Non-traditional robust UKF against attitude sensors faults

Date

2017-06-07

Author

Söken, Halil Ersin
Çilden Güler, Demet

Metadata

Show full item record

Item Usage Stats

67
views

0
downloads

Two non-traditional approaches for nanosatellite attitude estimation are investigated. In the non-traditional approach for attitude filtering the magnetometer and Sun sensor measurements are first used in the Singular Value Decomposition (SVD) algorithm to determine the spacecraft's attitude. Then the attitude estimates from the SVD are fed into the Unscented Kalman Filter (UKF) for getting finer attitude estimates and estimating the attitude rate. In the first case, this algorithm is used without any further modification for sensor faults. In the second case the SVD-aided UKF is adapted against the sensor measurement faults. For adaptation the filter's measurement noise covariance (R) matrix is tuned with a scale factor. The filters-the SVD-aided UKF (SVD/UKF) and the SVD-aided Robust UKF (SVD/RUKF)-are tested in two different fault scenarios: constant continuous bias and measurement noise increment. Fault scenarios are repeated for both sun sensor and magnetometer. The results indicate the non-traditional approach is inherently robust against the sensor faults as vector measurements are first pre-processed in the SVD before running the UKF.

Subject Keywords

Unscented Kalman filter, Sensor fault, Attitude estimation, Nanosatellite, Non-traditional approach

URI

https://issfd.org/ISSFD_2017/paper/ISTS-2017-d-077__ISSFD-2017-077.pdf
https://hdl.handle.net/11511/77657

Conference Name

International Symposium on Space Flight Dynamics, (03 - 09 Haziran 2017)

Collections

Department of Aerospace Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

Analysis of Argumentation and Questioning Patterns in Argument-Based Inquiry Classrooms GÜNEL, MURAT; Kingir, Sevgi; Geban, Ömer (2012-04-01) The purpose of this study was to analyze the argument-based inquiry approach implementations with respect to questioning in the classrooms. In addition, the study aimed to explore the relationship between levels of questioning and negotiation of ideas. The study was conducted with three teachers and 146 students. The video transcripts obtained from these teachers' classrooms were analyzed through discourse analysis. The findings indicated that teachers' questioning and implementation level are two crucial f...
Estimation of response errors in complex sample surveys Fahmi, Fidan Mahmut; Öztaş, H. Ayhan; Batmaz, İnci; Department of Statistics (2013) In this thesis, simple and correlated response errors are investigated. The optimum interviewer allocation settings has been investigated by using different experimental design models (Nested design, Nested and factorial factors design and Split plot design). The proposed designs considers several stages of an interactive process. Several linear and multiplicative models have been used to explain the factors effecting nonsampling errors. This naturally includes response error models. The response error mode...
A DATA DRIVEN PERFORMANCE EVALUATION FRAMEWORK FOR SPORTS ANALYTICS Aydemir, Ayşe Elvan; Taşkaya Temizel, Tuğba; Temizel, Alptekin; Department of Bioinformatics (2021-9-08) Performance evaluation is a challenging, multidimensional and multi-criteria assessment problem. One application area is the player transfers in football (soccer), where player performance must be evaluated in-line with their responsibilities on the field. In this area of study, raw player performance statistics are not representative because of the external factors impacting the performance such as time-played, injuries, competition difficulty and characteristics, strength of the opponent, impact of action...
Uncertainty quantification of parameters in local volatility model via frequentist, bayesian and stochastic galerkin methods Animoku, Abdulwahab; Uğur, Ömür; Department of Financial Mathematics (2018) In this thesis, we investigate and implement advanced methods to quantify uncertain parameter(s) in Dupire local volatility equation. The advanced methods investigated are Bayesian and stochastic Galerkin methods. These advanced techniques implore different ideas in estimating the unknown parameters in PDEs. The Bayesian approach assumes the parameter is a random variable to be sampled from its posterior distribution. The posterior distribution of the parameter is constructed via “Bayes theorem of inverse p...
Pseudo-Linear Kalman Filter for Attitude Estimation of a Spinning Nanosatellite Söken, Halil Ersin; Kallio, Esa; Visala, Arto; Selkainaho, Jorma (null; 2017-06-09) This paper presents the pseudo-linear estimation approach to the high-rate spinning small spacecraft attitude estimation problem. The sensor suit utilised in the presented approach uses gyro, magnetometer and sun-sensor measurements. The presented estimation technique has been designed particularly for the problem of attitude determination during the Aalto-1 nanosatellite's Plasma Brake Experiment (PBE). The design of the PBE demands the satellite to be spun up to 200 deg/s for deploying the tether by the u...

Citation Formats

H. E. Söken and D. Çilden Güler, “Non-traditional robust UKF against attitude sensors faults,” Matsuyama, Japonya, 2017, p. 1, Accessed: 00, 2021. [Online]. Available: https://issfd.org/ISSFD_2017/paper/ISTS-2017-d-077__ISSFD-2017-077.pdf.