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29,922 Article Results

A new multilevel inverter topology based on switched-capacitor technique

10.11591/ijpeds.v12.i1.pp627-636
Saifullah Kakar , S. M. Ayob , M. Saad Bin Arif , N.M. Nordin , Z. Daud , R. Ayop
This paper presents a new multilevel inverter based on the switched-capacitor technique. The topology aims for renewable energy and fuel cell applications that demand high magnitude output ac voltage. This configuration of the inverter can produce a total of thirteen voltage levels using a single DC source. The topology features voltage boosting with a triple gain of the input voltage source without utilizing a boost DC-DC converter. Furthermore, the voltages of the capacitors are self-balanced at any desired voltage level during each cycle. Therefore, auxiliary circuits are no longer needed. A comparative study of the presented inverter with the classical topologies and recently introduced topologies has been done in power switches, driver circuits, blocking voltage of the switches, and boosting the input voltage. A simple fundamental switching scheme is applied to the proposed topology to validate the viability of the topology.
Volume: 12
Issue: 1
Page: 627-636
Publish at: 2021-03-01

Improved hybrid algorithm based on GA and local search method for asymmetrical 9-level inverter

10.11591/ijeecs.v21.i3.pp1309-1316
Rim Feyrouz Abdelgoui , Rachid Taleb , Abderrahim Bentaallah , Fayçal Chabni
Selective Harmonic elimination has emerged as an in-depth research method to replace traditional PWM technology. This study demonstrates the selective harmonic elimination by using a hybrid Genetic algorithm GA and local search (GA-LS) method of a uniform asymmetric multilevel inverter called USAMI That removes the higher-order harmonics defined while maintaining the fundamental voltage needed. This new technology can be implemented at any USAMI level. For example, in this article, we plan to use USAMI at 9 levels and find the optimal switching angle to remove the 5th, 7th, and 11th harmonics.
Volume: 21
Issue: 3
Page: 1309-1316
Publish at: 2021-03-01

Augmented robust T-S fuzzy control based PMSG wind turbine improved with H∞ performance

10.11591/ijpeds.v12.i1.pp585-596
Naoual Tidjani , Abderrezak Guessoum
In this paper, an improved augmented Takagi-Sugeno fuzzy control design applied to the system of converting wind turbine energy was proposed. The wind generator used is based on a permanent magnet synchronous wind power generator (PMSG) under varying operation of the wind speed. The proposed T-S fuzzy control strategy aims to maximize wind energy in low wind speed. A part of our contribution lies in the limitation of the power output of the wind generator in high wind speed. Through the concept of the virtual desired variables, the design of the output tracking controller is achieved. In light of this concept, the developed T-S fuzzy control was designed via parallel-distributed compensation (PDC) approach with H∞ performance.Sufficient conditions for the stability of the closed-loop system affected by external disturbances are proved from Lyapunov’s direct method and the feedback gains of the controller strategy are determined by linear matrix inequalities (LMIs) tools. Another contribution is in showing the robustness of the Takagi-Sugeno based control strategy, with a focus on a set of system parameters with model uncertainties. The simulation results show the high performance of the proposed controller strategy for a 5MW (PMSG) obtained through simulation.
Volume: 12
Issue: 1
Page: 585-596
Publish at: 2021-03-01

A fast and robust reference current generation algorithm for three-phase shunt active power filter

10.11591/ijpeds.v12.i1.pp121-129
Zakaria Chedjara , Ahmed Massoum , Patrice Wira , Ahmed Safa , Abdelmadjid Gouichiche
The identification of the reference currents constitutes an important part of the control of the active power filter. This part requires an accurate estimation of the frequency, phase, and proper extraction of the load current harmonics. This makes the modeling more difficult and requests a rigorous selection of techniques to be used. For the sake of simplicity, the direct method is motivated by the need for the simplicity and flexibility than the existing techniques such as the instantaneous power theory and diphase currents method. However, this method requires a robust phase-locked loop to extract the unity voltages and a robust controller to estimate the magnitude of the source current. To this end, this paper proposes the hybrid phase-locked loop (HPLL) as a good option mainly because 1) it achieves zero phase error under frequency drifts, 2) Fast dynamic response, 3) totally block the DC offset, 4) From the control point of view, it is a type 1 control system which results in high stability margin. To the best of authors’ knowledge, the HPLL has not been used in active power filter yet. Furthermore, a neural PI regulator is used to estimate the magnitude of the source current. Simulation results show the efficiency of the proposed technique and illustrate all its interesting features. For the sake of comparison, the proposed method is compared to other advanced techniques.
Volume: 12
Issue: 1
Page: 121-129
Publish at: 2021-03-01

