1,721,031 research outputs found
Optimisasi Sistem Kontrol Kecepatan Motor BLDC Berbasis Aritificial Intelligence
No full textMotor Brushless Direct Current (BLDC) telah banyak digunakan dalam dunia industri transportasi, salah satunya sebagai penggerak kendaraan sepeda listrik. Aspek penting dalam bagian penggerak motor BLDC sepeda listrik adalah kontrol kecepatan. Sistem kontrol kecepatan diimplementasikan untuk mengurangi sumber gangguan yang muncul, sehingga mempengaruhi kecepatan dan kestabilan. Indikator kestabilan adalah berkurangnya error steady state dan meningkatnya respon transient. Tujuan penelitian ini adalah melakukan optimisasi pada sistem kontrol kecepatan motor BLDC yang digunakan sebagai bagian penggerak sepeda listrik dengan menggunakan beberapa metodologi kontrol modern.
Metodologi yang digunakan dalam penelitian ini adalah melakukan pemodelan matematika motor BLDC melalui identifikasi sistem sehingga didapatkan fungsi alih. Identifikasi sistem yang digunakan untuk mendapatkan fungsi alih ini yaitu struktur model Auto Regressive Exogenous (ARX). Setelah didapatkan model matematika dalam bentuk fungsi alih, dilakukan optimisasi dengan menggunakan kontrol cerdas berbasis artificial intelligence. Algoritma artificial intelligence yang diusulkan dalam penelitian ini adalah algoritma modifikasi firefly, kemudian hasilnya dibandingkan dengan algoritma Particle Swarm Optimization (PSO Algorithm), dan fuzzy logic.
Berdasarkan hasil pengukuran dan simulasi, diperoleh beberapa hasil penelitian, pertama persamaan matematika motor BLDC dalam bentuk fungsi alih. Hasil kedua adalah nilai respon transien untuk optimisasi menggunakan algoritma modifikasi firefly ketika disimulasikan pada sistem kontrol kecepatan motor BLDC yaitu pada saat tidak ada beban, nilai rise timenya adalah 0.009931 detik, nilai settling time 0.984 detik, dan nilai overshoot 0.654%. Sedangkan pada saat diberi beban nilai respon transien yang diperoleh adalah rise time 0.0126 detik, settling time 0.0563 detik, dan nilai overshoot 0.396 %. Sedangkan untuk nilai performansi ITAE nya sebesar 3.3352e+06.
Keywords : Motor BLDC, Identifikasi Sistem, PID, Fuzzy Logic, Algoritma PSO, Modifikasi Algoritma Firefly.
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Brushless Direct Current (BLDC) motors are widely used in the transportation industry, one of which is to drive electric bicycles. An important aspect of the driving part of the BLDC electric bike is speed control. A speed control system is implemented to reduce the source of the disturbance that appears, thus affecting speed and stability. Stability can be obtained by designing the right controller to be applied to the BLDC motor plant. Not every BLDC motor plant available on the market, the manufacturer provides several mechanical and electronic parameters. The purpose of this research is to optimize the BLDC motor speed control system that is used as a driving part of an electric bicycle using several modern control methodologies to increase stability indicators, such as the value of rise-time, settling time, and reduce overshoot values.
The methodology used in this research is to perform mathematical modeling of the BLDC motor through system identification to obtain the transfer function. The system identification is used to obtain this transfer function as the Auto Regressive Exogenous (ARX) model structure. After getting a mathematical model in the form of a transfer function, optimization carried out using intelligent control based on artificial intelligence. The artificial intelligence algorithm proposed in this study is the modified firefly algorithm, then the results are compared with the Particle Swarm Optimization (PSO Algorithm) algorithm and fuzzy logic.
Based on the results of measurement and simulation, several research results obtained, first the BLDC motor mathematical equation in the form of a transfer function. The second result is the transient response value for optimization using the modified firefly algorithm when simulated on a BLDC motor speed control system, namely, when there is no load, the rise time value is 0.009931 seconds, the settling time value is 0.984 seconds, and the overshoot value is 0.654%. Meanwhile, when given a load, the transient response values obtained were a rise time of 0.0126 seconds, settling time 0.0563 seconds, and an overshoot value of 0.396%. Meanwhile, the ITAE performance value is 3.3352e + 06.
