Abstract
The attitude control systems of satellites with rigid and flexible components are demanding more and more better performance resulting in the development of several methods control. For that reason, control design methods presently available, including parameters and states estimation, robust and adaptive control, as well as linear and nonlinear theory, need more investigation to know their capability and limitations. In this paper the investigated technique is H‐Infinity method in the performance of the Attitude Control System of a Rigid‐Flexible Satellite.
Highlights
The rapidly complexity increase of systems and processes to be controlled has stimulated the development of sophisticated analysis and design methods called advanced techniques
With the study of the Attitude Control System ACS of space structures with flexible antennas and/or panel and robotic manipulators, one becomes more complex when the dimensions of such structures increase due to necessity to consider a bigger number of vibration modes in its model in order to improve the model fidelity 2
H∞ techniques have the advantage over classical control techniques in which the techniques are readily applicable to problems involving multivariable systems with cross-coupling between channels; disadvantages of H∞ techniques include the high level of mathematical understanding needed to apply them successfully and the need for a reasonably good model of the system to be controlled
Summary
Throughout the decades of 1980 and 1990, H-Infinity control method had a significant impact in the development of control systems; nowadays the technique has become fully grown and it is applied on industrial problems 5. In the control theory in order to achieve robust performance or stabilization, the H-Infinity control method is used. H∞ techniques have the advantage over classical control techniques in which the techniques are readily applicable to problems involving multivariable systems with cross-coupling between channels; disadvantages of H∞ techniques include the high level of mathematical understanding needed to apply them successfully and the need for a reasonably good model of the system to be controlled. H∞ method is used to minimize the closedloop impact of a perturbation: depending on the problem formulation, the impact will be measured in terms of either stabilization or performance. One concludes that the procedures to project control systems are a difficult task due to the cited terms which are conflicting properties 7
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