Ubiquitous learning in occupational health and safety for vocational education

10.11591/ijere.v10i1.20823
Ketut Ima Ismara , Amin Suharjono , Didi Supriadi
This research aimed to develop instructional media for occupational safety and health android-based for vocational schools. The second aim is to determine the feasibility of instructional media and student responses. The type of research is research and development (R&D) with the Analysis, Design, Development, Implementation, Evaluation (ADDIE) method, namely, analysis, design, development, implementation, and evaluation. The instrument used for data collection was a questionnaire with fourth scales. Data collection used an assessment questionnaire for two experts and 103 users. Research data analysis techniques used quantitative descriptive analysis. This study's results have produced products in the form of android-based instructional media for Occupational Safety and Health. In this study, we designed and developed an application called Zerosicks for mobile devices to help students learn occupational safety and health principles. The results of testing for all features and navigation work well and under their functions. The assessment results by content experts, media experts, and students as users indicate that this media has a very decent level of eligibility. Suggestions for product development are to add videos to the media, provide selected music, and add discussion forums for users.
Volume: 10
Issue: 1
Page: 285-292
Publish at: 2021-03-01

Crucial problems in arranged the lesson plan of vocational teacher

10.11591/ijere.v10i1.20604
Muhammad Nurtanto , Nur Kholifah , Alias Masek , Putu Sudira , Achmad Samsudin
This study aimed to explore the implementation of the 2013 curriculum in vocational schools, Banten in terms of the readiness and quality of the learning tools that have been prepared. A total of 957 respondents from 2017 to 2018, consisting of four cities and three districts in Banten Province were involved in the training and mentoring program, namely vocational teachers and vice-principals in the curriculum field. Data were collected using questionnaire sheets, FGD notes, and observation check dates. The data obtained are analyzed and interpreted based on the specified categories. The results showed that: 1) Teacher readiness for learning tools in the components a) Core Competencies (CC) and Basic Competencies (BC) analysis of 45.31%, b) Program mapping of 38.37%, learning plan preparation of 39.45% and c) Learning evaluation of 36.78%; 2) The quality of lesson plan (LP) the science lesson plan analysis instrument (SLPAI) based is divided into two groups. The category "Quality" in the instructional program and instructional plan aspects, and the category "Moderate" in the instructional media and assessment and others aspects; and 3) The difficulty of learning device components, including authentic assessment, use of methods, literacy approaches, and lesson planning. The implementation of training, mentoring, and supervision programs are adjusted to the experience of vocational teachers taking into account the teacher's involvement in the implementation of the curriculum, age, and school readiness.
Volume: 10
Issue: 1
Page: 345-354
Publish at: 2021-03-01

Key exchange based on Diffie-Hellman protocol and image registration

10.11591/ijeecs.v21.i3.pp1751-1758
Rachid Rimani , Naima Hadj Said , Adda Ali Pacha , Ozen Ozer
Nowadays, with the advences in ICT and rapid development of mobile internet; media information shared on the various communication networks requires the existence of adequate security measures. Cryptography becoming an effective way to meet these requirements and for maintain the confidentiality. However, communicating with encrypted messages requires secret key exchange, which is a part of a complex protocol. In this paper, we propose a new method for exchanging key based on Diffie-Hellman protocol and image registration with fast fourier transform, the principle of this method consists to concealing the key in a set of transformed images. Therefore, image registration allows finding transformations between images, which become a tool for recovering the key by the receiver.
Volume: 21
Issue: 3
Page: 1751-1758
Publish at: 2021-03-01

Uncertainty and sensitivity analysis applied to a voltage series operational amplifier

10.11591/ijeecs.v21.i3.pp1347-1355
Mohammad Nizam Ibrahim , Zainal Hisham Che Soh , Nor Shahanim Mohamad Hadis , Ali Othman
This paper investigates the applied uncertainty and sensitivity analysis to resistors used in voltage series operational amplifier circuit. Two resistors bands are considered which are the gold band (5% uncertainty) and the silver band (10% uncertainty). To generate resistors uncertainty sample points, the SIMLAB uncertainty and sensitivity tool is used. A total of  sample points based on Sobol’ technique has been created for each resistor band. The voltage series amplifier is modelled in MATLAB/Simulink. A MATLAB script has been written to execute Monte-Carlo simulations for reading the resistor sample points, updating and executing the voltage series model and finally calculating the voltage gain. The result of uncertainty analysis shows that the produced voltage gain is uncertain within the range of  for the gold band and  for the silver band with respect to a reference voltage gain. The result of sensitivity analysis shows that each resistor, although their values are different, contributes equally contribution to the uncertainty of voltage gain.
Volume: 21
Issue: 3
Page: 1347-1355
Publish at: 2021-03-01

