Attitude Tracking Control for Rigid-Flexible Coupled Spacecraft with Guaranteed Performance Bounds

摘要

In this paper, a PD+ controller tracking controller for rigid-flexiblecoupled spacecraft is presented in the presence of measurement errorsof attitude and angular velocity, observer errors of modal variables,external disturbances, and uncertainties in the inertia matrix, rigidflexiblecoupling matrix, stiffness matrix, and damping matrix. Theresults show that if all bounds on the above influencing factors areknown, then the presented controller has the ability to provide controlwith guaranteed and successively less conservative performancebounds on attitude tracking error, angular velocity tracking error,and modal variables. This analysis may shed some light on controlparameters design when specific attitude requirement, vibrationrequirement, and limited maximum control torque are given. Theversatility of this control strategy also appears in the condition whenattitude and angular velocity cannot be measured but provided bycertain observers with bounded known observer errors.