Identification of helicopter rigid body dynamics from flight data

Singh, Jatinder and Girija, G (1998) Identification of helicopter rigid body dynamics from flight data. Defence Science journal, 48 (1). pp. 69-86. ISSN 0011-748X

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Abstract

This paper discusses helicopter modeling and identification related aspects. By applying the system identification methodology, longitudinal, and lateral-directional rigid body helicopter dynamics are identified from flight data. Aerodynamic parameters from single input excitation, as well as multimaneuver evaluation, are estimated utilizing output-error approach. The formulated mathematical models yield adequate fits to measured time histories. Results obtained from the proof-of-match for model validation indicate that the identified derivatives can satisfactorily predict longitudinal dynamics to a given arbitrary input. It is further demonstrated that lateral body dynamics can be adequately predicted by including cross-coupling terms in the estimation model.

Item Type: Journal Article
Uncontrolled Keywords: Mathematical models;dynamics;helicopters;identification;excitation; aerodynamics
Subjects: AERONAUTICS > Aircraft Stability and Control
Division/Department: Flight Mechanics and Control Division, Flight Mechanics and Control Division
Depositing User: M/S ICAST NAL
Date Deposited: 03 Oct 2006
Last Modified: 24 May 2010 09:51
URI: http://nal-ir.nal.res.in/id/eprint/2837

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