1,720,961 research outputs found
Perancangan Alat Peraga Turbin Angin Sumbu Vertikal Untuk Mata Kuliah EBT
Get PDFTurbin angin sumbu vertikal (TASV) adalah salah satu pembangkit listrik, yang mengubah energi angin
menjadi energi listrik. Proses konversi energi terjadi ketika energi angin yang diterima oleh turbin angin
sumbu vertikal diubah menjadi energi kinetik. Energi kinetik tersebut kemudian akan diubah menjadi
energi listrik oleh generator DC. Dengan begitu energi listrik dapat dibangkitkan dari energi angin yang
terbarukan. Terdapat dua jenis TASV yang dirancang untuk menerima enrgi angin dari Variable Wind Hand
Blower dan menghasilkan energi listrik untuk menyalakan beban lampu LED 2V dengan arus 3,5 mA. Pada
perancangan ini, proses konversi energi dapat dibuktikan oleh rancangan alat peraga TASV. Transfer daya
maksimum generator DC terjadi ketika besar hambatan luar senilai dengan hambatan dalam generator DC.
Efisiensi daya maksimal TASV bernilai 0,03%. Dengan adanya rancang bangun ini, diharapkan dapat
membantu mahasiswa memahami karakteristik TASV dalam mata kuliah EBT.The vertical axis wind turbine (VAWT) is one of the power plants, which converts wind energy into
electrical energy. The energy conversion process occurs when the wind energy received by a vertical axis
wind turbine is converted into kinetic energy. The kinetic energy will then be converted into electrical
energy by a DC generator. That way electrical energy can be generated from renewable wind energy. There
are two types of VAWT designed to receive wind energy from a Variable Wind Hand Blower and generate
electrical energy to power a 2V LED with 3,5 mA of current. In this design, the energy conversion process
can be proven by VAWT props designs. The maximum power transfer of a DC generator occurs when the
external resistance is equal to the resistance in the DC generator. The maximum power efficiency is 0,03%.
With this design, it is hoped that it can help students understand the characteristics of TASV in Renewable
Energy courses
Perancangan Pintu Gerbang Terkendali Telepon Pintar
Get PDFSelama ini pintu gerbang rumah kebanyakan masih dilakukan secara manual untuk membuka dan menutupnya. Ketika akan memasukkan mobil biasanya pengendara akan turun dari mobil untuk membuka gerbang, apa lagi ketika cuaca hujan akan sangat merepotkan. Dan juga dengan tingginya angka kriminalitas, sistem keamanan rumah juga harus ditingkatkan. Mesin gerbang yang beredar di pasaran umumnya masih menggunakan remote yang jangkauan dan perangkatnya terbatas, selain itu harganya cukup mahal. Maka pada perancangan ini akan dibuat sebuah sistem pintu gerbang dengan harga yang lebih terjangkau dan dapat dikendalikan menggunakan aplikasi Android, jadi setiap orang di rumah dapat mengendalikan di manapun selama ada koneksi internet. Mesin gerbang ini menggunakan motor AC 1 fasa yang dihubungkan dengan relay supaya dapat dikontrol arah putarnya, dan terdapat sensor ultrasonic sebagai proteksi. Mikrokontroller yang digunakan yaitu NodeMCU ESP8266 karena dapat terkoneksi dengan wifi, dan dihubungkan dengan firebase dupaya dapat dikendalikan melalui aplikasi pada smartphone. Dari hasil pengujian perangkat ini berfungsi dengan baik. Pintu gerbang dapat dibuka tutup melalui perintah aplikasi, sensor juga dapat mendeteksi halangan dan menghentikan gerbang saat menutup.So far, most house gates are still operated manually to open and close them. When entering the car, the driver usually gets out of the car to open the gate, especially when it rains, thus it will be very inconvenient. And also with the high crime rate, the home security system must also be improved. Gate machines on the market generally still use remotes with limited range and devices, besides that the price is quite expensive. So in this study, a gate system is made at a more affordable price and can be controlled using an Android application, so everyone at home can control anywhere as long as there is an internet connection. This gate machine uses a single phase AC motor which is connected to a relay so that it can be controlled in the direction of rotation, and there is an ultrasonic sensor for protection. The microcontroller used is NodeMCU ESP8266 because it can be connected via Wi-Fi, and connected to firebase so that it can be controlled via an application on a smartphone. From the test results this device is functioning properly. The gate can be opened and closed via application commands, sensors can also detect obstacles and stop the gate when it is closing
Perancangan Antena Mikrostrip Lingkaran Multilayer Parasitic pada Frekuensi WLAN (Wireless Local Area Network) 5,8 GHz
