Measurement of vibrations by strain gauges, part II: Selection of measurement parameters

Theoretical formulations of the methods for measurement of vibrations on plates and beams by strain gauges are examined in view of the accompanying measurement errors. Systematic, random and total errors are evaluated in measurements by conventional accelerometers and by proposed strain gauge techniques. Criteria are established for error minimization. An analysis of practical limitations of gauge techniques is carried out, enabling the selection of acceptable measurement parameters to be done. A few experiments are described which confirm a good agreement between the conventional and strain gauge measurement methods.