Wind tunnel engineers require measurements of position and orientation of aerospace models under test conditions. The measurement technique must be non-contact, non-intrusive and have a high sample rate. Videometric techniques based on multiple, synchronized CCD cameras can supply position and orientation data at 30Hz or 60Hz with acceptable accuracies. This paper describes a data acquisition system designed and implemented at NASA Langley Research Center to capture the position and orientation of free-flight aerospace models. System calibration and data processing techniques are discussed. Two examples of model tests will be described and examples of data output will be presented.

No abstract

No abstract

No abstract

No abstract

No abstract

Photogrammetry affords the only non-contact means ofproviding unambiguous six-degree-of-freedom estimates for rigid body motion analysis. Video technology enables convenient off-the-shelf capability for obtaining and storing image data at frame [30Hz] or field [60Hz] rates. Videometry combines these technologies with frame capture capability accessible to PCs to allow hitherto unavailable measurements critical to the study ofrigid body dynamics. To effectively utilize this capability, however, some means of editing, post processing, and sorting substantial amounts of time coded video data is required. This paper discusses a prototype motion analysis system built around PC and video disk technology, which is proving useful in exploring applications of these concepts to rigid body tracking and deformation analysis. Calibration issues and user interactive software development associated with this project will be discussed, as will examples of measurement projects and data reduction.

No abstract