Identification of Helicopter Rigid Body Dynamics from Flight Data.

  • Jatinder Singh National Aerospace Laboratories, Bangalore
  • G. Girija National Aerospace Laboratories, Bangalore
Keywords: Mathematical models, Aerodynamic parameters, Directional rigid body

Abstract

This paper discusses helicopter modelling and identification related aspects. By applying thesystem identification methodology, longitudinal and lateral-directional rigid body helicopter dynamics are identified from flight data. Aerodynamic parameters from single input excitation as wellas multimanoeuver evaluation are estimated utilising output-error approach. The formulatedmathematical models yield adequate fit to measured time histories. Results obtained from the proof-of-match for model validation indicate that the identified derivatives can satisfactorily predictlongitudinal dynamics to a given arbitrary input. It is further demonstrated for the present study thatlateral body dynamics can be adequately predicted by including cross-coupling terms in the estimation model.

Author Biographies

Jatinder Singh, National Aerospace Laboratories, Bangalore
Dr Jatinder Singh obtained his PhD in Aerospace Engineering from Indian Institute of Technology,Kanpur, in 1993. Presently, he is working at Flight Mechanics and Control Division of the National Aerospace Laboratories (NAL), Bangalore. His areas of work include aircraft aerodynamic modelling and parameter estimation. He is a recipient of Alexander von Humboldt Fellowship. Healso worked as Guest Scientist at the German Aerospace Research Establishment (DLR), Institute ofFlight Mechanics in Braunschweig, Germany, before joining NAL in 1996. He is a member of Ae.S.1 and  AIAA, USA.
G. Girija, National Aerospace Laboratories, Bangalore
Dr (Mrs)G Girija received her PhD (Physics) from the Bangalore University .in 1996.Presently, she is working at Flight Mechanics and Control Division of the National Aerospace Laboratories (NAL), Bangalore. Her areas. of research include modelling and parameter estimation of aerospace vehicles. She is a recipient of NAL Foundation Day Award. She also worked as Guest Scientist at the German Aerospace Research/Establishment (DLR), Institute of Flight Mechanics, in Braunschweig, Germany, in 1990. She is a member ofAe.S.1 and IEEE, USA.86.

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Published
2013-01-01
How to Cite
Singh, J., & Girija, G. (2013). Identification of Helicopter Rigid Body Dynamics from Flight Data. Defence Science Journal, 48(1), 69-86. https://doi.org/10.14429/dsj.48.3869