Gimbaled fine pointing in noisy environments
Abstract
The use of linear isolation to assure the accuracy and precision of the fine pointing of a payload in a noisy motion environment such as that represented by the Space Shuttle is considered. The angular errors associated with a rigid body gimballed pointing system subjected to angular and linear base displacement motion are analyzed, and it is shown that the use of linear isolation with inertial sensors in an active linear control can greatly improve system performance in the presence of linear disturbances. The performance of the Gimbalflex linear isolation system is then considered, and its stability is determined on the basis of the Routh-Hurwitz criteria. A block diagram is obtained for the Gimbalflex system and a cross stiffness analysis of a payload attached to the system is presented which demonstrates that using the Gimbalflex fine pointing system, energy at the resonance point is attenuated by a factor of at least 1000.
- Publication:
-
Guidance and Control 1980
- Pub Date:
- 1980
- Bibcode:
- 1980guco.conf..423O
- Keywords:
-
- Aerospace Environments;
- Gimbals;
- Pointing Control Systems;
- Random Noise;
- Space Shuttle Payloads;
- Isolation;
- Motion Stability;
- System Effectiveness;
- Transfer Functions;
- Spacecraft Instrumentation