Using the -Bdot Algorithm to Reduce the Angular Velocity of Rotation for the Aist Small Spacecraft Pilot Model

Abstract

This article considers the issues of reducing the angular velocity of rotation for a small spacecraft operated in uncontrolled flight. A mathematical model based on Euler’s dynamic equations in the main coupled coordinate system of a small spacecraft has been constructed. The transition of the inertia tensor of the Aist small spacecraft pilot model from the bench coordinate system to the main connected coordinate system was performed. A study and evaluation of the significance of various disturbing factors in modeling the rotational motion of a small spacecraft around the center of mass has been carried out. At the same time, gravitational, aerodynamic and magnetic disturbing factors are considered. The application of the -Bdot algorithm by magnetic executive bodies to reduce the angular velocity has been studied. Results are obtained demonstrating the effectiveness of the -Bdot algorithm application on the example of the Aist small spacecraft pilot model. The results of the presented work can be used in the development of effective algorithms for controlling the movement of a small spacecraft around the center of mass in order to reduce the angular velocity of its rotational motion.