Accession Number:

ADA091634

Title:

Rocket Sled Improved Velocity Measuring System Feasibility Study.

Descriptive Note:

Final rept.,

Corporate Author:

EFFECTS TECHNOLOGY INC SANTA BARBARA CA

Report Date:

1980-04-10

Pagination or Media Count:

246.0

Abstract:

A study has been performed to determine ways to more accurately measure rocket sled velocity. Extreme accuracies of or - .0003 metersec up to 600 meterssec 0.001 ftsec up to 2000 ftsec are desired in order to adequately test guidance systems. Measurements are desired every millisecond along the 15 kilometer 10 mile length of the track. After an extensive search, optical interferometers of 2 types were selected for further study. The first of these looks ahead to a sequence of mirrors mounted next to the track. The second looks vertically down at the rail surface and uses fore and aft scattered light from a laser illuminated spot. An improved version of an existing optical beam break system was also selected as a lower performance, lower cost option. Areas of investigation have been the high levels of vibration on the sled, alignment fluctuations due to sled flexing and yaw, and signal-to-noise ratio including sources, paths and detectors. Other investigations concerned variations in the speed of light, limits of angle resolution and methods of referencing the velocity to a shock mounted guidance package. Experiments are recommended to obtain data on the ambient environments, the sled environment, and several environment controlling and instrumentation techniques. Author

Subject Categories:

  • Lasers and Masers
  • Test Facilities, Equipment and Methods
  • Optical Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE