Sensitivity analysis of model-based synthetic air data estimators

F. Adhika Pradipta Lie, Demoz Gebre-Egziabher

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Scopus citations

Abstract

The sensitivity of a synthetic air data system estimates of airspeed, angle of attack and sideslip angle to sensor output errors and aircraft model uncertainty is analyzed. The analysis shows that using low quality inertial sensors with large output errors requires a non-traditional, federated estimator architecture. With respect to model uncertainty, it is shown that a single linearized aircraft model can be used in lieu of a high-fidelity, non-linear model to provide reasonably accurate estimates of airspeed (less than 2 m/s error), angle of attack (less than 3 deg error), and sideslip angle (less than 5 deg error). This performance is shown to be relatively insensitive to off-trim attitudes but very sensitive to off-trim velocity. Methods for reducing the sensitivity to sensor error and model uncertainty are discussed. Flight test results are used to confirm the findings of the sensitivity analysis.

Original languageEnglish (US)
Title of host publicationAIAA Guidance, Navigation, and Control Conference, 2013
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Electronic)9781510801097
ISBN (Print)9781624103391
StatePublished - 2015
EventAIAA Guidance, Navigation, and Control Conference, 2015 - Kissimmee, United States
Duration: Jan 5 2015Jan 9 2015

Publication series

NameAIAA Guidance, Navigation, and Control Conference, 2013

Other

OtherAIAA Guidance, Navigation, and Control Conference, 2015
CountryUnited States
CityKissimmee
Period1/5/151/9/15

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