Add to ORKGThe theory, methods, and applications of the videogrammetric model deformation (VMD) measurement technique used at NASA for wind tunnel testing are presented. The VMD technique, based on non-topographic photogrammetry, can determine static and dynamic aeroelastic deformation and attitude of a wind-tunnel model. Hardware of the system includes a video-rate CCD camera, a computer with an image acquisition frame grabber board, illumination lights, and retroreflective or painted targets on a wind tunnel model. Custom software includes routines for image acquisition, target-tracking/identification, target centroid calculation, camera calibration, and deformation calculations. Applications of the VMD technique at five large NASA wind tunnels are ...
A series of wind tunnel tests have been conducted to evaluate a multi-camera videogrammetric system ...
In image-based measurements, quantitative image data must be mapped to three-dimensional object spac...
The objective of this paper is to compare the current state-of-the-art of the following three optica...
The purpose of this manual is to provide the user of the NASA VMD system, running the MDef software,...
A videogrammetric technique developed at NASA Langley Research Center has been used at five NASA fac...
The techniques used to acquire, reduce, and analyze dynamic deformation measurements of an aeroelast...
A photogrammetric closed circuit television system to measure model deformation at the National Tran...
The interest in adaptive devices for high-speed applications leads to the need for an accurate and r...
Videometric measurements in wind tunnels can be very challenging due to the limited optical access, ...
In this study the accuracy of a combined measurement of 3D surface deformation and the 3D position o...
Langley Research Center, was recently used to measure displacements and local surface angle changes ...
This paper describes the video model deformation technique (VMD) used at five NASA facilities and th...
Considering the characteristics of wind tunnel tests, a position measurement system that can minimiz...
As the benefit-to-cost ratio of advanced optical techniques for wind tunnel measurements such as Vid...
Single-camera, single-view videogrammetry has been used to determine static aeroelastic deformation ...
A series of wind tunnel tests have been conducted to evaluate a multi-camera videogrammetric system ...
In image-based measurements, quantitative image data must be mapped to three-dimensional object spac...
The objective of this paper is to compare the current state-of-the-art of the following three optica...
The purpose of this manual is to provide the user of the NASA VMD system, running the MDef software,...
A videogrammetric technique developed at NASA Langley Research Center has been used at five NASA fac...
The techniques used to acquire, reduce, and analyze dynamic deformation measurements of an aeroelast...
A photogrammetric closed circuit television system to measure model deformation at the National Tran...
The interest in adaptive devices for high-speed applications leads to the need for an accurate and r...
Videometric measurements in wind tunnels can be very challenging due to the limited optical access, ...
In this study the accuracy of a combined measurement of 3D surface deformation and the 3D position o...
Langley Research Center, was recently used to measure displacements and local surface angle changes ...
This paper describes the video model deformation technique (VMD) used at five NASA facilities and th...
Considering the characteristics of wind tunnel tests, a position measurement system that can minimiz...
As the benefit-to-cost ratio of advanced optical techniques for wind tunnel measurements such as Vid...
Single-camera, single-view videogrammetry has been used to determine static aeroelastic deformation ...
A series of wind tunnel tests have been conducted to evaluate a multi-camera videogrammetric system ...
In image-based measurements, quantitative image data must be mapped to three-dimensional object spac...
The objective of this paper is to compare the current state-of-the-art of the following three optica...