A Smooth Nadir-Pointing Attitude Guidance law for Satellites Constrained by the Deviation of Sun-Pointing. Issue 1 (1st October 2022)

• Record Type: Journal Article
• Authors: Yang, Zhibo; Qin, Yang; Liu, Jia; Sun, Ningbo; Huo, Da; Ji, Haoran; Cong, Qiang; Li, Yanzhang
• Is Part Of: Journal of physics. Volume 2361: Issue 1(2022)
• Publication Date: 2022-10-01
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/2361/1/012020
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract : This paper proposes a novel nadir-pointing guidance method for satellites constrained by the deviation of sun-pointing, to ensure the attitude of the satellite steering smoothly. The main idea of establishing the expected attitude contains two steps. Firstly, establishing a temporary attitude according to the nadir direction and the normal direction of the ecliptic. Secondly, in order to reduce the deviation between the expected Sun-pointing axis and the Sun-pointing direction, the temporary attitude will be rotated along one Euler axis, and ensure that the expected nadir-pointing axis fixed in the nadir direction at the same time. The nadir-pointing method provided in this paper overcomes the singular phenomenon that the expected attitude of the satellite flips, without serious loss of Sun-pointing. In this way, the peak expected angular velocity and the peak power consumption will be greatly reduced.