Spacecraft Attitude Control Compensating Internal Payload Motion Using Disturbance Observer Technique
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Spacecraft attitude motion compensation approach to deal with internal slewing payload motion is addressed in this study. The internal payload motion is generated by a steering mechanism such as steerable gimbals for image acquisition as well as error correction due to orbital and attitude errors. Disturbance caused by payload motion in general cannot be measured using sensing devices. The disturbance effect can be estimated by using the so-called disturbance observer technique. The estimated disturbance can be compensated by a feedforward control law. The new control law can accommodate internal disturbance by a combined conventional feedback and feedforward control for estimated disturbance.
KeywordsSpacecraft attitude control Payload motion Disturbance observer Feedforward control Image navigation and registration
This research was supported by the Space Core Technology Development Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (NRF-2013M1A3A3A02042524).
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