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Verification of 3D Image Correlation Using Digital High-Speed Cameras
ABSTRACT
Performance Verification of 3D ImageCorrelation Using Digital High-Speed Cameras
T. Schmidt, J. Tyson,...
Aerostructure
Wind Tunnel Testing
3D scanning verifies the "as-built" vs. "as designed" shape of scale models in wind tunnel testing to ensure that scaling does not cause deviations. In addition, GOM's ARAMIS high-speed deformation measurement system analyzes vibrations and deflections caused by wind load in the wind tunnel online and in real-time. This makes it possible to analyze wing behavior at specific speeds and in different flight maneuvers.
Reverse Engineering
Internal and external 3D aircraft scanning supplies 3D CAD information that accurately reflects the current state of the build of the airframe and ancillary equipment. The dense point cloud data represents a solid base for CAD modeling, thus allowing reliable planning of aircraft design and electronics.
Digital Assembly
Acquisition of "as-built" data and reverse engineering play key roles as links between the physical and digital model environments. Full aero surfaces are vital for scale-model wind tunnel testing, CFD model creation, symmetry checks, and finite element methods to ensure that computer simulations are valid.
Measuring the entire aircraft within one coordinate system also supports digital assembly, and capturing various positions of the movable control surfaces is essential to performing motion studies. Time-effective data acquisition results in cost-effective, fast, and easy integration into downstream processing requirements.
Fuselage & Cabin
CFD Analysis & CAD Comparison
Computer simulations are used to optimize aircraft design during the development phase. GOM's ATOS 3D digitizer supplies dense and precise polygon mesh representations of an aircraft's "as-built" condition to obtain a realistic matching CFD analysis. The 3D data is also valuable for symmetry checks and for detecting damage to working prototypes, caused for example by hard landings.
Material, Jointing & Component Testing
Optical metrology analyzes the mechanical properties and behavior of materials, joints, and components. GOM's ARAMIS sensors can be integrated into existing test environments, test stands, and testing machines. The non-contact sensors measure full-field 3D strain and deformation of soft and rigid materials under mechanical or thermal load. Thus conventional extensometers and strain gauges can now be replaced by GOM's real-time 3D surface deformation analysis.
FEM Deformation Verification
GOM's deformation measurement systems are widely used throughout the aerospace industry to measure and verify deformations in lightweight structures during operation. The systems are easy to integrate into test environments such as climate chambers, wind tunnels, fatigue test stands, etc. In addition, GOM software supports numerical result verification of the captured full-field 3D data.
High-Speed ARAMIS
Dynamic deformation measurement visualizes the behavior of aerodynamic structures in real use. During running operations, for example, real-time shape, vibration, acceleration, deformation, and imbalance can be analyzed.
Trilion is an authorized reseller of Photron cameras and has an agreement with Photron to be the sole source provider in the USA of Photron cameras for use with the ARAMIS digital image correlation system. Trilion has unique experience and capability to provide application-specific training and support for Photron cameras. Support includes high-speed digital image correlation applications such as ballistic impact, bomb blast effect testing, crash testing, Hopkinson Bar testing, etc.
Trilion is also a reseller of Phantom, Fastec, and Shimadzu cameras, and can readily import calibration and test images from any external camera stereo pair.
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