STUDY OF SATELLITE MODEL ROBUSTNESS AND DESIGN OF A ROBUST ADAPTIVE CONTROL ALGORITHM

Abstract

Key Words : Attitude Control, Sliding Mode Controller, Fuzzy Logic Controller, Robust Control, Robust Stability Theorems. Summary : The main objective of this thesis is to study the issues of robustness of satellite control subsystem under typical and newly developed control algorithms. It represents different algorithms of satellite attitude control and tests their robustness using robustness theories. It also calculates system sensitivity against unknown perturbations and uncertain parameters. The results of robustness theories and sensitivity calculations motivated the design of new adaptive robust control algorithm, which has high robustness and good performance. The algorithm consists of a combination between robust hybrid sliding mode controller and adaptive fuzzy logic controller.