Get PDFIn this paper, an antenna being designed was a microstrip antenna with a circular patch working on the 5,8 GHz WLAN (Wireless Local Area Network) frequency with additions of multilayer parasitic and DGS techniques. The use of the first technique aims to improve antenna gain. Meanwhile, the use of the second method intends to reduce surface waves which can decrease antenna performance. The designed and simulated antenna has 3 layers. The rectangular DGS technique is placed at the main layer along with an antenna power supply. In addition, an end-parasitic layer is located under the main layer which consists of ground and a substrate without the patch. Then, a front-parasitic layer is positioned above the main layer which consists of the substrate and patch only without the ground. This antenna was designed with copper ground that has a width of 0,035 mm, FR-4 Epoxy substrate with a width of 1,6 mm, and a relative permittivity value of 4,6. In accordance with the simulation result, the designed antenna has worked in the frequency which ranges from 5, 33 GHz – 6,08 GHz, the resulted bandwidth of 750 MHz, the VSWR value of 1,114, the return loss value of -25,337 dB, and the gain value of 6,61 dB. Furthermore, based on the measurement result, the designed and fabricated antenna which functions in the frequency varying from 5,498 GHz – 5,981 GHz, the VSWR value of 1,268, and the return loss value of -18,523 dB has the bandwidth of 483 MHz, and the gain value of 7,47 dB
Alat Pemantau dan Pengendali Lahan Pertanian Menggunakan Perangkat IoT Long Range (LoRa)
Get PDFThe agriculture sector is one of the fields which is an important resource of people's lives. Human needs originating from agriculture are very complex and include basic needs in terms of food, industrial raw materials, energy sources and for environmental management. The field of agriculture that is very important for people's lives makes the field of agriculture should receive special attention. But agricultural productivity is still far from expectations. One of the factors causing the lack of agricultural productivity is human resources that are still low in processing agricultural land and the results. The majority of farmers in Indonesia use a manual system in processing agricultural land. In this design what will be measured and displayed on the monitoring function are temperature and humidity, soil moisture, wind speed, wind direction, and rainfall intensity, as well as the controller function using a relay as an actuator. In this tool used Long Range (LoRa) an Internet of Things (IoT) device to be placed on a large agricultural area and as the main controller is the Arduino Mega 2560 microcontroller. The data obtained is sent using the LoRaWAN (Long Range Wide Area Network) platform, namely The Things Network (TTN) and displayed on the Cayenne MyDevice website which can be viewed on a PC or smart phone with the Cayenne application. This tool is equipped with a 18650 battery with a capacity of 5000mAh with solar panel power sources. Even the control system can work automatically by setting triggers from the data used on Cayenne. data stored on Cayenne can be downloaded and opened in txt or microsoft excel format to make analysis on agriculture
Rancang Bangun Sistem Pemantau Kualitas Air Berbasis IoT
Get PDFAir merupakan sumber daya alam yang memiliki fungsi sangat penting bagi kehidupan mahluk hidup khususnya dalam memenuhi kebutuhan hidup manusia. Air bersih yang layak dikonsumsi adalah air yang memenuhi persyaratan yang diatur pada Peraturan Menteri Kesehatan Republik Indonesia Nomor 32 tahun 2017 tentang Standar Baku Mutu Kesehatan Lingkungan dan Persyaratan Kesehatan Air untuk keperluan Higiene Sanitasi. Penentuan kualitas air dengan menggunakan metode konvensional masih dilakukan secara manual dengan cara mengambil sampel lalu mengklasifikasikan sampel dan menganalisa satu persatu data sampel pengujian sehingga membutuhkan waktu yang lama dan tidak efektif. Perkembangan teknologi mikrokontroler dan teknologi informasi seperti sistem pendukung keputusan, dapat memberikan solusi bagi pengguna dalam membantu proses pengambilan keputusan yang terkait dengan penentuan kualitas air. Oleh karena itu dalam tugas akhir ini,diberikan solusi dengan merancang sistem ‘smart’ monitoring kualitas air yang bekerja secara realtime agar bisa diakses kapanpun dan dimanapun. Proses analisa kualitas air dilakukan dengan Fuzzy Logic Controller. Parameter input yang dibutuhkan adalah nilai pH, Turbidity atau kekeruhan, dan TDS (Total dissolved solids) atau zat padat terlarut. Metode Fuzzy Logic Controller digunakan untuk menetukan kualitas air kedalam tiga