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Capturing nonlinear time-dependent aircraft dynamics using a wind tunnel manoeuvre rig

Capturing nonlinear time-dependent aircraft dynamics using a wind tunnel manoeuvre rig
Capturing nonlinear time-dependent aircraft dynamics using a wind tunnel manoeuvre rig
This paper considers a novel multi-degree-of-freedom dynamic manoeuvre rig, with the aim of assessing its potential for capturing aircraft model nonlinear time dependent dynamics in the wind tunnel. The dynamic manoeuvre rig capabilities are demonstrated via a series of experiments involving a model aircraft in a closed section low-speed wind tunnel. A series of open loop experiments show that the aircraft model exhibits nonlinear time dependent dynamics. This nonlinear behaviour manifests itself as limit cycle oscillations that increase in complexity with the number of degrees-of-freedom in which the aircraft is allowed to move. Two real-time closed loop control experiments further illustrate the manoeuvre rig potential: first, using a pitch motion configuration, an experiment is conducted to investigate the limit cycle behaviour in more detail, allowing the stability properties of the pitch oscillations to be assessed; secondly, using a 5-DOF motion configuration, the test motion envelope is extended by using a compensating feedback control law to track the aircraft's roll motion. Together, these experiments demonstrate the manoeuvre rig potential to reveal aircraft nonlinear and unsteady phenomena.
Aerodynamic hysteresis, Bifurcations, Dynamic testing, Limit cycle oscillations, Nonlinear dynamics, Wind tunnel
1270-9638
Araujo-Estrada, Sergio A.
87793c63-f2bd-4169-b93d-ec1525909a7a
Lowenberg, Mark H.
7d48bdd0-8a77-4bba-8b58-b295ccb8eeb2
Neild, Simon A.
e11b68bb-ddff-4cac-a8a7-798cc3cc3891
Araujo-Estrada, Sergio A.
87793c63-f2bd-4169-b93d-ec1525909a7a
Lowenberg, Mark H.
7d48bdd0-8a77-4bba-8b58-b295ccb8eeb2
Neild, Simon A.
e11b68bb-ddff-4cac-a8a7-798cc3cc3891

Araujo-Estrada, Sergio A., Lowenberg, Mark H. and Neild, Simon A. (2022) Capturing nonlinear time-dependent aircraft dynamics using a wind tunnel manoeuvre rig. Aerospace Science and Technology, 121, [107325]. (doi:10.1016/j.ast.2021.107325).

Record type: Article

Abstract

This paper considers a novel multi-degree-of-freedom dynamic manoeuvre rig, with the aim of assessing its potential for capturing aircraft model nonlinear time dependent dynamics in the wind tunnel. The dynamic manoeuvre rig capabilities are demonstrated via a series of experiments involving a model aircraft in a closed section low-speed wind tunnel. A series of open loop experiments show that the aircraft model exhibits nonlinear time dependent dynamics. This nonlinear behaviour manifests itself as limit cycle oscillations that increase in complexity with the number of degrees-of-freedom in which the aircraft is allowed to move. Two real-time closed loop control experiments further illustrate the manoeuvre rig potential: first, using a pitch motion configuration, an experiment is conducted to investigate the limit cycle behaviour in more detail, allowing the stability properties of the pitch oscillations to be assessed; secondly, using a 5-DOF motion configuration, the test motion envelope is extended by using a compensating feedback control law to track the aircraft's roll motion. Together, these experiments demonstrate the manoeuvre rig potential to reveal aircraft nonlinear and unsteady phenomena.

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More information

Accepted/In Press date: 31 December 2021
e-pub ahead of print date: 13 January 2022
Published date: 19 January 2022
Keywords: Aerodynamic hysteresis, Bifurcations, Dynamic testing, Limit cycle oscillations, Nonlinear dynamics, Wind tunnel

Identifiers

Local EPrints ID: 469028
URI: http://eprints.soton.ac.uk/id/eprint/469028
ISSN: 1270-9638
PURE UUID: 3e8674d4-249d-41d8-8e02-27142ce19144
ORCID for Sergio A. Araujo-Estrada: ORCID iD orcid.org/0000-0002-5432-5842

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Date deposited: 05 Sep 2022 16:55
Last modified: 06 Sep 2022 02:05

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Contributors

Author: Sergio A. Araujo-Estrada ORCID iD
Author: Mark H. Lowenberg
Author: Simon A. Neild

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