Communications: directive radio wave systems and devices (e.g. – Directive – Including a satellite
Patent
1982-09-10
1988-06-28
Blum, Theodore M.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a satellite
342420, 342424, G01S 502, H04B 7185
Patent
active
047542802
ABSTRACT:
An attitude sensing system which incorporates the precision in attitude sensing of a satellite navigation system with the dynamic tracking capabilities of an inertial measurement unit. Optimally estimated attitude and system error signals are combined with the outputs of an inertial measurement unit to control the phase differences of signals received on an interferometer array from a navigation satellite. The outputs from the inertial measurement unit and the phase differences are processed in an optimal estimator filter to produce periodically updated attitude and system error signals. This permits inertial attitude sensing to benefit from the long term accuracy of attitude estimation based upon signals from the satellite navigation system. During conditions of high dynamic maneuvering in which attitude changes are rapid, the output of the inertial measurement unit continues to provide attitude information and controls the attitude sensing loop to insure that the system is not disoriented by such high dynamic conditions.
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Bowles W. Michael
Brown Alison K.
Thorvaldsen Tom P.
Blum Theodore M.
Issing Gregory C.
The Charles Stark Draper Laboratory Inc.
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