Experimental study of oscillatory processes taken place in the operation of the mobile elevating work platform

Abstract

An analysis of the experimental study results of oscillatory processes in mobile elevating work platform (MEWP) when performing working procedures is presented in the paper.
The analysis of the main factors influencing the dynamic load of MEWP is carried out. Based on the analysis, geometric parameters that characterize the spatial arrangement of the working platform and the type of working procedure were selected as variable factors. Acceleration at the fixation point of the working platform to the boom and the junction point of a MEWP boom was selected as a recorded parameter.
According to the developed experimental technique, the results of acceleration measurements at the fixation point of the working platform to the boom and the junction point of a MEWP boom along the horizontal and vertical axes of the machine were obtained and analyzed.
The analysis of the obtained oscillograms of the oscillatory processes observed in the elevator when performing working procedures indicates that the greatest oscillations take place at the fixation point of the working platform to the boom along the vertical axis. It should be noted that the acceleration at other points of the MEWP boom, where the experimental data were recorded, is much less according to the amplitude of oscillation.
The analysis of the dynamic performance of the machine, depending on the type of working procedure, reveals that the amplitude of acceleration oscillations when lowering the working platform is 35% higher than when lifting. This fact indicates that the process of lowering the working platform has higher dynamic performance compared to lifting the working platform.