Advances in Fine Line-Of-Sight Control for Large Space Flexible Structures
Francesco Sanfedino, Gabriel Thi\'ebaud, Daniel Alazard, Nicola, Guercio, Nicolas Deslaef

TL;DR
This paper presents a robust control framework for large space flexible structures, integrating advanced modeling and innovative microvibration reduction techniques to enhance fine line-of-sight pointing accuracy in space missions.
Contribution
It introduces a multi-body TITOP modeling approach combined with robust control techniques and a novel microvibration mitigation architecture using proof-mass actuators.
Findings
Enhanced pointing accuracy with the new control architecture.
Effective reduction of microvibrations from reaction wheels and solar array drives.
Improved line-of-sight stability through hybrid sensor fusion.
Abstract
The increased need in pointing performance for Earth observation and science Space missions together with the use of lighter and flexible structures directly come with the need of a robust pointing performance budget from the very beginning of the mission design. An extensive understanding of the system physics and its uncertainties is then necessary in order to push control design to the limits of performance and constrains the choice of the set of sensors and actuators. A multi-body framework, the TITOP approach, is used to build all the elementary flexible bodies and mechanisms involved in a fine pointing mission. This framework allows the authors to easily include all system dynamics with an analytical dependency on varying and uncertain mechanical parameters in a unique Linear Fractional Transformation model. This approach opens the doors to modern robust control techniques that…
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Taxonomy
TopicsSpace Satellite Systems and Control · Spacecraft Design and Technology · Structural Analysis and Optimization
MethodsBalanced Selection
