Feedforward control laws for rest--to--rest slewing maneuvers of spacecraft using variable speed control moment gyroscopes for attitude control are determined using an inverse simulation method based on a constrained optimization algorithm. The technique allows a full exploitation of torque actuator redundancy provided by the system to efficiently avoid singular states as well as to deal with the issues of position/rate saturation and/or gimbal mechanical failure. The maneuver is specified in terms of time evolution of Euler angles or rotation angle about the eigenaxis. Reported results show that system performance is improved by taking advantage of wheel speed variation with limited increment of required power. Real--time implementation of the algorithm may be problematic due to the complexity of the dynamical model and the high number of constraints.
Variable Speed Control Moment Gyroscopes for Reorientation Maneuvers of Rigid Spacecraft
AVANZINI, Giulio;
2004-01-01
Abstract
Feedforward control laws for rest--to--rest slewing maneuvers of spacecraft using variable speed control moment gyroscopes for attitude control are determined using an inverse simulation method based on a constrained optimization algorithm. The technique allows a full exploitation of torque actuator redundancy provided by the system to efficiently avoid singular states as well as to deal with the issues of position/rate saturation and/or gimbal mechanical failure. The maneuver is specified in terms of time evolution of Euler angles or rotation angle about the eigenaxis. Reported results show that system performance is improved by taking advantage of wheel speed variation with limited increment of required power. Real--time implementation of the algorithm may be problematic due to the complexity of the dynamical model and the high number of constraints.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
