22 January 2002 Development and performance of an angular vibration sensor with 1-1000 Hz bandwidth and nanoradian level noise
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Abstract
Applied Technology Associates' ARS-12 series sensor is the most sensitive inertial angular vibration sensor currently available. The sensing mechanism is based on magnetohydrodynamic (MHD) principles. This sensor series has a nominal bandwidth from 1 - 1000 Hz and a noise-equivalent angle of less than 50 nanoradians from 2 - 1000 Hz. The ARS- 12 can measure inertial angular motions of less than 10 nanoradians at discrete frequencies. Their solid-state design makes these sensors small and extremely rugged. In addition, the ARS-12 is essentially impervious to linear acceleration and angular cross-axis sensitivity is limited to incorrect physical alignment. The ARS-12 has recently undergone several design changes in order to perform in the space environment and improve performance. The most recent sensor package, the AADS-002, contains three orthogonal ARS- 12 sensors that produce a signal voltage proportional to displacement directly instead of the inherent velocity domain. The AADS-002 design, testing, and performance will be reviewed in this paper.
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Darren R. Laughlin, Darren R. Laughlin, Dennis Smith, Dennis Smith, "Development and performance of an angular vibration sensor with 1-1000 Hz bandwidth and nanoradian level noise", Proc. SPIE 4489, Free-Space Laser Communication and Laser Imaging, (22 January 2002); doi: 10.1117/12.453231; https://doi.org/10.1117/12.453231
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