Investigating efficiency of time domain curve fitters versus filtering for rectification of displacement histories reconstructed from acceleration measurements

摘要

Computing displacements of a structure from its measured accelerations has been major concern of some fields of engineering such as earthquake engineering. In vibration engineering also displacements are preferred to acceleration histories occasionally i.e. in the determination of forces applied on a structure. In brief the major problem that accompanies reconstruction of true displacement from acceleration record is the unreal drift observed in the double integrated acceleration. Purpose of the present work is to address source of the problem, introduce its treatments, show how they work and compare results of different techniques together. Finally some suggestions are made on the implementation of these techniques to remove disturbing part of the calculated displacements.