论文信息 - Kinematic Telemetry from Small-Scale Wind Tunnel Models

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.

R E Dix | E J Marquart | K I Davis | G P Walker | F J Gamble

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