NANOSATELLITE ATTITUDE ESTIMATION IN SUN AND ECLIPSE PERIODS WITHOUT GYROSCOPES


Hajiyev C., Çilden Güler D.

APPLIED AND COMPUTATIONAL MATHEMATICS, vol.21, no.3, pp.246-258, 2022 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 21 Issue: 3
  • Publication Date: 2022
  • Doi Number: 10.30546/1683-6154.21.3.2022.246
  • Journal Name: APPLIED AND COMPUTATIONAL MATHEMATICS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Communication Abstracts, Metadex, zbMATH, Civil Engineering Abstracts
  • Page Numbers: pp.246-258
  • Keywords: Eclipse, Attitude, Estimation, Nanosatellite
  • Istanbul Technical University Affiliated: Yes

Abstract

The paper introduces attitude estimation methods for sun/eclipse periods without gyroscope measurements. Traditional attitude estimation approach with nonlinear measure-ments and non-traditional approach with linear measurements are investigated relying on sen-sor measurements from magnetometer, and sun sensor at the first stage. For the nontraditional approach, vectors are placed in Wahbas problem and the loss function is minimized by Singular Value Decomposition (SVD) method. The outputs of the SVD are used in the extended Kalman filter (EKF) in order to estimate the satellites attitude angles and angular rates. For the second stage in eclipse period, two additional methods are introduced as the prediction method, and traditional EKF based on only magnetometer measurements. For different phases, a switching algorithm is used for better attitude and rate estimation accuracy.