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ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
Real-time Estimation of the Airspeed and the Heat Transfer Coefficient of an Aeronautical Pitot Tube Undergoing Ice Accretion
Submission Author:
Steve Diniz , RJ
Co-Authors:
Steve Diniz, César Cunnha Pacheco
Presenter: Steve Diniz
doi://10.26678/ABCM.ENCIT2020.CIT20-0124
Abstract
This paper presents the use of the Kalman filter technique for real-time estimation of the airspeed and heat transfer coefficient at the tip of an aeronautical Pitot tube undergoing ice accretion. Based on previous works and models available in the literature a new framework is developed for replacing the typical batch estimation process by an approach in which the inverse problem is recasted as a state estimation problem that can be solved using the Kalman filter technique. The forward problem consists of an one dimensional transient heat conduction model used in previous works and a lumped analysis. A Fortran90 algorithm was developed for Kalman filter implementation and a good agreement between reference and estimated airspeed, temperature and convective heat transfer coefficient is observed, thus proving the proposed approach to be robust. The algorithm developed require a low performance computer hardware and can estimate in real-time the sought parameters.
Keywords
Kalman Filter, Inverse problem, Ice accretion, Pitot tube, Recursive estimator
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