Input-Shaped Control of Three-Dimensional Maneuvers of Flexible Spacecraft


Singh, T., & Vadali, S. R.


Journal of Guidance, Control, and Dynamics, 16(6), 1061-1068, 1993.


This paper deals with the control of three-dimensional rotational maneuvers of flexible spacecraft. A spacecraft model with a cylindrical hub and four symmetric appendages is considered. The appendages are long and flexible, leading to low-frequency vibration under any control action. To provide a comprehensive treatment of input-shaped controllers (time-delay filters), both open-loop and closed-loop maneuvers are considered. For the open-loop maneuver, a five-switch, near-minimum-time bang-bang controller is designed based on the rigid-body model. The design procedure accounts for the presence of the time-delay filler for determining the switch times. In addition, a combination of a Lyapunov controller with the time-delay control technique is proposed to take advantage of the simple feedback control strategy and augment it with a technique that can eliminate the vibratory motion of the flexible appendages more efficiently.

   Author = {T. Singh and S. R. Vadali},
   Journal = {Journal of Guidance, Control and Dynamics},
   Month = {Nov.},
   Pages = {1061-1068},
   Title = {Input-Shaped Control of Three-Dimensional Maneuvers of Flexible Spacecraft},
   Volume = {16},
   Number = {6},
   Year = {1993}