@InProceedings{SouzaGuerSmir:2010:ExOpCo,
               author = "Souza, Luiz Carlos Gadelha de and Guerman, Anna and Smirnov, 
                         Gueorgui Vitalievitch",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)}",
                title = "Experimental Optimazation of Control Techniques to Design a 
                         flexible Satellite Attitude Controler",
            booktitle = "Proceedings...",
                 year = "2010",
         organization = "International Conference on Engineering Optimization, 2. 
                         (EngOpt).",
            publisher = "APMTAC",
                 note = "Setores de Atividade: Atividades profissionais, 
                         cient{\'{\i}}ficas e t{\'e}cnicas.",
             keywords = "Experimental optimization, flexible satellite, attitude control.",
             abstract = "Placing a rigid-flexible satellite or any other spacecraft in 
                         orbit is a risky and expensive process; years of researching and a 
                         lot of money are transformed into equipments that will be beyond 
                         any possibility of maintenance in case something goes wrong. 
                         Besides, Attitude Control System (ACS) for flexible space 
                         satellites demands great reliability, autonomy and robustness. 
                         These flexible structures face low stiffness due to minimal mass 
                         weight requirements. Satellite ACS design usually based on 
                         computer simulations without experimental verification can face 
                         instability and/or inefficient controller performance due to model 
                         uncertainties,. In that context, experimental validation of new 
                         equipment and/or control techniques through prototypes is the way 
                         to increase system confidence. Experimental set up also allows 
                         verifying a variety of control techniques dealing with 
                         stabilization, identification, attitude control and robustness 
                         that need to be validated and implemented in order to improve ACS 
                         performance. In this paper one investigates the robustness and 
                         performance of two different multivariable methodologies in 
                         designing the ACS for a rigid-flexible satellite. The first one is 
                         the traditional time domain approach called LQG (Lineal Quadratic 
                         Gaussian) and the second one is the frequency domain HInfinity 
                         approach. Although these control techniques have their particular 
                         characteristics, this investigation tray to highlighted the 
                         advantages and benefits of each technique as for the control 
                         algorithm implementation. The satellite ACS design is performed 
                         initially in a computer simulation environment, following 
                         experimentally verification of the same control algorithm using 
                         Quanser rotary flexible link module. The controller performance 
                         was investigated considering its capacity of maneuvering the 
                         rigid-flexible link to a desired angle position at the same time 
                         that the link's vibrations are eliminate maintaining the maneuver 
                         as fast as possible. This preliminary investigation has shown that 
                         the controller performance based on the simulation model can be 
                         degraded when applied in an experimental set up. Besides, the 
                         control algorithm complexity is function of the control 
                         methodology; therefore, its implementation in the satellite 
                         onboard computer must take into account its simplicity.",
  conference-location = "Lisboa",
      conference-year = "6 - 9, Set. 2010",
                 isbn = "9789899626430",
                label = "lattes: 5801699053436537 1 SouzaGuerSmir:2010:ExOpCo",
             language = "en",
           targetfile = "Souza_Experimental.pdf",
        urlaccessdate = "19 maio 2024"
}