The Resource Observability-enhanced dual-filter design for attitude estimation with minimum observations, by Jason David Searcy

Observability-enhanced dual-filter design for attitude estimation with minimum observations, by Jason David Searcy

Label
Observability-enhanced dual-filter design for attitude estimation with minimum observations
Title
Observability-enhanced dual-filter design for attitude estimation with minimum observations
Statement of responsibility
by Jason David Searcy
Creator
Author
Subject
Language
eng
Summary
"Determining spacecraft attitude in real time using only magnetometer data presents a challenging filtering problem. A flexible and computationally efficient method for solving the spacecraft attitude using only an inexpensive and reliable magnetometer would be a useful option for satellite missions, particularly those with modest budgets. The primary challenge is that magnetometers only instantaneously resolve two axes of the spacecraft attitude. Typically, magnetometers are used in conjunction with other sensors to resolve all three axes. However, by using a filter over an adequately long orbit arc, the magnetometer data can yield full attitude, and in near real time. The method presented solves the problem using a two-nested extended Kalman filter as a means to improve convergence. In the first filter, the magnetic field data are filtered to obtain the magnetic field derivative vector, which is combined with the magnetic field vector in the second filter to fully resolve the attitude. As revealed by a literature review and previous research by the author, this method fails to accurately estimate the attitude unless the spacecraft is spin-stabilized with a relatively high angular velocity. To address this limiting restriction, the observability of the problem is examined from an analytical perspective. This study separates the problem into two stages and considers different methods for solving each stage. The first estimates the magnetic field derivative and possibly the angular rates, and then uses this information to calculate the attitude in the second stage. A new dynamic model is developed to estimate angular rates without estimating the attitude quaternion. MATLAB numerical routines are used to solve the complex nonlinear system of equations to yield a deterministic method. Finally, a parametric study analyzes the accuracy and utility of this method for different orbit trajectories and angular rates"--Abstract, page iii
Member of
Cataloging source
UMR
http://library.link/vocab/creatorDate
1984-
http://library.link/vocab/creatorName
Searcy, Jason D.
Degree
Ph. D.
Dissertation year
2013
Granting institution
Missouri University of Science and Technology
Illustrations
illustrations
Index
no index present
Literary form
non fiction
Nature of contents
  • dictionaries
  • bibliography
  • theses
http://library.link/vocab/subjectName
  • Artificial satellites
  • Space vehicles
  • Magnetometers
Label
Observability-enhanced dual-filter design for attitude estimation with minimum observations, by Jason David Searcy
Instantiates
Publication
Note
Vita
Bibliography note
Includes bibliographic references (pages 139-141)
Carrier category
online resource
Carrier category code
  • cr
Carrier MARC source
rdacarrier
Content category
text
Content type code
  • txt
Content type MARC source
rdacontent
Control code
870654394
Extent
1 online resource (xii, 142 pages)
Form of item
online
Governing access note
These materials are protected under copyright by the original author
Media category
computer
Media MARC source
rdamedia
Media type code
  • c
Other physical details
illustrations.
Specific material designation
remote
System control number
(OCoLC)870654394
Label
Observability-enhanced dual-filter design for attitude estimation with minimum observations, by Jason David Searcy
Publication
Note
Vita
Bibliography note
Includes bibliographic references (pages 139-141)
Carrier category
online resource
Carrier category code
  • cr
Carrier MARC source
rdacarrier
Content category
text
Content type code
  • txt
Content type MARC source
rdacontent
Control code
870654394
Extent
1 online resource (xii, 142 pages)
Form of item
online
Governing access note
These materials are protected under copyright by the original author
Media category
computer
Media MARC source
rdamedia
Media type code
  • c
Other physical details
illustrations.
Specific material designation
remote
System control number
(OCoLC)870654394

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