Adaptive Control and Stabilization of Elastic Spacecraft

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Institute of Electrical and Electronics Engineers Transactions on Aerospace and Electronic Systems



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This work treats the question of large angle rotational maneuver and stabilization of an elastic spacecraft (spacecraft-beam-tip body configuration). It is assumed that the parameters of the system are completely unknown. An adaptive control law is derived for the rotational maneuver of the spacecraft. Using the adaptive controller, asymptotically decoupled control of the pitch angle of the space vehicle is accomplished, however this maneuver causes elastic deformation of the beam connecting the orbiter and tip body. For the stabilization of the zero dynamics (flexible dynamics), a stabilizer is designed using elastic mode velocity feedback. In the closed-loop system including the adaptive controller and the stabilizer, reference pitch angle trajectory tracking and vibration suppression are accomplished. Simulation results are presented to show the maneuver capability of the control system.


Adaptive control; Adaptive control systems; Adaptive systems; Control systems; Feedback; Feedback control systems; Joining processes; Programmable control; Space vehicles; Space vehicles—Dynamics; Space vehicles—Vibration; Stability of space vehicles; Trajectory; Vehicle dynamics; Vibration control


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