Design of a Spacecraft Geometrically Extended State Observer Based on SO(3) Modeling
摘要
A new geometric extended state observer based on a three-dimensional special orthogonal group (SO(3)) is designed in this paper. The observer estimates the spacecraft state and the total disturbance based on the outputs and inputs of the spacecraft. Compared with the traditional extended state observer, the proposed observer considers the geometric characteristics of the differential manifold and it does not depend on all the states of the spacecraft. The simulation results show that the proposed observer can quickly estimate the states of spacecraft and its disturbance.