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COBEM 2023
27th International Congress of Mechanical Engineering
Attitude Determination and Control of a Nanosatellite Detector of Cosmic Sources of X and Gamma Rays
Submission Author:
Matheus Soares , SP
Co-Authors:
Matheus Soares, Luiz de Siqueira Martins Filho, Leandro Baroni, Otavio Durão, VALTER SCHAD
Presenter: Matheus Soares
doi://10.26678/ABCM.COBEM2023.COB2023-0647
Abstract
NANOMIRAX is a 2U CubeSat nanosatellite whose payload consists of an experiment to detect and localize hard X-rays/gamma rays from cosmic explosions called “Localizador de Explosões Cósmicas de Raio-X” (LECX – Portuguese for Locator of X-ray Cosmic Explosions), composed by detectors with 53°×53° of a field of view. For this mission purpose, the experiment should not be pointed toward Earth, but rather around the zenith direction of the orbit. The control, using active magnetic actuators, has three modes: detumbling, limit zone and slowdown. The first and third ones aims to decrease the angular velocity of the satellite about a main axis. The second aims to prevent the sensors from being pointed towards the center of the Earth and to maximize the radiation search area. The modeling of the NANOMIRAX orbital and attitude movement was validated in numerical simulations, considering the conditions planned for the mission in terms of orbit, the strategy of attitude determination, and the three modes control to calculate the torques to be produced with magnetorquers. The simulations considered the magnetization and demagnetization cycles for electromagnetic actuation.
Keywords
Magnetic attitude control, attitude determination, attitude control, B-dot control, cubesat