kelas yaitu memenuhi baku mutu (kondisi baik), biasa, dan buruk (tercemar). Perancangan sistem ini menggunakan Arduino Mega 2560 yang digunakan sebagai mikrokontroler serta sensor analog DFRobot pH meter, sensor analog DFRobot TDS, dan sensor Turbidity DFRobot.Water is a natural resource that has a very important function for the life of living things, especially in meeting the needs of human life. Clean water that is fit for consumption is water that meets the requirements stipulated in the Regulation of the Minister of Health of the Republic of Indonesia number 32 of 2017 concerning Environmental Health Standard Quality Standards and Water Health Requirements for the needs of Sanitary Hygiene. Determination of water quality using conventional methods is still done manually by taking samples then classifying samples and analyzing one by one the test sample data so it requires a long time and is not effective. The development of microcontroller technology and information technology such as decision making support systems, can be provide solutions for users in helping the decision making process related to determining water quality. Therefore, in this thesis, a solution is provided by designing a 'smart' water quality monitoring system that works in real time that can be accessed anytime, anywhere. The water quality analysis process is carried out with a Fuzzy Logic Controller. Parameters input needed are pH,Turbidity or TDS (Total Dissolved Solids). Fuzzy Logic Controller method used to determine the quality of water into three classes, which meet the quality standards (good condition), ordinary, and bad (polluted). The design of this system uses Arduino Mega 2560 which is used as a microcontroller and DFRobot pH meter analog sensor, DFRobot TDS analog sensor, and Turbidity DFRobot sensor
Optimized PID-Like Neural Network Controller for Single-Objective Systems
Get PDFThe utilization of intelligent controllers becomes more prevalent as the hype of Industry 4.0 arises. Artificial neural network (ANN) exhibits the mapping ability and can estimate the output by means of either interpolation or extrapolation. These properties are sought to supersede the classical controllers. In this study, the ANN establishment was initiated by collecting dataset from the input and output of a well-known PID controller. The dataset was trained using a set of control factor combinations, including the number of neurons, the number of hidden layers, activation functions, and learning rates. Two kinds of ANN controllers were investigated, including one-input and three-input ANN. The testing was conducted under normal and uncertain conditions. These uncertainties include external disturbances, plant variations, and setpoint variations. The integral absolute error (IAE) was selected as the single objective to assess. The simulation results show that the response of three-input ANN controllers could yield smaller IAE at their best combinations under most kinds of conditions. Besides, the three-input ANN outperforms the one-input ANN both qualitatively and quantitatively. These facts might lead to a broader utilization of ANN as controllers
A Fuzzy Logic-Based Automation toward Intelligent Air Conditioning Systems
Get PDFMost of the energy used in residential buildings originates from air conditioners. Meanwhile, air conditioner manufacturers are addressing this issue by the production of efficient air conditioners. However, the convertible frequency air conditioners are expensive, up to 60% higher than the fixed frequency control air conditioners. Besides the human behavior in determining the temperature, setpoint plays an important role regardless of the air conditioners technology used. This study incorporated intelligence in setting up the temperature by means of specially designed remote control. The Tsukamoto fuzzy reasoning was utilized as a decision making system with two inputs, namely the outdoor temperature and the number of occupants. The device used DHT22 as the temperature sensor and HC-SR04 to detect incoming and outgoing occupants. Furthermore, the fuzzy inference system generated infrared signal associated with the temperature setpoint. This signal was received by the air conditioner receiver to adjust the temperature setpoint accordingly. The result of this study showed that the fuzzy inference system determines the temperature setpoint appropriately under variations of surrounding temperature and the number of occupants. The proposed approach yielded a satisfactory perception of thermal comfort and also a promising approach to energy conservation
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
- …
