Article | Proceedings of the 10<sup>th</sup> International Modelica Conference; March 10-12; 2014; Lund; Sweden | Nonlinear inverse models for the control of satellites with flexible structures Linköping University Electronic Press Conference Proceedings
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Nonlinear inverse models for the control of satellites with flexible structures
Matthias J. Reiner: German Aerospace Center (DLR), Institute of System Dynamics and Control, Wessling, Germany Johann Bals: German Aerospace Center (DLR), Institute of System Dynamics and Control, Wessling, Germany
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Proceedings of the 10th International Modelica Conference; March 10-12; 2014; Lund; Sweden
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Nonlinear inverse dynamic models can be utilized in various parts of advanced model-based control system design: reference trajectory optimization; feedforward control and feedback linearization [35]. In this paper; a new synthesis approach for nonlinear inverse dynamic models of satellites with flexible structures is presented. For satellite configurations with unstable zero dynamics; a stable inverse model approximation is proposed which has been successfully applied to robots with flexible bodies.

This inverse modeling approach is part of the newly developed DLR Space Systems Library for objectoriented modeling and simulation of satellites and launchers in a detailed space environment. For satellites with flexible structures; the library provides models for normal simulation mode and the necessary tools to directly generate approximate inverse models.

In this paper; trajectory optimization is shown to be an important use case for inverse dynamic models. By inversion based reformulation of the trajectory optimization problem; the optimal reference motion of the control system can be determined in a reliable and efficient way.

Keywords: Satellite modeling; nonlinear inverse model; trajectory optimization; flexible structure

Proceedings of the 10th International Modelica Conference; March 10-12; 2014; Lund; Sweden

Matthias J. Reiner, Johann Bals
Nonlinear inverse models for the control of satellites with flexible structures

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Proceedings of the 10th International Modelica Conference; March 10-12; 2014; Lund; Sweden

Matthias J. Reiner, Johann Bals
Nonlinear inverse models for the control of satellites with flexible structures
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