Observer-based multi-objective parametric design for spacecraft with super flexible netted antennas

Abstract

A multi-objective parametric design method that based on therobust observer is proposed for the attitude control of satellites withsuper flexible netted antennas. First, a parametric observer-based controller is obtained based on the eigen-structure assignment theory. The closed-loop poles are assigned to desiredpositions or regions, and full degrees of freedom of the design, which are characterized by a set of parameters, are preserved under the proposed control law. Second, the obtainedparameters are comprehensively optimized to make the closed-loop system havelower eigenvalue sensitivity, a smaller control gain, and stronger toleranceto high-order unmodeled dynamics and external disturbances. Finally,comparative simulations are carried out based on practical engineeringparameters of a satellite in order to verify the effect of the proposed method, andalso to show their superiority over the traditional proportional-integral-derivative (PID) controller with filters and thetraditional dynamic compensators.