes would be unaware of their movement. Although, it provides several advantages, it lacks many drawbacks in term of route optimization especially when multiple nested mobile networks are formed. This paper presents a new hierarchical route optimization scheme for nested mobile networks using Advanced Binding Update List (BUL+), which is called HRO-B+. From performance evaluation, it shows that this scheme performs better in terms of throughput, delay, response time, and traffic, and achieves optimal routing.
Volume: 8
Issue: 2
Page: 522-532
Publish at: 2017-11-01

Online Performance Monitoring of Grid-Connected Photovoltaic System using Hybrid Improved Fast Evolutionary Programming and Artificial Neural Network

10.11591/ijeecs.v8.i2.pp399-406
Puteri Nor Ashikin Megat Yunus , Shahril Irwan Sulaiman , Ahmad Maliki Omar
This paper presents the development of online performance monitoring methods for grid-connected photovoltaic (GCPV) system based on hybrid Improved Fast Evolutionary Programming and Artificial Neural Network (IFEP-ANN). The approach has been developed and validated using previous predicted data measurement. Solar radiation (SR), module temperature (MT) and ambient temperature (AT) has been employed as the inputs, and AC output power (PAC) as the sole output to the neural network model. The actual data from the server has been called and uploaded every five minute interval into Matlab by using FTP (File Transfer Protocol) and the predicted AC output power has been produced based on the prediction developed in the training stages. It is then compared with the actual AC output power by using Average Test Ratio, AR. Any predicted AC output power less than the threshold set up, indicates an error has been occurred in the system. The obtained results show that the hybrid IFEP-ANN gives good performance by producing a sufficiently high correlation coefficient, R value of 0.9885. Besides, the proposed technique can analyse and monitor the system in online mode. 
Volume: 8
Issue: 2
Page: 399-406
Publish at: 2017-11-01

Evaluation of Protective Relaying Reliability in Renewable Energy Environment

10.11591/ijeecs.v8.i2.pp407-413
Z. Hisham , H. Hashim , Z. Shukri , Z. Ishak
The decrement in supply of fossil fuel led to the exploration of new energy sources, which varies from wind energy to solar energy, which are known as Renewable Energy. The main problem with these power sources are the inconsistency of their energy that depends very much on the environmental factors. The embedment of these power sources onto conventional power transmission network would affect the sensitivity and reliability of protective relaying. Two different types of solar power plant connection to power system network are presented in this paper, namely Bus Connection and T-Off Connection. Computer Aided Protection Engineering (CAPE) software is used to model the networks being protected by distance protection, and simulate short circuit scenario. This paper specifically focuses on evaluating the impact of the in-feed current being contributed by both network configurations to the reliability of distance protection.
Volume: 8
Issue: 2
Page: 407-413
Publish at: 2017-11-01

Analysis and Measurement of Wave Guides Using Poisson Method

10.11591/ijeecs.v8.i2.pp546-548
M. Sudha , A. Kumaravel
The Poisson equation is used to analyze and measure the waveguide in quick and exact calculation of Green's capacity. For this reason, Green's capacity is composed as far as Jacobian elliptic capacities including complex contentions. Another calculation for the quick and precise assessment of such Green's capacity is definite. The principle advantage of this calculation is effectively appeared inside the casing of the Limit Integral Resonant Mode Expansion technique, where a generous decrease of the computational exertion identified with the assessment of the referred to Green's capacity is gotten.
Volume: 8
Issue: 2
Page: 546-548
Publish at: 2017-11-01

Design of a Small Renewable Resource Model based on the Stirling Engine with Alpha and Beta Configurations

10.11591/ijeecs.v8.i2.pp360-367
Faisal Zahari , Muhammad Murtadha Othman , Ismail Musirin , Amirul Asyraf Mohd Kamaruzaman , Nur Ashida Salim , Bibi Norasiqin Sheikh Rahimullah
This paper presents the conceptual design of Stirling engine based Alpha and Beta configurations. The performances of Stirling engine based Beta configuration will be expounded elaborately in the discussion. The Stirling engines are durable in its operation that requires less maintenance cost.  The methodology for both configurations consists of thermodynamic formulation of Stirling Cycle, Schmidt theory and few composition of flywheel and Ross-Yoke dimension. Customarily, the Stirling engine based Beta configuration will operate during the occurrence of low and high temperature differences emanating from any type of waste heat energy. A straightforward analysis on the performance of Stirling engine based Beta configuration has been performed corresponding to the temperature variation of cooling agent. The results have shown that the temperature variation of cooling agent has a direct effect on the performances of Stirling engine in terms of its speed, voltage and output power. 
Volume: 8
Issue: 2
Page: 360-367
Publish at: 2017-11-01

