Low-orbit satellite two-degree-of-freedom solar wing control method

Abstract

The embodiment of the invention discloses a low-orbit satellite two-degree-of-freedom solar wing control method, which comprises the following steps: S1, acquiring the angular velocity of a satellite, judging whether the absolute value of the angular velocity is greater than a velocity threshold value, if yes, setting a control instruction of a rotating shaft and a swinging shaft of a solar wing as a stalling keeping instruction, and then performing S5, otherwise, performing S2; S2, acquiring a sun vector in a satellite body system, and converting the sun vector into an orbital coordinate system; S3, calculating an included angle between the orbital plane and the sun vector, judging whether the absolute value of the included angle is smaller than an angle threshold value or not, if so, setting the solar wing as continuous sun tracking control, and otherwise, setting the solar wing as fixed-angle sun tracking control; S4, judging whether the rotating shaft and the swinging shaft of the solar wing are controlled at the same time, if yes, executing S5, and otherwise, adjusting the instruction of the rotating shaft; and S5, outputting control instructions of the rotating shaft and the swinging shaft to control the solar wing to move.

Description

technical field [0001] The invention relates to the technical field of spacecraft control. More specifically, it relates to a method for controlling a two-degree-of-freedom solar wing of a low-orbit satellite. Background technique [0002] Internet access anytime, anywhere is the most important feature of the current information age. Many foreign companies such as OneWeb and SpaceX have proposed large-scale low-orbit broadband satellite constellation systems, planning to provide Internet access services anytime, anywhere for the world. [0003] Low-orbit broadband satellites need to adopt non-sun-synchronous orbits, resulting in periodic and large-scale changes in the angle between the sun and the orbital plane. When the sun shines on the orbital plane vertically, the solar wings on the vertical orbital plane cannot obtain energy. Therefore, if a satellite in a non-sun-synchronous orbit is only equipped with a single-degree-of-freedom solar wing, in order to realize the sol...

AI Technical Summary

Problems solved by technology

[0003] Low-orbit broadband satellites need to adopt non-sun-synchronous orbits, resulting in periodic and large-scale changes in the angle between the sun and the orbital plane. When the sun shines on the orbital plane vertically, the solar wings on the vertical orbital plane cannot obtain energy

Therefore, if a satellite in a non-sun-synchronous orbit is only equipped with a single-degree-of-freedom solar wing, in order to realize the solar wing's orientation to the sun, the satellite needs to perform periodic large-angle attitude maneuvers, which will cause the satellite's working process to be periodically interrupted, and The periodic attitude maneuver of the satellite destroys the existing attitude stability. After the maneuver is completed, the stable attitude needs to be re-established, which will also bring the risk of uncertainty to the satellite attitude control system.

Images