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28,451 Article Results

Designing of Dynamic Re-clustering Leach Protocol for Calculating Total Residual Time and Performance

10.11591/ijece.v7i3.pp1286-1292
Syed Umar , Yerragudipadu Subbarayudu , K. Kiran Kumar , N. Bashwanth
Wireless sensor networks (WSN), a plurality of sensors in an energy limited deliveries. the sensors are arranged randomly for many applications. Thus, the battery Or download a replacement would be practical. Therefore, the energy efficient routing protocol to expand the network. In this article we propose a new cluster based Re-Leach dynamic Protocol Dynamic Reclustering based Leach protocol (DR-Leach), the expansion of the lattice energy consumption and reduce the age. The idea is that the energy cluster leaders  next production cluster to balance In each round, the same number of nodes in the network of life. Make your first calculation It calculates the optimum amount of CHS in each round, and the optimum amount for each cluster. The results showed that the improvement of reliability protocols proposed frame and the total energy consumption than BCDCP Leach and protocols.
Volume: 7
Issue: 3
Page: 1286-1292
Publish at: 2017-06-01

Efficient Approach to LVRT Capability of DFIG-Based Wind Turbines under Symmetrical and Asymmetrical Voltage Dips Using Dynamic Voltage Restorer

10.11591/ijpeds.v8.i2.pp945-956
Kiarash Azizi , Murtaza Farsadi , Mohammad Farhadi Kangarlu
The capability of low-voltage ride-through (LVRT) of doubly fed induction generator (DFIG) has been considered as an essence for grid code requirements. Any unbalance on the grid side causes the rotor current of the generator to rise which leads to saturate the dc-link of the back-to-back converter or even destroy it. To meet this requirement, a dynamic voltage restorer (DVR) without dc-link energy storage elements is utilized to compensate any disturbance imposed to the DFIG wind turbine system. On the time of any disturbance or fault, DFIG and DVR are properly controlled in order to compensate the specified faulty phase uninterruptedly. DVR is connected in series to the grid and by injecting instantaneous compensating voltage, prevents the stator voltage from rapid changing; consequently, the rotor side converter can accomplish its normal operation. As voltage dips are the most common grid faults subjected to DFIGs, this paper investigates both symmetrical and asymmetrical voltage dips caused by grid faults. The independent and instantaneous phase voltage compensation, less volume, weight, and cost are the merits to utilize the proposed DVR along with DFIG wind turbines. PSCAD/EMTDC based simulations verifies the capabilities of the proposed technique for the LVRT capability of DFIG.
Volume: 8
Issue: 2
Page: 945-956
Publish at: 2017-06-01

Enhanced Position Control for Pneumatic System by Applying Constraints in MPC Algorithm

10.11591/ijece.v7i3.pp1633-1642
Siti Fatimaah Sulaiman , M.F. Rahmat , A.A.M. Faudzi , Khairuddin Osman , Sy Najib Sy Salim , S.I. Samsudin , A.R. Azira
This paper demonstrates the effectiveness of applying constraints in a controller algorithm as a strategy to enhance the pneumatic actuator system’s positioning performance. The aim of the present study is to reduce the overshoot in the pneumatic actuator positioning system’s response. An autoregressive with exogenous input (ARX) model structure has been used to model the pneumatic system, while a model predictive control (MPC) has been employed as a control strategy. The input constraint has been applied to the control signals (on/off valves signals) to ensure accurate position tracking. Results show that the strategy with constraint effectively reduced overshoot by more than 99.0837 % and 97.0596 % in simulation and real-time experiments, respectively. Moreover, the performance of the proposed strategy in controlling the pneumatic positioning system is considered good enough under various loads. The proposed strategy can be applied in any industry that used pneumatic actuator in their applications, especially in industries that involved with position control such as in manufacturing, automation and robotics. The strategy proved to be capable of controlling the pneumatic system better, especially in the real-time environment.
Volume: 7
Issue: 3
Page: 1633-1642
Publish at: 2017-06-01

