Robustness and Performance of Multivariable Techniques for Attitude Control of a Rigid-flexible Satellite
- Paper number
IAC-08.C1.1.10
- Author
Mr. Luiz Carlos Gadelha De Souza, Instituto Nacional de Pesquisas Espaciais (INPE), Brazil
- Year
2008
- Abstract
Space missions involving multibody and flexible structures demands of the Attitude Control System (ACS) great reliability, autonomy and robustness. These multibody flexible structures face low stiffness due to prohibitive mass weight and the control design challenge in presence of uncertainties. Satellite ACS design methods usually are based on a linear dynamics without considering the differences sources of uncertainties, which can take to instability and/or inefficient performance. In this paper one investigates the robustness and performance of different multivariable methodologies in controlling a rigid-flexible satellite Attitude. One begins with the traditional time domain approach, such as, the LQR (Lineal Quadratic Regulator) and LQG (Lineal Quadratic Gaussian); following frequency domain approach like the H? (H–Infinity). Although these control techniques have their particular characteristics, this investigation tray to highlighted the advantages and benefits of each technique as for designing the control algorithm for controlling rigid-flexible satellites. The satellite model takes into account the rigid and the increasing numbers of flexible modes during the design procedure. Having in mind the complexity of implementing a control algorithm into the satellite onboard computer, which in turn, is function of the types of sensor and actuators. A preliminary knowledge of which control technique is more appropriated in terns of robustness and performance can represent more economical design process.
- Abstract document
- Manuscript document
IAC-08.C1.1.10.PDF (🔒 authorized access only).
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