Optimal control of a compound rotorcraft for engine performance enhancement

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dc.contributor.authorScullion, Calum
dc.contributor.authorVouros, Stavros
dc.contributor.authorGoulos, Ioannis
dc.contributor.authorNalianda, Devaiah
dc.contributor.authorPachidis, Vassilios
dc.date.accessioned2021-01-20T15:25:39Z
dc.date.available2021-01-20T15:25:39Z
dc.date.issued2021-01-11
dc.description.abstractDemands for rotorcraft with increased flight speed, improved operational performance and reduced environmental impact have led to a drive in research and development of alternative concepts. Compound rotorcraft overcome the flight speed limitations of conventional helicopters with additional lifting and propulsive components. Further to operational benefits, these augmentations provide additional flight control parameters, resulting in control redundancy. This work aims to investigate the impact of optimal control strategies for a generic coaxial compound rotorcraft, equipped with turboshaft engines, targeting the minimization of mission fuel burn and gaseous emissions. The direct redundant controls considered are: (a) main rotor speed, (b) propeller speed, and (c), fuselage pitch attitude. A simulation tool for coaxial compound rotorcraft analysis has been developed and coupled to a zero-dimensional engine performance model and a stirred-reactor combustor model. Firstly, experimental and flight test data were used to provide extensive validation of the developed models. A parametric analysis was then carried out to gain insight into the effect of the redundant controls. This was followed by the derivation of a generalized set of optimal redundant control allocations using a surrogate-assisted genetic algorithm. Application of the optimal redundant control allocations during realistic operational scenarios has demonstrated reductions in fuel burn and NOX of up to 6.93% and 8.74% respectively. The developed method constitutes a rigorous approach to guide the design of control systems for future advanced rotorcraften_UK
dc.identifier.citationScullion C, Vouros S, Goulos I, et al., (2020) Optimal control of a compound rotorcraft for engine performance enhancement. In: ASME Turbo Expo 2020, 21-25 September 2020, London, Virtual Event. Paper number GT2020-16280en_UK
dc.identifier.urihttps://doi.org/10.1115/GT2020-16280
dc.identifier.urihttps://asmedigitalcollection.asme.org/GT/proceedings/GT2020/84058/Virtual,%20Online/1094321
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/16211
dc.language.isoenen_UK
dc.publisherASMEen_UK
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectaerospaceen_UK
dc.subjectaerodynamicsen_UK
dc.subjectenvironmental impacten_UK
dc.subjectgas turbinesen_UK
dc.subjectoptimizationen_UK
dc.subjectcoaxial rotoren_UK
dc.subjectcompound rotorcraften_UK
dc.titleOptimal control of a compound rotorcraft for engine performance enhancementen_UK
dc.typeConference paperen_UK

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