@Article{MeirelesGomePradMelo:2023:OpSuSo,
               author = "Meireles, Lucas Gouv{\^e}a and Gomes, Vivian Martins and Prado, 
                         Antonio Fernando Bertachini de Almeida and Melo, Cristiano Fiorilo 
                         de",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and 
                         {Universidade Estadual Pautlista (UNESP)} and {Instituto Nacional 
                         de Pesquisas Espaciais (INPE)} and {Universidade Federal de Minas 
                         Gerais (UFMG)}",
                title = "Optimum, suboptimal and solar sailing orbital maneuvers for a 
                         spacecraft orbiting the Earth",
              journal = "Symmetry",
                 year = "2023",
               volume = "15",
               number = "2",
                pages = "e512",
                month = "Feb.",
             keywords = "astrodynamics, maximum principle of Pontryagin, optimal control, 
                         orbital mechanics, solar sailing.",
             abstract = "The present research performs numerical studies to search for the 
                         best maneuvers, from the point of view of minimum time, to make 
                         adjustments in the semi-major axis, eccentricity and inclination 
                         of a spacecraft traveling around the Earth. For those maneuvers, 
                         low thrust propulsion is used under optimal and sub-optimal 
                         assumptions, to verify the main differences in terms of transfer 
                         time. In addition, solar sail dynamics is used. The spacecraft is 
                         assumed to have a propulsion with a fixed magnitude and that the 
                         control is based on choosing the direction of the propulsion. It 
                         is found that optimal control gives the minimum transfer time, 
                         while sub-optimal control restricted the control to follow a 
                         predescribed function, which is assumed to be a constant or linear 
                         function in time. Finally, solar sails present themselves as an 
                         option where fuel is a critical factor, given their much longer 
                         maneuver duration, but with a zero fuel consumption. The 
                         numerical-analytical modeling of optimization methods developed in 
                         this study can break any type of symmetry in the solutions. In 
                         turn, they can increase their energetic efficiency. The present 
                         research compares those results in detail, in particular looking 
                         at the transfer time in all cases studied.",
                  doi = "10.3390/sym15020512",
                  url = "http://dx.doi.org/10.3390/sym15020512",
                 issn = "2073-8994",
             language = "en",
           targetfile = "symmetry-15-00512.pdf",
        urlaccessdate = "04 maio 2024"
}