Adaptive Sliding Mode Control of PMLSM Drive

10.11591/ijpeds.v8.i2.pp639-646
Maamar Yahiaoui , Abderrahmane Kechich , Ismail Khalil Bouserhane
In this paper, we propose a study by software MATLAB/Simulink of the adaptive nonlinear controller of permanent magnet linear synchronous machine. The lumped uncertainties due for saturation magnetic and temperature and distribution load effects in performances of the system control. To resolve this problem the sliding mode controller is designed with estimator of load force by MRAS method the simulation results prove clearly the robustness of controlling law and estimator method.
Volume: 8
Issue: 2
Page: 639-646
Publish at: 2017-06-01

Analysis, Design and Investigation on a New Single-Phase Switched Quasi Z-Source Inverter for Photovoltaic Application

10.11591/ijpeds.v8.i2.pp853-860
C. Bharatiraja , P. Sanjeevikumar , Aganti Mahes , Ayushi Saxena , K. Padmapriya , B. K. Mithra , AS Swathimala , S. Raghu
This paper addresses the approach to improve the efficiency of the quasi  Z-source inverter. In order to increase the efficiency the reduction of conduction losses is one way to approach. Sequentially to decrease the conduction losses in the quasi z-source inverter the replacement of diode is replacing with switches is proposed which is also called as synchronous rectification. The paper represents basics of the approach, analysis  and comparison of the power losses of the traditional and proposed designs of the grid connected PV-system with quasi z-source inverter system. The proposed approach validated on the computer simulations in the MATLAB environment.
Volume: 8
Issue: 2
Page: 853-860
Publish at: 2017-06-01

Channel Loss Estimation and Test of Ultra-Wideband Propagation from 2 to 10 GHz Application

10.11591/ijeecs.v6.i3.pp663-670
Lei Gao , Qun Chen
This paper deals with the channel loss models of ultra-wideband radio wave propagation from 2 to 10 GHz application. IEEE 802.15.4a and Okumura channel loss reference models have been introduced and the estimation methods of channel transmission loss have been discussed with the environments of 2 to 10 GHz short range application. The channel transmission loss was measured in ZigBee circuit with 2 kinds of power, using IEEE 802.15.4a and Okumura channel model to estimate the theoretical channel loss, the theoretical value and the actual measured value were compared and analyzed. The analysis shows that the error between the calculated value and the actual measured value of the IEEE 802.15.4a reference model is small in the ultra-wideband ZigBee channel environment, and the error of the Okumura channel loss model is large. The results show that in the environments of 2 to 10 GHz short range application, IEEE 802.15.4a channel loss model is a high precision reference model for the ultra-wideband channel loss calculation.
Volume: 6
Issue: 3
Page: 663-670
Publish at: 2017-06-01

Application of PST Source based DC Link Restoration for IDVR

10.11591/ijece.v7i3.pp1103-1111
Ramchandra Nittala , Alivelu Parimi , K Uma Rao
Interline Dynamic Voltage Restorer (IDVR) comprises of several Dynamic Voltage Restorers (DVRs) connected to different distribution feeders in the power system sharing common energy storage. One of the DVR provides for voltage sag compensation appearing in that feeder, while the other DVRs restore the energy in the common dc-link thus dynamically maintaining the voltage of DC link capacitor constant by importing power from the other feeders. Restoration of the DC link energy plays an important role in the capability of the individual DVR in the IDVR to mitigate deep sags with long durations. In this paper the restoration of the DC link energy of the IDVR is achieved by the utilizing the phase shifting transformers (PST) which assist the respective DVR during its power control mode. A controlled switching action is provided to choose the appropriate connection of PST to the feeders depending upon the voltage sag condition. The proposed novel concept is examined in a test power system with IDVR.
Volume: 7
Issue: 3
Page: 1103-1111
Publish at: 2017-06-01

