Evaluation of amplitude of low frequency spectrum components using ordinary accelerometers

Abstract

The paper deals with measurement and further evaluation of amplitude of spectrum components with a frequency ranging from 0.2Hz to 1Hz for pseudo-periodical processes. For example a car engine can produce random burst shaking if power contribution to the overall engine power is differing from each other individual cylinder. The amount of burst shaking is equal to quality and settings of car engine. The suggested methodology enables us to evaluate this burst shaking using ordinary accelerometers. The PULSE analyzer and three axis accelerometer were used as instrumentation for these measurements.