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Zaid, Ghufron
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DESIGN OF VERY LOW FREQUENCY VIBRATION EXCITER WITH SINGLE DEGREE OF FREEDOM Habibie, Muhammad Haekal; Zaid, Ghufron; Prawito, Prawito
Instrumentasi Vol 42, No 2 (2018)
Publisher : LIPI Press, Anggota IKAPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/instrumentasi.v42i2.155

Abstract

System providers artificial vibration is called vibration exciter, is a system used to provide vibration control that produces certain frequencies. Vibration exciter used for testing, measurement and calibration related to the scope of vibration. Vibration exciter on the market has a high price and requires sufficient technical knowledge. Therefore, the objective of the research is to design vibration exciter that is simple and low cost without compromising function. Research carried out by making the mechanical system of the vibration exciter whose main components consist of a vibration table, linear motion guide, connecting rod, pillars and base. In this research also design electronic systems as the actuator movement of the mechanical system that consists of a microcontroller, DC motors, and motor driver. Range of measuring frequency of the vibration exciter are expected to be realized is 0.1 Hz to 1 Hz. Measurement of frequency process is done using accelerometer sensor, signal conditioning and pulse analyzers to obtain vibration spectrum of the vibration exciter. From this research, the result about the range of the vibrating frequency values is between 43.575 milihertz to 425.99 milihertz. Another result from this research related to the value of the measurement uncertainty of vibration exciter is 2.1% to 4.0% of the nominal value of frequency
PERANCANGAN SISTEM PENGHASIL GETARAN ARTIFISIAL PADA RENTANG UKUR FREKUENSI SANGAT RENDAH UNTUK LAYANAN KALIBRASI SEISMOMETER Habibie, Muhammad Haekal; Hermawanto, Denny; Prasasti, Ninuk Ragil; Sirenden, Bernadus Herdi; Boynawan, Ahmad Mohammad; Zaid, Ghufron; Prawito, Prawito
Instrumentasi Vol 40, No 2 (2016)
Publisher : LIPI Press, Anggota IKAPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/instrumentasi.v40i2.34

Abstract

Vibration exciter merupakan sistem pengukuran penghasil getaran artificial yang dapat bekerja dalam rentang ukur frekuensi tertentu. Vibration exciter dibutuhkan untuk menjawab kebutuhan permintaan kalibrasi alat ukur dengan lingkup very low frequency vibration, seperti sensor seismometer untuk mitigasi bencana gempa bumi. Perancangan penelitian ini terbagi menjadi dua bagian, yakni melakukan perancangan bagian elektronika dan perancangan bagian mekanika. Secara umum, sistem vibration exciter yang dibuat bekerja dengan cara memasukkan nilai PWM ke Arduino Uno yang menentukan nilai duty cycle dan memberikan tegangan kepada motor DC sebagai aktuator sehingga menimbulkan percepatan angular. Meja getar dari plat aluminium terhubung dengan motor DC dengan menggunakan connecting rod akan bergerak maju dan mundur secara translasi. Nilai pergerakan maju dan mundur akan dideteksi oleh sensor accelerometer dengan menggunakan conditioning amplifier akan mereduksi noise dari pengukuran yang dilakukan. Nilai frekuensi dan percepatan dari meja getar dapat dianalisis dengan metode transformasi Fourier dengan menggunakan pulse analyzer.
Co-Authors Boynawan, Ahmad Mohammad Habibie, Muhammad Haekal Hermawanto, Denny Prasasti, Ninuk Ragil Prawito, Prawito Prawito, Prawito Sirenden, Bernadus Herdi