Simulation of coupled helicopter-slung load-pilot dynamics

Jacob Enciu, Aviv Rosen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

A nonlinear simulation of a helicopter carrying a fin stabilized underslung load was developed. A human pilot model was incorporated in the simulation, for the study of the dynamics and stability of the combined helicopter-slung load-pilot system. Simulation results and their subsequent analysis show that the underslung load is stabilized by the helicopter. Analysis using extended bifurcations confirms observations from flight tests regarding the critical role of the piloting technique in determining the system's stability. Pilot attempts to counteract load lateral oscillations by applying lateral stick commands, turn the system unstable and result in pilot induced oscillations. Freezing the lateral stick causes load oscillations to completely decay, or damp down to very low residual amplitudes. Pilot time delay is found to be the main factor affecting the system's instability.

Original languageEnglish (US)
Title of host publication70th American Helicopter Society International Annual Forum 2014
PublisherAmerican Helicopter Society
Pages335-361
Number of pages27
ISBN (Print)9781632666918
StatePublished - Jan 1 2014
Event70th American Helicopter Society International Annual Forum 2014 - Montreal, QC, Canada
Duration: May 20 2014May 22 2014

Publication series

NameAnnual Forum Proceedings - AHS International
Volume1
ISSN (Print)1552-2938

Other

Other70th American Helicopter Society International Annual Forum 2014
CountryCanada
CityMontreal, QC
Period5/20/145/22/14

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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  • Cite this

    Enciu, J., & Rosen, A. (2014). Simulation of coupled helicopter-slung load-pilot dynamics. In 70th American Helicopter Society International Annual Forum 2014 (pp. 335-361). (Annual Forum Proceedings - AHS International; Vol. 1). American Helicopter Society.