Polytec-3D-Scanning-Laser-Vibrometer

The Structural Dynamic and Acoustics Systems Laboratory is well equipped to conduct modal analysis, structural dynamic, acoustical, and control system experiments and modeling.

Major Hardware/Acquisition Systems

  • Polytec 3D Scanning Laser Vibrometer: The 3D scanning laser vibrometer can be used to precisely measure the full field vibration response of a surface having complex geometry, without contacting or mass loading the structure.
  • Aramis 3D Digital Image Correlation System: The 3D DIC system can be used to measure full field structural shape, strain, and deformation with very high spatial resolution.
    • Two separate systems with three sets of cameras.
  • 64 Channel Microphone Array: By using a microphone array and acoustic holography or beamforming, the full field sound radiation can be mapped to identify critical or local sources of sound.
  • Wind Turbine Blade Structural Health Monitoring Test Bed: Wind turbine blade configurations can be designed and customized sensor systems can be designed and implemented to investigate a variety of structural health monitoring and damage related issues.
  • DJI Matrice 200 V2 unmanned aerial vehicle (UAV) + Zenmuse XT2 Infrared (IR) Camera: The UAV incorporates a payload to embed a IR camera fitting a 13 mm lens to precisely acquire high-resolution videos and images of a targeted object in the IR spectrum for assessing heat loss and defects.
  • FLIR ONE Pro Thermal Infrared (IR) Camera: Low-cost, portable IR camera that can be fitted on a phone to record videos and images of a targeted object in the IR spectrum for assessing heat loss and defects.
  • RDI Motion Amplification IRIS M and IRIS MX: The motion amplification system can be used to magnify the motion of portion of structures that cannot be seen with naked eyes from video recorded using digital cameras (both consumer grade and high-speed).

Additional Instrumentation

Over 150 different accelerometers, a wide variety of modal analysis hammers, 10 mechanical shakers (2 to 200 lbs. range), a variety of piezoelectric actuators, displacement sensors, 2 magnetic probes, 4 capacitance probes, 7 impedance heads, ~15 force transducers, twelve spectrum analyzers (2, 4, 7, 8, and 30 channel), 75+ acoustical microphones, associated microphone amplifiers and signal conditioners, intensity probes, vibration and acoustic pistaphone calibrators, Trek high-voltage power amplifier, ACX high-current power amplifier, and a variety of miscellaneous electronic equipment. Some particular items are:

  • 64 channel National Instruments PXI 64 channel data acquisition system
  • 40 channel Spectral Dynamic Jaguar acquisition system
  • 140 channel DIFA/SCADAS acquisition system (in 3 separate racks)
  • Several 4 channel DACTRON PC based portable acquisition systems
  • Several 8 channel Crystal/Spider acquisition systems
  • Several dual channel FFT analyzers
  • dSpace (MATLAB based control and data acquisition system)

Primary software

  • Suite of CADA-X (software products for test, analysis, system modeling, correlation, vibroacoustics, acoustic holography)
  • FEA software (ANSYS, NASTRAN, ABAQUS) with pre/post processing software (FEMAP, Hypermesh, and ABAQUS/CAE)
  • Matlab/Simulink

Office & Computers

The space consists of approximately 3000 square feet of laboratory space including 700 square feet of graduate student office space. There are ample desks, printers, scanners, etc. More than 15 different personal computers are available within the laboratory.

Other Resources

Within the Department of Mechanical Engineering there is also a machine shop available to fabricate custom components as needed.