2018 2nd International Conference on Applied Electromagnetic Technology (AEMT)最新文献

{"title":"Research Opportunities of LoRaWAN for Internet of Things Implementation","authors":"Irsan Taufik Ali, R. F. Sari","doi":"10.1109/AEMT.2018.8572427","DOIUrl":"https://doi.org/10.1109/AEMT.2018.8572427","url":null,"abstract":"In the development of the world of the Internet of Things (IoT), a technology that offers a wide range with low power consumption or known as Low Power Wide Area (LPWA) technology, is the best choice today. One of the most popular technologies is LoRaWAN. This technology is most widely used in IoT implementation because it has advantages in the range of connectivity, low power consumption with very large network capacity and simple network management. LoRa's technology received a lot of attention in the last few years. Along with the increasing needs and complexity of problems faced in IoT market, some obstacles in the implementation of these technologies. This case identified provides an overview of LoRa technology in various implementation cases, as well as the advantages, limitations, opportunities and challenges for future research. LoRa can be considered as a good candidate in solving the complexity of the problems in the development of IoT in the next future.","PeriodicalId":371263,"journal":{"name":"2018 2nd International Conference on Applied Electromagnetic Technology (AEMT)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130085540","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimization of Grid Antenna 2.4 GHz Using Grid Reflector and Yagi Antenna's Feed Modification","authors":"Cahyo Muvianto, Pahrurrozi, Suthami Ariessaputra, Sareh Malekpour","doi":"10.1109/AEMT.2018.8572325","DOIUrl":"https://doi.org/10.1109/AEMT.2018.8572325","url":null,"abstract":"The Wi-Fi parabolic grid is the best long range antenna for point to point or point to multi point links. The parabolic grid has a very high gain and a very narrow beamwidth which makes it a favorite antenna for such applications. However, it is possible to increase the antenna parameter such as gain and beam pattern. The excellent front-to-back ratio helps to reduce unwanted interference. The purpose of this work is to investigate how the arrangement of feeding antennas can affect the parabolic grid antenna performance. The optimization has been performed analytically and numerically using CST simulation via re-arranging different types of reflectors and feeding points. Simulation process helps to determine the type of the reflector and the feeding point that produce higher gain and a high-grade beam pattern. Afterwards, fabrication the design and measuring the antenna are the following steps. The reflector modifications include the changes in the number of the grid segments, and adding a solid material at the center of the reflector. The feed point modification uses five elements yagi antennas. The measurement results of the reflector and feed point optimization has improved the gain parameter from 24 dBi to 26.02 dBi for normal grid parabolic Wi-Fi antennas. The radiation pattern is directional with a beamwidth of 7° in horizontal polarization and a beamwidth of 18° in vertical polarization while the obtained antenna bandwidth is about 57 MHz.","PeriodicalId":371263,"journal":{"name":"2018 2nd International Conference on Applied Electromagnetic Technology (AEMT)","volume":"34 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123363222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimization of Reactive Power and Voltage Control in Power System Using Hybrid Artificial Neural Network and Particle Swarm Optimization","authors":"Sabhan Kanata, G. H. Sianipar, N. Maulidevi","doi":"10.1109/AEMT.2018.8572408","DOIUrl":"https://doi.org/10.1109/AEMT.2018.8572408","url":null,"abstract":"Optimization of reactive power and voltage control to minimalize the active power loss in the power system becomes one of the important aspects in order to improve the power system quality as a solution in determining the precise value of control variable. The optimization of managing control variable in this paper recommends the mix-method of the artificial neural network (ANN) as the starting initialization and time varying nonlinear particle swarm optimization (TVNL-PSO). This method is tested in the power system of IEEE-14 buses. The hybrid ANN - TVNL-PSO results 12.3609 MW of active power loss. The approach proposed is compared to previously used by the other researchers. The performance of the proposed approach indicates that it solves the problem better.","PeriodicalId":371263,"journal":{"name":"2018 2nd International Conference on Applied Electromagnetic Technology (AEMT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131236147","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Design of Indoor RTLS by Use of the UWB-WSN based Two Reference Points","authors":"Ardiansyah Musa, Hyojeong Han, Gde Dharma Nugraha, Deokjai Choi, Seung-Won Seo, Juseok Kim","doi":"10.1109/AEMT.2018.8572411","DOIUrl":"https://doi.org/10.1109/AEMT.2018.8572411","url":null,"abstract":"Among the solutions for indoor real-time locating systems (RTLS), the use of ultra-wide-band (UWB) ranging is indispensable. However, the common approach of the existing system in literature, require three or more reference points to determine the position of a tag. It will consume significant power and costly for the large-scale implementation. In this paper, we presented our initial work, a design of indoor RTLS by use of the UWB TOA-based algorithm with only two sensor nodes as the references from a set of 802.15.4a WSN positioning scheme. In order to determine the