Optimization of Energy Aware Path Routing Protocol in Wireless Sensor Networks

10.11591/ijece.v7i3.pp1268-1277
M. Naga Vamsi Krishna , N. Sai Harsha , K.V.D Kiran , Gandharba Swain
Strength conservation is one of the biggest challenges to the successful WSNs since the tiny  very limited resource nodes  such as energy, memory space| as well as communication and computation capabilities. the sensors are unattended Implemented  and battery recharge is almost impossible. So  many investigations have be done in redirecting energy efficient algorithms or protocols for WSNs. Our reasons behinds the study of number is based on the following three aspects. Initially of all First, we see That immediate transmittal is employed under small scale while multi-hop network transmittal network is employed under mass. All of us want to find the Which factors influence the transmittal manner. Second, it is Commonly That multi-hop agree transmitting more energy efficient than Usually transmitting When the average solitary source to destination distance is large. Yet ,}how to look for the optimal hop number in order That the overall energy consumption is  nominal is not well  tackled. Third, the hot location phenomenon the networking lifetime influences directly. After that all of us recommend to Optimization of energy aware routing path (OEAPR) algorithm, Which incorporate the overall routing mechanism With hop-based direction-finding nature During process in WSNs.
Volume: 7
Issue: 3
Page: 1268-1277
Publish at: 2017-06-01

Programming Learning Requirements Based on Multi Perspectives

10.11591/ijece.v7i3.pp1299-1307
Firas Layth Khaleel , Noraidah Sahari Ashaari , Tengku Siti Meriam Tengku Wook , Amirah Ismail
Students occasionally find it difficult to learn new programming languages. They often confront unfamiliar programming terms and having difficulty to visualize the processes that happen in computer memory. Weak students find this a burden and end up memorizing the processes without understanding them and their workings. This situation invariably leads students to obtain low grades in their programming subjects. The preliminary investigation of survey was produce in previous work; the results showed that students have experienced ineffective learning, lack of interest towards this course and lack of motivation. Therefore, the main objective of this study is to identify programming learning requirements based on previous work and verified from two perspectives (experts and students). Finally, the result was a group of requirements that should be considered in programming language course
Volume: 7
Issue: 3
Page: 1299-1307
Publish at: 2017-06-01

Modified Look-Up Table for Enhancement of Torque Response in Direct Torque Controlled Induction Machine

10.11591/ijpeds.v8.i2.pp522-533
Goh Wee Yen , Nik Rumzi Nik Idris , Auzani Jidin , Tole Sutikno
Basically, the direct torque control (DTC) drive system is operated at light load. At light load, supplying the drive system with rated flux will decrease the efficiency of the system. To maximize the efficiency of drive system, an optimal flux has been applied during steady-state but when a torque is suddenly needed, for example during acceleration, the dynamic of the torque response would be degraded. Therefore, a modification to the voltage vector as well as look-up table has been proposed for the torque response improvement. The proposed voltage vector is generated by adding two adjacent conventional voltage vectors and implemented by using duty ratio. The duty ratio is used to estimate the activation time of each conventional voltage vector in order to produce the proposed voltage vector.
Volume: 8
Issue: 2
Page: 522-533
Publish at: 2017-06-01

A PWM Strategies for Diode Assisted NPC-MLI to Obtain Maximum Voltage Gain for EV Application

10.11591/ijpeds.v8.i2.pp767-774
C. Bharatiraja , Shri Harish , J L Munda , P. Sanjeevikumar , M. Sriram Kumar , Vivek Bhati
The projected diode assisted Neutral Point Diode Clamed (NPC-MLI) with the photovoltaic system produces a maximum voltage gain that is comparatively higher than those of other boost conversion techniques. This paper mainly explores vector selection approach pulse-width modulation (PWM) strategies for diode-assisted NPC-MLI to obtain a maximum voltage gain without compromising in waveform quality. To obtain a high voltage gain maximum utilization of dc-link voltage and stress on the power switches must be reduced. From the above issues in the diode assisted NPC-MLI leads to vector selection approach PWM technique to perform capacitive charging in parallel and discharging in series to obtain maximum voltage gain. The operation principle and the relationship of voltage gain versus voltage boost duty ratio and switching device voltage stress versus voltage gain are theoretically investigated in detail. Owing to better performance, diode-assisted NPC-MLI is more promising and competitive topology for wide range dc/ac power conversion in a renewable energy application. Furthermore, theoretically investigated are validated via simulation and experimental results.
Volume: 8
Issue: 2
Page: 767-774
Publish at: 2017-06-01

