Journal of Optimization Theory and Applications

, Volume 98, Issue 3, pp 545–568

Adaptive Robust Tracking for Flexible Spacecraft in Presence of Disturbances

  • S. Di Gennaro

DOI: 10.1023/A:1022667811792

Cite this article as:
Di Gennaro, S. Journal of Optimization Theory and Applications (1998) 98: 545. doi:10.1023/A:1022667811792


The paper deals with trajectory tracking for a flexible spacecraft, subject to a gravity-gradient disturbance, under parameter uncertainties. The controls are gas jets and reaction wheels, and the measured variables describe the attitude and angular velocity of the rigid part. The flexible dynamics is treated as an additional disturbance acting on a rigid structure. First, an adaptive control is designed with only the gravity-gradient disturbance acting on the spacecraft; second, it is proved to be effective also in the presence of disturbance due to the flexibility, provided that appropriate robustness conditions on the controller gains are satisfied. These conditions use partial knowledge of the parameters describing the elastic dynamics. Simulations show the good performance of such control scheme and demonstrate its applicability even in the presence of input saturation.

Flexible spacecraftgravity-gradient disturbanceadaptive controlrobustnesstracking

Copyright information

© Plenum Publishing Corporation 1998

Authors and Affiliations

  • S. Di Gennaro
    • 1
  1. 1.Dipartimento di Ingegneria ElettricaUniversità di L'Aquila, Poggio di RoioL'AquilaItaly