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Study of prognostic algorithms for electrohydraulic actuators applied to aerospace systems

Leonardo Forletta

Study of prognostic algorithms for electrohydraulic actuators applied to aerospace systems.

Rel. Matteo Davide Lorenzo Dalla Vedova, Paolo Maggiore, Pier Carlo Berri. Politecnico di Torino, Corso di laurea magistrale in Ingegneria Aerospaziale, 2020

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Abstract:

The purpose of this dissertation is to conduct prognostic analysis on a numerical model of an electrohydraulic actuator - used in aerospace environments - to permit early proactive maintenance on the physical system, beneficial for its lifespan extension. The detailed model of a flapper-nozzle servo valve is used to help identify and analyze possible alterations on the dynamical response by applying several types of commands and faults (single or multiple). The main types of commands used in this study are: a basic ramp command, a chirp command with decrescent amplitude, and a mixed time-history command for prognostic purposes. The faults I examined are backlash and increasing dynamic friction on the actuation jack. A comparation between the responses of the detailed model and of a simpler monitoring model is presented to evaluate appreciable differences. Then, the parameters of the monitoring model are modified through appropriate optimisation algorithms to minimize errors between the dynamic responses of the two models. Fault identification is achieved through the correlation of their scale with the variation of aforementioned parameters.

Relatori: Matteo Davide Lorenzo Dalla Vedova, Paolo Maggiore, Pier Carlo Berri
Anno accademico: 2020/21
Tipo di pubblicazione: Elettronica
Numero di pagine: 113
Soggetti:
Corso di laurea: Corso di laurea magistrale in Ingegneria Aerospaziale
Classe di laurea: Nuovo ordinamento > Laurea magistrale > LM-20 - INGEGNERIA AEROSPAZIALE E ASTRONAUTICA
Aziende collaboratrici: NON SPECIFICATO
URI: http://webthesis.biblio.polito.it/id/eprint/16820
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