@InProceedings{OliveiraKugaCarr:2015:AiBePl,
author = "Oliveira, Alexandre Macedo de and Kuga, H{\'e}lio Koiti and
Carrara, Valdemir",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)}",
title = "Air bearing platforms for simulation of spacecraft attitude
control systems",
booktitle = "Proceedings...",
year = "2015",
editor = "Steffen Junior, V. and Rade, D. A. and Bessa, W. M.",
organization = "International Symposium on Dynamic Problems of Mechanics, 17.",
publisher = "ABCM",
keywords = "air bearing, attitude control, satellite simulator, Kalman filter,
inertial systems.",
abstract = "This paper presents the development of two different air bearing
tables, which can simulate attitude control systems for satellites
with hardware-in-the-loop dynamics and control. Both systems are
based on gas-bearing platforms in which several sensors and
actuators were fixed. The first platform has a MEMS inertial
sensor, and the second platform has several sensors and actuators
that are engineering models similar to those usually employed in
satellites. A PC/104 computer commands the first platform, which
is responsible for driving 8 cold gas thrusters. On the other
hand, the second platform is based on a Renesas 32 bits processor,
which is responsible for three different subsystems: power supply,
data handling and attitude control. The actuators in this case are
reaction wheels and magnetic torque coils. The most important
process for the correct operation of the simulators is to ensure
accurate balancing of both platforms, because a difference between
the center of gravity of the platform and the center of rotation
of the bearing support may generate higher torques than those
normally encountered in the space environment, invalidating the
main feature of the simulator. Therefore, we use non-linear
filtering to obtain the platforms mass properties, including the
center of gravity position. Finally, we validate the mass
properties by implementing two simple attitude stabilization
controllers. Considerations on the nature of the friction of the
two platforms will also be made in the end of this paper.",
conference-location = "Natal, RN",
conference-year = "22-27 Feb.",
language = "en",
targetfile = "oliveira_air.PDF",
urlaccessdate = "27 abr. 2024"
}