ATTITUDE CONTROL SYSTEM FOR STABILIZED THREE-AXIS SATELLITE ON LOW INCLINATION ORBIT

摘要

TITLE of THE INVENTION Attitude control system for stabilized 3-axis satellite in low tilt orbit TEXT OF The A roll / yaw attitude control system for a stabilized 3-axis satellite in at least one orbit approximately comprises a processing circuit connected between a roll, yaw and pitch attitude detection device, comprising a terrestrial detector (28) and a stellar detector (29) adapted to detect the Polar Star; and an actuating device comprising a kinetic moment assembly substantially oriented along the pitch axis (21, 22) and a magnetic dipole generator assembly (24, 25) disposed at least approximately in a roll / yaw plane. This processing circuit includes a short-term roll / yaw control loop adapted to estimate the angular values and angular velocities of roll and yaw attitude, and to determine setpoint signals (64) intended for certain elements of the device. actuation (21, 22), a long-term roll / yaw control loop (100) adapted to estimate the angular values of attitude and the external roll / yaw disturbances and determine a dipole signal to be applied to the magnetic dipole generator assembly, or emergency actuators. (Figure 8)