Flight testing and analysis of helicopter gas turbine engine performance - A multivariable approach

dc.contributor.author Arush, I.
dc.contributor.author Pavel, M.
dc.date.accessioned 2021-03-04T15:52:28Z
dc.date.available 2021-03-04T15:52:28Z
dc.date.issued 2018
dc.description.abstract Helicopter performance flight-testing is an expensive activity that requires efficient testing techniques and appropriate data analysis for good performance prediction. Regarding the flight testing techniques used to evaluate the available power of a Turboshaft engine, current methodologies involve a simplistic single-variable polynomials analysis of the flight test data. This simplistic approach often results in unrealistic predictions. This paper proposes a novel method for analyzing flight-test data of a helicopter gas turbine engine. The so-called 'Multivariable Polynomial Optimization under Constraints' (MPOC) method is proven capable of providing an improved estimation of the engine maximum available power. The MPOC method relies on maximization of a multivariable polynomial subjected to both equalities and inequalities constraints. The Karush-Khun-Tucker (KKT) optimization technique is used with the engine operating limitations serving as inequalities constraints. The proposed MPOC method is implemented to a set of flight-test data of a Rolls Royce/Allison MTU250-C20 gas turbine, installed on a MBB BO-105M helicopter. It is shown that the MPOC method can realistically predict the engine output power under a wider range of atmospheric conditions and that the standard deviation of the output power estimation error is reduced from 13hp in the single-variable method to only 4.3hp using the MPOC method (over 300% improvement).
dc.identifier.other 33 - Flight Testing and Analysis of Gas Turbine Engine Performance - A Multivariable Approach.pdf
dc.identifier.uri http://hdl.handle.net/20.500.11881/3946
dc.language.iso en
dc.title Flight testing and analysis of helicopter gas turbine engine performance - A multivariable approach
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