Kinematic Telemetry from Small-Scale Wind Tunnel Models
Abstract
The development, assembly, calibration, and testing of a kinematic telemetry technique of determining the trajectory of a small model in free motion in a wind tunnel is described. Instead of measuring model displacement from a film record of the trajectory, accelerations of the model in the conventional six degrees of freedom were determined through the use of accelerometers and solid-state telemetry. Four models of a 1/15-scale fuel tank were each equipped with six linear accelerometers and one velocity sensor, analog-to-digital converters, and an eight-channel transmitter, all powered by a lithium battery pack.The models were released at transonic conditions in the wind tunnel. Model acceleration data were transmitted to a receiver and decoder outside the tunnel. The decoded digital data were stored on a personal computer equipped with a 32-bit data acquisition card and custom software. Correlation of accelerometer-based trajectories with conventional photography-based trajectories was good to excellent.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1995
- Accession Number
- ADA294442
Entities
People
- E. J. Marquart
- F. J. Gamble
- G. P. Walker
- K. I. Davis
- R. E. Dix
Organizations
- Arnold Engineering Development Complex