DESIGN IMPROVEMENT AND VIBRATION ANALYSIS OF GANTRY SYSTEM USING FINITE ELEMENT METHOD (FEM)

Abstract

A Gantry or linear robot is an industrial robot that move in straight line in three axes and at right angles to each other. Its structure must be able to hold the vibration depends on its function because vibration behavior and natural frequency plays a key role to every system in dynamic analysis, which can cause the system failure. Finite Element Method (FEM) and gyroscope can be used to analyze the vibration and natural frequency, it is very important to improve the design to avoid system failure. Gantry system in PT. Akebono Brake Astra Indonesia has unrigid structure and contain too much vibration. The system was designed in 3D CAD by Solidworks software and analyzed using frequency analysis, then comparing the result with experimental result using accelerometer gyroscope to know the validity of the model. Design improvement is conducted to improve the vibration system by increasing their natural frequency. From the improvement result, the natural frequency increased in every mode shape, mode 1: from 16,559 Hz become 23,56 Hz; mode 2: from 17,903 Hz become 30,967 Hz; mode 3: from 55,856 Hz become 60,715 Hz; mode 4: from 73,804 Hz become 82,266 Hz; mode 5: from 88,367 Hz become 97,477 Hz.