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Hydraulic actuation system modeling: an analysis of high frequency modeling

The objective of this work was to develop a high fidelity model representative up to high frequencies of a Flight Control System with hydraulic actuation on active-active mode. The usage of a Fly-By-Wire architecture and hydraulic actuation system on active-active mode has brought new engineering challenges like the force-fight between actuators and its structure fatigue life consumption on normal and failure scenarios such as oscillatory mal-functions. Once that these failure modes can exist up to high frequencies, it makes necessary the development of a high fidelity model of a flight control system representative up to high frequencies. The model herein developed has a high fidelity model of an EHSV, hydraulic actuator, a position loop and the control surface, as well as other models complementary in order that it can be possible to analyze the whole system up to high frequencies. It was analyzed the performance of the model at step input response and frequency response, showing to be a model close to the expected response of a real system. Also it was analyzed the frequency response of its components showing to be a representative model up to high frequencies. Besides the performance analysis, it was studied the behavior on a oscillatory mal-function scenario, showing the expected level of structure load, as well as its fatigue life consumption, showing the need to monitor these types of failures.
Date28 April 2010
CreatorsCarlos Augusto Constantino
ContributorsLuiz Carlos Sandoval Góes, Fernando José de Oliveira Moreira
PublisherInstituto Tecnológico de Aeronáutica
Source SetsIBICT Brazilian ETDs
Detected LanguageEnglish
Typeinfo:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis
Sourcereponame:Biblioteca Digital de Teses e Dissertações do ITA, instname:Instituto Tecnológico de Aeronáutica, instacron:ITA

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