Fault Tolerant Model Predictive Control of Tethered Satellite System

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Ramezani, Mahya | 2017

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 50884 (45)
University: Sharif University of Technology
Department: Aerospace Engineering
Advisor(s): Asadian, Nima
Abstract:
In this thesis, a control method to cope with the fault in the two-satellite two-tether satellite systems has been proposed to avoid failing the mission in the case one tether is torn. A new model for the tethered satellite system with two tethers has been developed to show the effects of tethers’ tension forces in the attitude dynamics. One of the main features of this model is the ability of changing the tethers’ connection points to the co-satellite for attitude control purposes. As a result, tethers’ tension forces are used as control actions to reduce the fuel consumption. The introduced coupled tethered satellite system has been controlled using the model predictive control method. Furthermore, a new model predictive control approach has been introduced to control the coupled non-linear equations for reducing the calculation time and achieving better performance in presence of actuator failure
Keywords:
Model Predictive Control ; Fault-tolerant Control ; Tethered Satellite System (TSS) ; Tethered Deployment Control ; Two Tethered Satellite System

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