NLAD Cheetah®


The NLAD Cheetah® merges simplicity and accuracy in composite damage detection. A handheld device, it quickly assesses delaminations, disbonds, and degradation in a wide range of advanced materials.

The NLAD Cheetah relies on Impact Resonance testing, which involves applying an impact to the outside surface of a composite material and measuring the near field response. Using NLAD’s rapid electromechanical impact hammer (REMIH), the NLAD Cheetah rapidly delivers gentle, controllable taps to the material surface.

Immediately after each impact, the vibrations are recorded by an acoustic broadband receiver and analyzed to determine the material’s state. By only testing one side, it can detect a disbond on either side of a composite structure.

The NLAD Cheetah eliminates the human subjectivity of traditional tap testing, increasing precision while requiring minimal training. It provides simple PASS/FAIL indications for the user, as well as A-scans, acquiring information from both the time domain and the frequency domain.

Tests can be saved to the device and used to generate a map of the structure, and its defect locations. The user can email test data directly from the NLAD Cheetah for historical record-keeping or further review.

Typically, the types of material damage of interest for composite structures are mechanical disbonding, delaminations, crushed core, thermal degradation, and voids, all of which have been successfully detected by the NLAD Cheetah.

Recent Enhancements

  • Redesigned user interface is simpler than ever
  • System charges automatically, even during use
  • New Grid Mode assists the user when recording defect maps
  • Improved system performance through optimized signal processing
  • New analysis methods for advanced applications beyond tap testing
  • Quicker setup, out of the box to testing in less than a minute

Target NDI Applications

Composite Aerospace Components

  • Rotary Wings
  • Aircraft Fuselage
  • Nacelle Systems
  • Aircraft Control Surfaces
  • Honeycomb Sandwich Structures
  • Composite Turbine Fan Blades

Wind and Motor Sports

  • Automotive passenger cells
  • Automotive body panels
  • Sailboat spars and masts
  • Boat hulls

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