PID+ TRACKING IN A LEADER-FOLLOWER SPACECRAFT FORMATION

摘要

In this paper we present two PID+ solutions to the problemrnof relative translational and rotational tracking in arnleader-follower spacecraft formation, based on the conceptrnof integrator backstepping. By using an integratorrnaugmentation technique, we include integral action in therncontrollers to account for unknown orbital perturbations.rnTwo methods for including integral action in the controlrnloop are presented, and the equilibrium points in the twornclosed-loop systems are proved to be uniformly exponentiallyrnstable and uniformly asymptotically stable, respectively.rnFinally, simulation results are presented to showrnthe controller performance.