Keywords : BLDC Motor, System Identification, PID, Fuzzy Logic, PSO algorithm PSO, Modified Firefly Algorith
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Full text link“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
Design of Papaya Fruit Ripeness Detection Toll Based on the Colour of the Fruit Skin Based on Arduino : Rancang Bangun Alat Deteksi Kematangan Buah Pepaya Berdasarkan Warna pada Kulit Buah Berbasis Arduino
No full textThis research aims to design and build a papaya fruit maturity detection tool based on the colour of the fruit skin using Arduino TCS3200, LCD, and Buzzer. The tool made in this study can help farmers or laymen in identifying the level of ripeness of papaya fruit quickly and accurately. This tool uses a TCS3200 colour sensor to measure the colour of the fruit with precision. Arduino acts as the brain of the system that receives data from the colour sensor and performs analysis to identify the ripeness level of papaya fruit. The results of the fruit ripeness analysis are displayed on the LCD screen. In addition, this tool is also equipped with a buzzer that provides sound notification when the fruit has reached the desired level of ripeness. This study obtained the results of RGB values 225,215,0 on papaya fruit that detected its maturity
Formalin Detection Device in Tofu Food with Telegram Monitoring: Alat Pendeteksi Formalin pada Makanan Tahu dengan Monitoring Telegram
No full textTofu is a side dish or food used by many people. As a processed food product made from soybeans, white tofu contains protein and high water content so it is very good for the growth of spoilage microorganisms.The usual preservation methods of traders include soaking tofu in formalin so that tofu is more resistant to decay, resistant to microorganisms, and maintaining its freshness for up to seven days. As part of the research, formaldehyde detection devices will be made in tofu foods with monitoring telegrams. The system uses HCHO sensors and a Node MCUESP 32 microcontroller, which is then transmitted through a database that allows you to view through the LCD screen and the Telegram Android smartphone application, of which many applications are installed to facilitate this. Users can check formalin plates remotely via internet network connectio
Blind Safety Belt to Detect Obstacles Using Ultrasonic Sensors and GPS: Sabuk Pengaman Tunanetra Untuk Mendeteksi Objek Penghalang Menggunakan Sensor Ultrasonic dan GPS
No full textThe guiding block facility is a government effort for blind persons with disabilities to be able to walk independently. Therefore, researchers created assistive devices for the blind. This tool uses an ultrasonic sensor that has been implemented on Arduino with a GPS module that can help determine the whereabouts of the user and is equipped with a buzzer that can sound when the distance between objects and the user is close. In this test there are several things that must be tested, namely the accuracy of the ultrasonic sensor, the buzzer sound, the accuracy of the GPS and the SIM800L module. Based on the results obtained from the test, it can be concluded that the blind seat belts for detecting obstructing objects using ultrasonic and GPS sensors have worked as expected. We hope that the creation of this tool will make life easier for its users
EDUCATION ON THE MANAGEMENT AND EFFICIENCY OF ELECTRICAL ENERGY USE FOR HOUSEHOLDS IN KAMPUNG TAMBAK ASRI MOROKREMBANGAN SURABAYA
Full text linkObjective: The use of electrical energy by housewives is often less efficient due to their habit of leaving appliances connected and low awareness of managing energy. This has an impact on increasing electricity costs to be paid and energy waste. This community service activity aims to increase the understanding of housewives in the correct and efficient use of electrical energy. Method: The activity was held at the Tambak Asri 204 Al Islam Mosque in Surabaya which was attended by 35 housewives who were members of the Ta'lim At-Taubah Assembly. The method of implementing service includes making and distributing energy-saving educational posters, interactive counseling on electricity use habits, and energy-efficient household appliances simulations. Results: The results of the activity showed an increase in participants' knowledge about the importance of unplugging electrical equipment after use, turning off lights when not in use, and choosing energy-saving electrical devices such as Light Emitting Diode (LED) lamps. Novelty: Thus, this activity is able to foster collective awareness in reducing electricity waste while supporting household cost savings and environmental sustainability
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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