Print Email Facebook Twitter Helicopter Gas Turbine Engine Performance Analysis Title Helicopter Gas Turbine Engine Performance Analysis: A Multivariable Approach Author Arush, Ilan (National Test Pilot School) Pavel, M.D. (TU Delft Control & Simulation) Date 2017 Abstract Helicopter performance relies heavily on the available output power of the engine(s) installed. A simplistic single-variable analysis approach is often used within the flight-testing community to reduce raw flight-test data in order to predict the available output power under different atmospheric conditions. This simplistic analysis 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 capable of providing an improved estimation of engine performance and maximum available power. The MPOC method relies on optimization of a multivariable polynomial model subjected to equalities and inequalities constraints. The Karush-Khun-Tucker (KKT) optimization method is used with the engine operation limitations serving as inequalities constraints. The proposed MPOC method is applied to a set of flight-test data of a Rolls Royce/Allison MTU250-C20 gas turbine engine, installed on a MBB BO-105M helicopter. It is shown that the MPOC method can 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 current single-variable method to only 4.3hp using the MPOC method (over 300% improvement). Subject Gas turbinemultivariable linear regressionKarush–Khun–Tuckerhelicopter performanceflight testing To reference this document use: http://resolver.tudelft.nl/uuid:ba2c0753-7a4d-4079-a462-0eb45d68231a DOI https://doi.org/10.1177/0954410017741329 Embargo date 2018-12-01 ISSN 0954-4100 Source Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering Part of collection Institutional Repository Document type journal article Rights © 2017 Ilan Arush, M.D. Pavel Files PDF Helicopter_Gas_Turbine_En ... _JAero.pdf 837 KB Close viewer /islandora/object/uuid:ba2c0753-7a4d-4079-a462-0eb45d68231a/datastream/OBJ/view