Eventos Anais de eventos
CONEM 2018
X Congresso Nacional de Engenharia Mecânica
Trajectories estimation near a binary asteroid
Submission Author:
José Batista Silva Neto , SP , Brazil
Co-Authors:
José Batista Silva Neto, Helio Kuga, Antonio Fernando Bertachini A. Prado
Presenter: José Batista Silva Neto
doi://10.26678/ABCM.CONEM2018.CON18-0448
Abstract
The goal of the present research is to estimate the distance and the time of a flyby that a spacecraft make around the bodies of a system of asteroids that is composed by a main body with the largest mass and a secondary body, with a smaller mass that is orbiting the main body. Examples of systems like this are: 65803 Didymos, 1862 Apollo, 1866 Sisyphus e 3671 Dionysus. In a real situation, the position and velocity measurements are obtained by sensors, so it is necessary to consider in the model the noises originated from the sensor. An accurate orbit determination is of vital importance for the survival of the mission. Because a large inaccuracy in the measurements of the sensors can lead to the failure of this stage, leaving the spacecraft too far or too close and damaging the use of the cameras. Even a collision between the spacecraft and the objects of the system can occur. The results show that, using a method of estimation to reduce the error in the measurements coming from the sensors, to guarantee that the correct use of the cameras, estimating the distance of the bodies and the flight time as close as possible to the real ones. The correct estimation of the measurements will also be vital to detect possible collisions and to make the diversion maneuvers in time. A Kalman filter will be used for the determination of the parameters.
Keywords
spacecraft, estimation, Asteroid