Design of energy-efficient multiplier based on 3:2 compressor

10.11591/ijra.v10i1.pp51-58
Inamul Hussain , Saurabh Chaudhury
A multiplier circuit is one of the most important functional blocks of many nano-electronic, control and automation applications. In this work, an energy-efficient multiplier is reported based on a 3:2 compressor. The multiplier has been designed in three different parts. In the first part, a partial product (PP) generator is used. In the second part, the partial products are reduced which is termed as PPP (partial product processing). Whereas in the third step final addition is performed. PPs are produced by using AND gates. The PPP is designed in two-phase. In the first phase, the Wallace tree logarithm has been used to reduce the PPs. Whereas, in the second phase the PPs are reduced by using energy-efficient half adder and 3:2 compressor. At last, in the third step, by using a carry-save adder final addition has been computed. The performance analysis of the designed multiplier is evaluated and compared with other multiplier circuits. The multiplier shows performance improvements by 20.55%-46% for the power supply variation from 1.2 V to 0.6 V. All the simulations and analyses have been carried out by using the Synopsys EDA tool.
Volume: 10
Issue: 1
Page: 51-58
Publish at: 2021-03-01

Internet of Things-based home automation, energy management and smart security system

10.11591/ijra.v10i1.pp32-40
U. I. Bature , N. M. Tahir , A. K. Abubakar , A. Makama
Objects can easily be remotely sensed, monitored and controlled when home is automated using the Internet of Things (IoT); this will give room for direct integration of the real world into computerized systems. Energy consumption is defined as the degree of the amount of power expended by a given load in an electric circuit. Nowadays, inefficient techniques used in monitoring and control of power consuming devices has contributed immensely in the high rate of power consumption in our homes, institutions, business places, and marketplaces. The design and implementation of an IoT-based home automation, energy management and smart security system has been proposed in this paper. The components used in the development of the system unit include an ESP8266 Wi-Fi component and the universal Arduino imbedded controller. The proposed scheme is aimed at assisting and supporting an efficient usage of power, and by doing so, power consumption as well as the risk of fire outbreaks will be greatly reduced to the barest minimal. The capability of remotely monitoring and controlling both electrical and electronic appliances via a web application is the main feature of the proposed scheme. The scheme provides better efficiency and accuracy as well as economic benefits.
Volume: 10
Issue: 1
Page: 32-40
Publish at: 2021-03-01

Finite element analysis on permeability of cut-off wall for landfill

10.11591/ijra.v10i1.pp59-67
Guozhong Dai , Jiajing Xu , Shujin Li , Xiongwei Li , Guicai Shi , Weicheng Shi
Finite element method is an efficient numerical calculation method based on information technology, which can be used to solve complex equations in various problems. At present, the finite element method is mainly used to deal with seepage problems in dams, while there is less study on seepage in landfill. In this paper, finite element method is used to analyze the seepage of cut-off wall of a landfill in Jiangsu Province, and the movement of landfill leachate in cut-off wall under different conditions is simulated. The simulation results show that The cut-off wall can effectively slow down the seepage velocity of leachate; Under different conditions, the maximum gradient of the cut-off wall are 18.68 and 13.84 respectively, which conforms to Chinese national standard. Therefore, the design of cut-off wall is safe and reasonable, and filtration erosion will not occur; This simulation method combined with information technology can provide new solutions and ideas for other projects to verify safety and rationality.
Volume: 10
Issue: 1
Page: 59-67
Publish at: 2021-03-01

