Aeronautics and astronautics – Missile stabilization or trajectory control – Automatic guidance
Patent
1992-01-15
1994-11-01
Lobo, Ian J.
Aeronautics and astronautics
Missile stabilization or trajectory control
Automatic guidance
F41G 700, F42B 1502
Patent
active
053601840
ABSTRACT:
One or more strap-down star tracker modules and a strap-down gyro module cooperate to provide a high-performance and low-cost inertial guidance system especially well suited for ballistic missiles. The one or more star tracker modules include an alignment laser that cooperates with one or more gyro module autocollimation mirrors to measure three-axis bending and twist between the one or more strap-down star tracker modules and the strap-down gyro module. The one or more strap-down star tracker modules and the strap-down gyro module respectively determine inertial angle independently of one another. The strap-down gyro module is compensated for gyro drift whenever any difference remains between the inertial angle measured thereby and the same inertial angle measured by the one or more star tracker modules after isolating the contribution thereto of the measured three-axis bending and twist. Ring lasers are exemplary of the gyros of the strap-down gyro module, and an optical tracker that includes a beam expander/compressor telescope assembly and a high-bandwidth mosaic array sensor having a multi-spot tracking capability is exemplary of the one or more strap-down star tracker modules.
REFERENCES:
patent: 3746281 (1973-07-01), Stripling
patent: 3924824 (1975-12-01), Brodie et al.
patent: 4262861 (1981-04-01), Goldstein
Lobo Ian J.
The Charles Stark Draper Laboratory Inc.
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