position of a tag, we selected the minimum distance between the initial tag position and estimated tag positions resulted in the intersection between two reference points. The evaluation shown root mean square error of estimation is about 12.79 cm and 22.26 cm within the R95 accuracy. It is shown that our approach is feasible to be implemented.","PeriodicalId":371263,"journal":{"name":"2018 2nd International Conference on Applied Electromagnetic Technology (AEMT)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114754753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A New Modulation Technique for A Three-Cell Single-Phase CHB Inverter with Un-Equal DC-Link Voltage for Improving Output Voltage Quality","authors":"I. Citarsa, I. N. Satiawan, Supriono","doi":"10.1109/AEMT.2018.8572358","DOIUrl":"https://doi.org/10.1109/AEMT.2018.8572358","url":null,"abstract":"This paper investigates a new modulation technique for a three-cell single-phase CHB (Cascaded H-Bridge) inverter with un-equal DC link voltage. The proposed PWM technique is verified using Matlab/Simulink. The applied DC-link voltages of inverter are 6 V, 12 V and 24 V respectively (DC-link voltage ratio of 1: 2: 4). The result is compared with the CHB inverter with equal DC-link voltage (using DC-link voltage of 12 Volt). The simulation results show that the output voltage using DC-link voltage ratio of 1: 2: 4 produces 15 levels DC voltage, while equal DC-link can only generate a 7 voltage levels. As the number of level in the output voltage increases, the quality of the voltage improves significantly. This is indicated by the reduction of THD percentage from 13.22% to 5.265% that can be seen from the harmonics spectrum of the three-cell CHB inverter using conventional and new PWM. The harmonics spectrum also shown that the output voltage of the three-cell CHB inverter using new PWM is almost free from harmonics, while using the conventional PWM, the 3rd, 5th and 7th harmonics and some higher harmonics are still appeared. Another indicator is carried out by comparing the percentage of low order harmonics content up to the 19th harmonic (950 Hz) of the output voltage. It is noted that there is a significant reduction of the low order harmonics from 3.25% to 0.518% achieved using the new PWM method. To sum up, the new modulation technique enables the inverter to produce better output voltage quality.","PeriodicalId":371263,"journal":{"name":"2018 2nd International Conference on Applied Electromagnetic Technology (AEMT)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128565482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Induced Current Simulation of One-Dimensional Vibrating Magnetic Granular Particles System","authors":"S. Viridi, Suprijadi","doi":"10.1109/AEMT.2018.8572401","DOIUrl":"https://doi.org/10.1109/AEMT.2018.8572401","url":null,"abstract":"Using a single loop solenoid motion of a magnetic granular particle is observed through its induced emf voltage, which is simulated using Faraday-Lenz induction law and model of magnetic dipole. Position of the loop is important, especially for this special case free fall and stationary base, where the maximum height is reduced in time. Some special moment, such as the particle reaching maximum height and hitting the base can be identified from the induce emf voltage curve.","PeriodicalId":371263,"journal":{"name":"2018 2nd International Conference on Applied Electromagnetic Technology (AEMT)","volume":"54 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120925962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sensorless Optimum Power Extraction for Small Scale Stand Alone Wind Turbine Based on Fuzzy Controller","authors":"R. I. Putri, F. Ronilaya, M. Rifa’i, L. Jasa, A. Priyadi, P. Mauridhi Hery","doi":"10.1109/AEMT.2018.8572368","DOIUrl":"https://doi.org/10.1109/AEMT.2018.8572368","url":null,"abstract":"The technology of wind turbines as electric power plants has developed very rapidly because renewable energy is environmentally friendly and has unlimited availability. The use of wind energy conversion systems for the grid non-connected areas has greatly benefits for the community, in which small scale standalone wind turbine systems are well suited to rural areas due to low investment costs and are easily controlled to improve efficiency. However, wind speed highly interfere the output power of the wind turbine. The efficiency of wind turbine can be improved by extracting the maximum power point to get optimal power. In this paper will propose an optimal power extraction control for small scale stand alone wind turbine using permanent magnet synchronous generator (PMSG) based on fuzzy logic controller (FLC) without mechanical sensors. Fuzzy logic determines the optimum power point through the duty cycle controlling on the dc/dc converter based on the uncontrolled rectifier output voltage and current. Based on the simulation results, FLC has better performance, where FLC can capture greater output power than perturb & observe (P&O) method. At wind speeds of 10 m/s, the use of FLC can extract wind power of 4200W while the P&O method is 3700W. In addition, FLC can extract optimum power to wind speeds variation and generate no oscillations.","PeriodicalId":371263,"journal":{"name":"2018 2nd International Conference on Applied Electromagnetic Technology (AEMT)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134078036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sunlight Intensity Measurement System with Solar Tracking System","authors":"I. G. E. W. Putra, I. K. P. Suniantara, I. Kumara","doi":"10.1109/AEMT.2018.8572444","DOIUrl":"https://doi.org/10.1109/AEMT.2018.8572444","url":null,"abstract":"Sunlight