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US Air Force selects vibrometer

A Polytec product story
Edited by the Engineeringtalk editorial team Sep 8, 2004

The US Air Force Institute of Technology is to use the PSV-400-3D three-dimensional scanning vibrometer to measure vibration characteristics of unmanned aerial vehicles and other intricate structures.

The US Air Force Institute of Technology (AFIT), Wright Patterson AFB, Ohio is to use the Polytec PSV-400-3D three-dimensional scanning vibrometer to measure vibration characteristics of unmanned aerial vehicles (UAVs) and other intricate aerospace and vehicular structures.

Polytec's first North American sale of this premier instrument to AFIT permits engineers to perform complete 3D vector component analysis on complex structures.

Simultaneous measurement using three independent sensor heads offers noncontact vibration mapping at extremely high spatial resolution for aerospace, defence and automotive applications.

By auto-positioning laser light instead of instrumenting triaxial accelerometers (locating, attaching, wiring, phase-matching and eventually removing), the PSV-400-3D reduces setup time and simplifies data acquisition.

This also improves measurement accuracy by eliminating mass loading and local stiffening while increasing sampling density and total points sampled to over 250,000.

Other key features of Polytec's flexible system include intuitive animated data visualisation and data compatibility with commonly used modal/FEM analysis programs.

The PSV-400-3D is an ideal experimental modal and structural analysis tool that uses the Doppler (frequency) shift of back-scattered laser light to determine the instantaneous velocity and displacement of a point on a vibrating structure.

Important aerospace applications include measuring the vibration characteristics of intricate prototypes and preproduction products for design verification, characterising manufactured or assembled airframe components for production and quality control, and evaluating aging aircraft structures for maintenance and repair.

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