Virtual machine migration in MEC based artificial intelligence technique

10.11591/ijai.v10.i1.pp244-252
Ali OUACHA , Mohamed EL Ghmary
The whole world is inundated with smaller devices equipped with wireless communication interfaces. At the same time, the amount of data generated by these devices is becoming more important. The smaller size of these devices has the disadvantage of being short of processing and storage resources (memory, processes, energy,...), especially when it needs to process larger amounts of data. In order to overcome this weakness and process massive data, devices must help each other. A low-resource node can delegate the execution of a set of computionly heavy tasks to another machine in the network to process them for it. The machine with sufficient computational resources must also deposit the appropriate environment represented by the adapted virtual machine. Thus, in this paper, in order to migrate the virtual machine to an edge server in a mobile edge computing environment, we have proposed an approach based on artificial intelligence. More specifically, the main idea of this paper is to cut a virtual machine into several small pieces and then send them to an appropriate target node (Edge Server) using the ant colony algorithm. In order to test and prove the effectiveness of our approach, several simulations are made by NS3. The obtained results show that our approach is well adapted to mobile environments.
Volume: 10
Issue: 1
Page: 244-252
Publish at: 2021-03-01

Portable wireless node design for smart agricultural system based on Internet of Things

10.11591/ijra.v10i1.pp1-9
Adnan Rafi Al Tahtawi , Erick Andika , Wildan Nurfauzan Harjanto
This paper presents a pair of portable wireless nodes for a smart agricultural system to control and monitor the agricultural parameters based on Internet of Things (IoT). This system utilizes low-cost wireless communication through an nRF24L01 module between the sensor node and the controller node. The sensor node is placed on the agricultural area with a Li-Ion battery as a power supply, while the controller node is placed at the control and monitoring station. On the sensor node, there is a YL-69 soil moisture sensor and DS18B20 temperature sensor, while in the controller node there is a relay that can set watering on/off condition. In the controller node, there is also an ESP8266 WiFi module that serves to send data to the internet cloud for user monitoring. Both hardware nodes are built in small and portable size. The experimental result shows that the sensor node can transmit soil moisture and temperature data via RF wireless communication to the controller node. Watering is done automatically based on the condition of sensor values. In addition, this system can also be monitored through a website interface, so the users can easily find out the condition of their plant as long as there is internet access.
Volume: 10
Issue: 1
Page: 1-9
Publish at: 2021-03-01

Design and implementation of automatic painting mobile robot

10.11591/ijra.v10i1.pp68-74
Amgad Muneer , Zhan Dairabayev
Wall painting is a repetitive, stressful, and hazardous process that makes it an ideal automation case. In the automotive industry, painting had been automated but not yet for the construction industry. However, there is a strong need for a mobile robot that can move to paint residential interior walls. In this study, we aim to design and implement an automatic painting mobile robot. The conceptual design of the proposed wall painting robot consisting paint mechanism with a spray gun and ultrasonic sensor. The spray gun is attached to a pulley mechanism that has linear motion. The ultrasonic sensor is used to detect the spray gun when it reached a certain limit. The DC motor rotates clockwise and counterclockwise based on the ultrasonic sensor condition made. The experimental results indicate that the robot was able to paint the walls smoothly vertically, and horizontally. The spraying gun structure's speed is at a tolerable speed of 0.07 m/s, which could be increased, but to provide high-quality painting without any gaps, the current speed was selected as the most suitable, without any harm to the working process.
Volume: 10
Issue: 1
Page: 68-74
Publish at: 2021-03-01

Future trends in mechatronics

10.11591/ijra.v10i1.pp24-31
Chiebuka T. Nnodim , Micheal O. Arowolo , Blessing D. Agboola , Roseline O. Ogundokun , Moses K. Abiodun
Presently, the move towards a more complex and multidisciplinary system development is increasingly important in order to understand and strengthen engineering approaches for the systems in the engineering field. This will lead to the effective and successful management of these systems. The scientific developments in computer engineering, simulation and modeling, electromechanical motion tools, power electronics, computers and informatics, micro-electro-mechanical systems (MEMS), microprocessors, and distributed system platforms (DSPs) have brought new challenges to industry and academia. Important aspects of designing advanced mechatronic products include modeling, simulation, analysis, virtual prototyping, and visualization. Competition on a global market includes the adaptation of new technology to produce better, cheaper, and smarter, scalable, multifunctional goods. Since the application area for developing such systems is very broad, including, for example, automotive, aeronautics, robotics or consumer products, and much more, there is also the need for flexible and adaptable methods to develop such systems. These dynamic interdisciplinary systems are called mechatronic systems, which refer to a system that possess synergistic integration of Software, electronic, and mechanical systems. To approach the complexity inherent in the aspects of the discipline, different methods and techniques of development and integration are coming from the disciplines involved. This paper will provide a brief review of the history, current developments and the future trends of mechatronics in general view.
Volume: 10
Issue: 1
Page: 24-31
Publish at: 2021-03-01
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