intensities are commonly measured by an acquisition device that is placed statically. At this way, we can't measure the sunlight intensity precisely all of the daylight. In this paper, using a solar tracking system with measurement device gives a precisely sunlight intensity from sunrise to sunset. With a low cost GY-302 module and an A6 GSM/GPRS module based on microcontroller Arduino Pro-Mini, the sunlight intensity measurement can be posted in a web server. The research also comparing the relationship between sunlight intensity and the solar panel generated voltage. As the results, beside the device can power itself independently by a solar panel, the posted data are plotted to be a sunlight intensity map. With this, a solar power plant development can be established in an appropriate area.","PeriodicalId":371263,"journal":{"name":"2018 2nd International Conference on Applied Electromagnetic Technology (AEMT)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124741235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Earth Magnetic Fields Evolution over Nusa Tenggara Region from Declination and Inclination Changes on Lombok Geomagnetic Observatory","authors":"Teti Zubaidah, Bulkis Kanata, Paniran, Misbahuddin, Rosmaliati, M. Yadnya, Susilawati Riskia","doi":"10.1109/AEMT.2018.8572475","DOIUrl":"https://doi.org/10.1109/AEMT.2018.8572475","url":null,"abstract":"Earth's magnetic field is a physical quantity that always changes both spatially and temporally. Its long-term change is closely related to internal mechanisms within the Earth's core, whereas changes in the medium-term may be related to events occurring in the Earth's crust. Continuous observations at many locations are needed to determine the magnitude and direction of the Earth's magnetic field. A geomagnetic observatory is an ideal means for conducting such observations, whereby its location is required to be very quiet in order to limit noise and interference (mainly due to human activities). On the island of Lombok, a geomagnetic observatory has been established in 2014 and it has produced high quality and continuous data since 2015. This paper (together with another paper presented in this conference) presents the results of observations of the Earth's magnetic field at the Lombok geomagnetic observatory during 3 (three) years of its initial operation. This paper specifically presents the results of declination and inclination measurements. The slowly changes in the values of declination and inclination are observed clearly, that the declination values changed by 0.0104°/yr (eastwards), while the inclination changed by 0.0467°/yr (downward). Compared to the IGRF-12 model, it shows unusual changes, which for this region declination should change by 0.0767°/yr (westward) and inclination by 0.1267°/yr (downward). The results of the observation provide clues that we have to pay more attention and scrutiny to the geomagnetic evolution over Nusa Tenggara region. Further continuous observations on the island of Lombok are necessary to confirm the tendency of declination and inclination changes, which will be most useful for integration with global observations (to know the evolution of the Earth's magnetic field, especially related to magnetic pole reversal), as well as with regional observations (to know the fluctuations of the Earth's magnetic field, especially related to earthquake precursors).","PeriodicalId":371263,"journal":{"name":"2018 2nd International Conference on Applied Electromagnetic Technology (AEMT)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129961581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Correlating Ground-Penetrating Radar Data with Geotechnical Data","authors":"W. Parnadi, W. Warsa, A. Laesanpura, Rizandi G. Parnadi, H. Asaue","doi":"10.1109/AEMT.2018.8572326","DOIUrl":"https://doi.org/10.1109/AEMT.2018.8572326","url":null,"abstract":"We investigated a significant correlation between Ground-Penetrating Radar (GPR) combined with down-hole seismic technique and geotechnical data (boring log and Standard Penetrating Test) to examine geophysical data as an important aid tool in interpreting geotechnical parameter. GPR data provide geotechnical engineers with continuous layering information, whereas down-hole seismic test (DHT) delivers geotechnical parameters such as Poisson's ratio $sigma$, Young Modulus E, Shear modulus and Bulk moduli. By combining these data with boring log and standard penetrating Test (SPT) data, a comprehensive estimation about geotechnical parameters can be achieved. We conducted GPR measurement with 100 MHz shielded antenna in two profiles (inline and cross-line) centered at a borehole. We conducted also SPT to measure soil strength and boring to know the lithology. Intensive examination reveals that GPR technique should be applied to extend the meaning of geotechnical parameter value around and between boreholes. From case study at ITB site, we found some interesting result. Whereas both GPR and down-hole seismic data can reveal hard soils with SPT value of more than 60 corresponding to silty sand, GPR data can detect the interface between silty clay and clayey silt layers that cannot be detected from SPT. This study reveal the potential use of GPR technique as a tool for investigation of subsurface that can be elaborated to the exploration of shallow coal seams in subsurface as well to that of valuable minerals.","PeriodicalId":371263,"journal":{"name":"2018 2nd International Conference on Applied Electromagnetic Technology (AEMT)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127194208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}