Nanosatellite Attitude Estimation with Uncertain Process and Measurement Noise Using Nontraditional Filtering

Chingiz Hajiyev, Demet Cilden-Guler*

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

Abstract

In this study the nontraditional attitude filtering algorithm integrates the Extended Kalman Filter (EKF) and Singular Value Decomposition (SVD) methods to calculate the attitude of a nanosatellite. Utilizing data from the magnetometer and Sun sensor, the SVD technique determines the attitude of the nanosatellite. The EKF is then provided with these attitude terms along with their error covariances, making the filter robust to changes in measurement noise. The Q (process noise covariance) adaption approach with multiple scale factors is suggested. This study shows that, the process noise bias and process noise increment type system changes will change the statistics of the EKF innovation. The theoretical basics of the Q-adaptive SVD-aided EKF with uncertain process noise mean and covariance are developed. Simulations are compared using the adaptive and non-adaptive versions of the nontraditional attitude filter in the presence of uncertain process and measurement noise.

Original languageEnglish
JournalProceedings of the International Astronautical Congress, IAC
Volume2023-October
Publication statusPublished - 2023
Event74th International Astronautical Congress, IAC 2023 - Baku, Azerbaijan
Duration: 2 Oct 20236 Oct 2023

Bibliographical note

Publisher Copyright:
Copyright © 2023 by the International Astronautical Federation (IAF). All rights reserved.

Keywords

  • Nanosatellite, attitude estimation
  • extended Kalman filter
  • process noise
  • singular value decomposition

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