Pada penelitian ini, telah dibuat prototipe alat yang dapat mendeteksi kerusakan bearing pada kendaraan roda empat. Perangkat keras yang digunakan antara lain sensor getaran MPU6050, Modul Mikrokontroler Arduino Nano, Modul Bluetooth, dan smartphone. Alat ini memanfaatkan getaran dari roda pada sebuah kendaraan untuk mengetahui kondisi bearing-nya yang akan ditampilkan pada smartphone. Besarnya getaran yang terukur oleh sensor (accelerometer dan gyroscope) akan diklasifikasikan dan digunakan untuk membuat kategori baik, aman, dan rusak, menggunakan metode K-Nearest Neighbor (KNN). Hubungan antara perangkat lunak dan perangkat keras pendukung sistem dikendalikan oleh Arduino Nano. Kategori kerusakan bearing berhasil ditampilkan pada layar sebuah smartphone sehingga alat ini memiliki keunggulan antara lain murah, portable dan akurat. Tingkat keberhasilan sistem dalam mengenali nilai getaran berdasarkan pengujian mencapai nilai sebesar 90,37%.
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Sistem penerangan ruangan konvensional kurang efisien dalam penggunaan energi karena hanya menggunakan prinsip menyalakan (on) dan mematikan (off) lampu serta tidak menghiraukan pengaruh dan kontribusi dari luar atau pencahayaan matahari. Untuk mengatasi permasalahan tersebut dibuatlah sistem pengendalian cahaya lampu penerangan secara otomatis menggunakan Programmable Logic Controller (PLC) Omron sebagai pengendali. Proses pengendalian intensitas cahaya lampu, pada ruangan memanfaatkan dua sensor cahaya berjenis Light Dependent Resistance (LDR) dengan menggunakan metode fuzzy Sugeno sebagai cara pengambilan keputusan dengan dua himpunan dan tiga variabel disetiap himpunan, sedangkan untuk mengubah kembali ke bentuk bilangan crisp atau defuzzyfikasi menggunakan metode Centroid. Kendali fuzzy logic sangat tepat digunakan untuk pengendalian sistem yang bersifat non-linear dan adaptif. Berdasarkan hasil pengujian, sistem yang dibangun dapat berjalan dengan baik dengan tingkat akurasi pengendalian sebesar 99,38% yang diperoleh dari perbandingan antara pengujian sistem langsung dan pengujian dengan Matlab.Conventional room lighting systems are less efficient in energy use because they only use the principle of turning on (off) and turning off (off) lights and ignoring the influence and contribution of outside or solar lighting. To overcome these problems, a lighting control system was made automatically using the Omron Programmable Logic Controller (PLC) as a controller. The process of controlling light intensity, in a room utilizing two light sensors, type Light Dependent Resistance (LDR) using the Sugeno fuzzy method as a way of making decisions with two sets and three variables in each set, while to change back to the form of crisp numbers or defuzzification using the Centroid method. Fuzzy logic control is very appropriate to be used for controlling systems that are non-linear and adaptive. Based on the test results, the system built can run well with a level of accuracy of control of 99.38% obtained from the comparison between direct system testing and testing with Matlab.
Arif Setiawan, Subali, in this paper explain that a fixed rail track used as a railway line. Application of rail as a direct path not only to train. However, there are also robots that use rail movement path. Rail crossings are used as the robot is not made of steel, but a line. This robot uses a single rail line is black with a white stripe background of a width adapted to the sensor mounted on the robot. Photodiode sensor lines will be detected, and then transmitted to the microcontroller 8535 as the brain or the source of the instruction that has been programmed. 8535 will detect the sensor output and then process the data received to proceed to the Driver that is connected to the DC motor. The output of the microcontroller 8535 will also be displayed through the LCD as the display position of the sensor and input characters. As an added speed control robot 4x1 keypad which will give instruction in the form of characters into the Microcontroller. Keywords: Rail, Sensor Photodiode, Microcontroller 8535, DC Motor Driver, LCD, Keypad, DC Motor.
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