COMPARISON OF VIBRATION RESPONSE AVERAGING RESULTS USING ADVANCED METHOD AND MATLAB METHOD

• Main Author: Ivan Sumartoyo, Fransiskus
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/68200
• Institution: Institut Teknologi Bandung

The averaging process is a way to reduce noise in the vibration measurement results of industrial machines. One of the averaging methods is Time Synchronous Averaging (TSA). The TSA method that has been developed by the ITB PAU Dynamics Laboratory is the Advanced Method TSA. Since 2017, the averaging process using the TSA method can be performed on MATLAB applications using the tsa syntax. This study aims to compare two TSA averaging methods, namely Advanced Method TSA and MATLAB Method TSA. In this study, both methods will be applied to an unbalance case of a two-stage rotor test device. The test will be carried out twice, namely with reference to the upper rotor shaft and the lower rotor shaft. The rotational speed of the motor used is the same for both cases, which is 1600 rpm. After the test is done, the measurement results are averaged using both methods. The resulting TSA signal is then compared with the signal before the TSA. After that, the results of the averaging process are compared to each other. Comparisons were made in both the time domain and the frequency domain. Finally, analysis of transient signal and signal distortion is carried out. The result of comparison with the reference of the upper rotor shaft shows that both methods produced almost the same time domain and frequency domain vibration signals. Meanwhile, the comparison results with the lower rotor shaft reference show that the MATLAB Method TSA produces a slightly better frequency domain vibration signal. This is because the amount of truncated data in the MATLAB Method TSA results is less than the Advanced Method, resulting in slightly better frequency resolution.