@Article{CarraraKuga:2013:EsFrPa,
               author = "Carrara, Valdemir and Kuga, H{\'e}lio Koiti",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)}",
                title = "Estimating friction parameters in reaction wheels for attitude 
                         control",
              journal = "Mathematical Problems in Engineering",
                 year = "2013",
               volume = "2013",
               number = "249674",
                pages = "8pp",
             keywords = "artificial satellites, attitude control, reaction wheel, parameter 
                         estimation.",
             abstract = "The ever-increasing use of artificial satellites in both the study 
                         of terrestrial and space phenomena demands a search for 
                         increasingly accurate and reliable pointing systems. It is common 
                         nowadays to employ reaction wheels for attitude control that 
                         provide wide range of torque magnitude, high reliability, and 
                         little power consumption. However, the bearing friction causes the 
                         response of wheel to be nonlinear, which may compromise the 
                         stability and precision of the control system as a whole. This 
                         work presents a characterization of a typical reaction wheel of 
                         0.65 Nms maximum angular momentum storage, in order to estimate 
                         their friction parameters. It used a friction model that takes 
                         into account the Coulomb friction, viscous friction, and static 
                         friction, according to the Stribeck formulation. The parameters 
                         were estimated by means of a nonlinear batch least squares 
                         procedure, from data raised experimentally. The results have shown 
                         wide agreement with the experimental data and were also close to a 
                         deterministic model, previously obtained for thiswheel.This 
                         modelwas then employed in aDynamicModel Compensator (DMC) control, 
                         which successfully reduced the attitude steady state error of an 
                         instrumented one-axis air-bearing table.",
                  doi = "10.1155/2013/249674",
                  url = "http://dx.doi.org/10.1155/2013/249674",
                 issn = "1024-123X",
             language = "en",
           targetfile = "249674.pdf",
                  url = "http://dx.doi.org/10.1155/2013/249674",
        urlaccessdate = "10 maio 2024"
}