Sensability and Excitability Metrics Applied to Navigation Systems Assessment

To evaluate the aptness of a navigation system in a particular application, the designer needs to assess its performance over typical trajectories travelled by the vehicle itself. Moreover, he or she may be required to judge which components of the kinematics state may be better estimated (and which...

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Bibliographic Details
Published in:Journal of navigation 2019-11, Vol.72 (6), p.1481-1495
Main Authors: España, Martín, Carrizo, Juan, Giribet, Juan I.
Format: Article
Language:English
Subjects:
Algorithms
Global positioning systems
GPS
Innovations
Kinematics
Navigation
Navigation systems
Principal components analysis
Remote sensing systems
Sensors
Sounding rockets
Spacecraft components
State estimation
Systems analysis
Trajectories
Vehicles
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Summary:To evaluate the aptness of a navigation system in a particular application, the designer needs to assess its performance over typical trajectories travelled by the vehicle itself. Moreover, he or she may be required to judge which components of the kinematics state may be better estimated (and which will not). The main contributions of this work are two novel and complementary performance measures that, in concert, allow for the assessment of a navigation system within the actual context of its application over specific trajectories. For a given on board instrumental configuration, the “excitability metric” permits the isolation of the contribution of the information conveyed by the vehicle's motion itself, while, the “sensability metric” measures the resultant overall quality of the kinematics state estimation. The same tools could help the designer planning appropriate vehicles manoeuvres in order to obtain a required precision for each estimated component. While emphasis is given on the mathematical justification of those metrics, their use is also illustrated with real flight data recorded from a sounding rocket.
ISSN:0373-4633
1469-7785
DOI:10.1017/S0373463319000328