Frequency Reconfigurable Epsilon Negative Metamaterial Antenna

10.11591/ijece.v7i3.pp1473-1479
Arrauzah Razak , M. K. A. Rahim , H. A. Majid , N. A. Murad
This paper proposes metamaterial (MTM) inspired frequency reconfigurable antenna based on thecircular electric field coupled (ELC) resonator. It is composed of circular shape ELC resonator with the radius size of 7 mm. By inserting two switches between the gaps at both side of the circular ELC resonator, it is possible to switch ON or OFF the unit cell. The antenna has been simulated using CST Microwave Studio software tool. The simulation result shows that the proposed antenna is capable of reconfiguring between two different frequencies which are2.18 GHz and 2.64 GHz. The simulated bandwidth at -10 dB is 4.12 % at resonance frequency of 2.18 GHz and 8.7% at 2.64 GHz
Volume: 7
Issue: 3
Page: 1473-1479
Publish at: 2017-06-01

Face Recognition Using Completed Local Ternary Pattern (CLTP) Texture Descriptor

10.11591/ijece.v7i3.pp1594-1601
Taha H. Rassem , Nasrin M. Makbol , Sam Yin Yee
Nowadays, face recognition becomes one of the important topics in the computer vision and image processing area. This is due to its importance where can be used in many applications. The main key in the face recognition is how to extract distinguishable features from the image to perform high recognition accuracy.  Local binary pattern (LBP) and many of its variants used as texture features in many of face recognition systems. Although LBP performed well in many fields, it is sensitive to noise, and different patterns of LBP may classify into the same class that reduces its discriminating property. Completed Local Ternary Pattern (CLTP) is one of the new proposed texture features to overcome the drawbacks of the LBP. The CLTP outperformed LBP and some of its variants in many fields such as texture, scene, and event image classification.  In this study, we study and investigate the performance of CLTP operator for face recognition task. The Japanese Female Facial Expression (JAFFE), and FEI face databases are used in the experiments. In the experimental results, CLTP outperformed some previous texture descriptors and achieves higher classification rate for face recognition task which has reached up 99.38% and 85.22% in JAFFE and FEI, respectively.
Volume: 7
Issue: 3
Page: 1594-1601
Publish at: 2017-06-01

Buck Converter Control for Lead Acid Battery Charger using Peak Current Mode

10.11591/ijpeds.v8.i2.pp686-694
Asep Nugroho , Estiko Rijanto , Latif Rozaqi
DC-DC buck converters are used for battery chargers in many applications including renewable energy sources, inverters, electric vehicles and robots. In this paper a buck converter was built and its controller was developed using peak current control mode for current loop and phase lag for voltage loop. This paper proposes a formulation of plant disturbance due to load variation to obtain a nominal model based on small signal approach. The controller was derived analytically based on the nominal model. Experiment results show that the buck control system functions well in regulating the output voltage. During the start up without any load it can reduce input voltage from 300 V to output voltage of 133.9 V in 19.3 ms. The developed controller can maintain the output voltage under load variation from no load to sudden load of 0.26 A. When it was implemented to charge a lead acid battery string, constant current of 3.36 A was charged in the first 173 minutes followed by constant voltage of 134.7 V until the end of charging at time 483 minutes. Thus, the developed control system of lead acid battery charger works well.
Volume: 8
Issue: 2
Page: 686-694
Publish at: 2017-06-01

Risk of Transient Stability Using Rotor Trajectory Index as Severity Function

10.11591/ijeecs.v6.i3.pp591-601
Elmotaz Billa Elghali , Marayati Marsadek , Agileswari K. Ramasamy
This paper presents a new approach to determine the risk of transient stability. It describes the implementation of rotor trajectory index (RTI) to assess the severity of power systems when it is subjected to a three-phase fault. The (RTI) is proposed as an index used to represent severity of transient instability. Risk of transient stability for three-phase fault is calculated using a well-known risk formula. Risk of transient stability provides a quantitative measure to evaluate the potential loss of synchronism of a generator that takes into account the probability and consequences. RTI index is calculated based on the machines rotor angles obtained at each step of a time domain simulation. RTI is proposed as an index to show the severity of the three-phase fault towards transient stability since it allows a fast and accurate measurement of the degree of stability of the system facing a fault. The proposed technique is implemented on the IEEE 39-bus system.
Volume: 6
Issue: 3
Page: 591-601
Publish at: 2017-06-01
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