author = "Venditti, Flaviane Cristine Faria and Rocco, E. M. and Prado, A. 
                         F. B. A. and Suhkanov, A.",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)}",
                title = "Gravity assist maneuvers applied on interplanetary trajectories",
            booktitle = "Anais...",
                 year = "2010",
         organization = "Workshop em Engenharia e Tecnologia Espaciais, 1. (WETE).",
            publisher = "INPE",
              address = "S{\~a}o Jos{\'e} dos Campos",
             abstract = "In this work, the problem of optimization of interplanetary 
                         trajectories with minimum fuel consumption, but with a time limit 
                         is studied. A methodology known as the Patched Conics was used, 
                         where the trajectory is divided into three parts: 1) departure 
                         phase, inside of the sphere of influence of the departure planet, 
                         2) heliocentric phase, during the journey between the planets; 3) 
                         arrival phase, inside the sphere of influence of the arrival 
                         planet. Furthermore, was considered the possibility of 
                         gravitational assisted maneuvers (swing-by) to reduce the fuel 
                         consumption. In this case the full trajectory would be divided 
                         into more parts, depending on the number of maneuvers. Therefore, 
                         the goal of this work is to find a combination of conical 
                         trajectories, using gravitational assisted maneuvers, which 
                         perform the transfer from a nearby of the departure planet to the 
                         vicinity of the arrival planet, spending a minimal fuel with 
                         minimal time for the journey. Considering the minimization of the 
                         time, the solution cannot be the solution of minimum fuel 
                         consumption, because the minimization of time and the minimization 
                         of the fuel are conflicting objectives. Thus, a multi-objective 
                         problem must be solved. Hence, was used a methodology based on the 
                         Non Inferiority Criterion (Pareto1, 1909) and the Smallest Loss 
                         Criterion (Rocco2 et al. 2003), capable of considering multiple 
                         objectives simultaneously, without reducing the problem to the 
                         case of optimizing a single objective as occur in the most methods 
                         found in the literature. A mission to Pluto, similar to the NASAs 
                         New Horizons Mission, was studied considering gravitational 
                         assisted maneuvers in Jupiter and Saturn. Simulating the 
                         trajectories and the maneuvers using the Transfer Trajectory 
                         Design Programs (Sukhanov3, 2004), several possibilities were 
                         analyzed for many combinations of fuel consumption, time of 
                         departure, time of arrival and planet used for the swing-by. Then, 
                         using the Multi-Objective Optimization Program (Rocco4, 2002) the 
                         problem was solved seeking the best combination. The results can 
                         provide a good assistance for the mission analysis reducing the 
                         cost and time.",
  conference-location = "S{\~a}o Jos{\'e} dos Campos",
      conference-year = "30 mar. - 1 abr. 2010",
                 issn = "2177-3114",
             language = "en",
                  ibi = "8JMKD3MGP7W/38UFRKL",
                  url = "http://urlib.net/rep/8JMKD3MGP7W/38UFRKL",
           targetfile = "CMC_dinorb_1051-eng.pdf",
               volume = "IWETE2010-1051",
        urlaccessdate = "22 jan. 2021"