Vibration measurements using continuous scanning laser vibrometry: velocity sensitivity model experimental validation

Abstract

This paper builds on a previous study in which the theoretical description of the velocity sensed by a single laser beam incident in an arbitrary direction on a rotating target undergoing arbitrary vibration was extended to continuous scanning Laser Vibrometer measurements on targets with flexible cross-sections. The velocity sensitivity model was written in terms of either laser beam orientation angles or deflection mirror scan angles, with the latter found to be most useful for continuous scanning applications.