Real Time Application of Fourier Transforms

10.11591/ijeecs.v8.i2.pp574-577
S. S.Shenbaga Ezhil
In recent days increasing the use of Fourier transform in various applications. The Fourier transform is the simplest among the other transformation method. It is less time consuming, used in power distribution system, mechanical system, industry and wireless network. Mainly in power distribution system the mitigation of power quality disturbance require fast, accuracy and high noise immune method. In the Fourier Transform (FT) area, the advancements of oversampling, computerized sifting and clamor molding are generally received for smothering the quantization commotion. The powerful quantize bits of an ADC are enhanced in view of these techniques. In any case, when preparing the wideband signs for example, linear frequency modulation flag, these strategies can't get viable results, and need high testing rate.
Volume: 8
Issue: 2
Page: 574-577
Publish at: 2017-11-01

Dual-Wavelength Thulium Ytterbium Co-Doped Fiber Laser

10.11591/ijeecs.v8.i2.pp457-461
Hazlihan Haris , Ahmad Razif Muhammad , Norazlina Saidin , Mohd Shahnan Zainal Abidin , Hamzah Arof , Mukul Chandra Paul , Sulaiman Wadi Harun
We report on the generation of dual-wavelength fiber laser peaking at 1990.64 and 1998.92 nm with a simple ring cavity setup. The lasers are demonstrated using a fabricated silica-based nano-engineered octagonal shaped double-clad Thulium-Ytterbium co-doped fiber (TYDF) as a gain medium in a simple all-fiber ring configuration. By using 980 nm multimode laser, a stable dual-wavelength laser is generated at a threshold pump power of 1500 mW due to the non-polarization rotation (NPR) effect occurred in the cavity. The effect has been self-controlled by a suppression of mode competition in the gain medium. The result shows that the slope efficiency of the generated dual–wavelength laser is measured to be 27.23%. This dual-wavelength TYDF laser operated steadily at room temperature with a 34 dB optical signal-to-noise ratio. Keywords: Dual-wavelength fiber laser, nano-engineered glass, silica-based TYDF, NPR effect.
Volume: 8
Issue: 2
Page: 457-461
Publish at: 2017-11-01

Development of Approximate Prediction Model for 3-DOF Helicopter and Benchmarking with Existing Controllers

10.11591/ijeecs.v8.i2.pp502-510
Farhat Anwar , Rounakul Islam Boby , Hasmah Mansor , Sabahat Hussain , Afsah Sharmin
Recent trend of living is getting modernized rapidly by the involvement of automatic systems. Within the aviation industry, automatic systems had become heavily reliable by the end of the nineteen centuries. The systems usually require controllable devices with desired control algorithm known as controller. Controllers can be replaced with, almost every mechanical automation aspect where, safety is a serious issue. But it is not easy to adapt a controller with a specific model at the beginning. It is important to predict the model before a controller works on the model and the controller parameters need to be adapted to get maximum efficiency. A 3-DOF (Three Degrees of Freedom) airframe model is an advanced benchmark model of real 3-DOF helicopter. It has the same uncommon model dynamics with nonlinearities, strong duel motor cross coupling system, uncertain characteristics, disturbances dependent, unmodeled dynamics and many more. The 3-DOF airframe model is a well-known platform for controller performance benchmarking. This research paper shows the development of an approximate prediction model of a Three Degrees of Freedom helicopter model and uses the proposed approximate model to observe the performance of an existent hybrid controller. The hybrid controller is the combination of two different controllers named Quantitative Feedback Theory (QFT) controller and Adaptive controller. To achieve the research objective, the proposed mathematical model of this airframe was used to develop transfer function and simulate with the hybrid controller in MATLAB. The performance of the controller based on the proposed heliframe model of 3-DOF helicopter have also been reported added within this paper.
Volume: 8
Issue: 2
Page: 502-510
Publish at: 2017-11-01
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