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A generalised force equivalence-based modelling method for a dry wind-tunnel flutter test system

Published online by Cambridge University Press:  09 March 2021

Z. Zhang ,
B. Gao ,
J. Wang ,
D. Xu ,
G. Chen Open the ORCID record for G. Chen [Opens in a new window]  and
W. Yao
Z. Zhang
Affiliation:
Science and Technology on Reliability and Environment Engineering Laboratory, Beijing Institute of Structure and Environment Engineering, Beijing100076, China
B. Gao
Affiliation:
Science and Technology on Reliability and Environment Engineering Laboratory, Beijing Institute of Structure and Environment Engineering, Beijing100076, China
J. Wang
Affiliation:
Science and Technology on Reliability and Environment Engineering Laboratory, Beijing Institute of Structure and Environment Engineering, Beijing100076, China
D. Xu
Affiliation:
Shaanxi Province Key Laboratory for Service Environment and Control of Advanced Aircraft school of Aerospace Engineering, Xi’an Jiaotong University, Xi’an710049, China State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University, Xi’an710049, China
G. Chen*
Affiliation:
Shaanxi Province Key Laboratory for Service Environment and Control of Advanced Aircraft school of Aerospace Engineering, Xi’an Jiaotong University, Xi’an710049, China State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University, Xi’an710049, China
W. Yao
Affiliation:
Faculty of Computing Engineering and Media, De Montfort University, Queens Building The Gateway, Leicester, LE1 9BH, UK
*
aachengang@xjtu.edu.cn
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Abstract

Dry wind-tunnel (DWT) flutter test systems model the unsteady distributed aerodynamic force using various electromagnetic exciters. They can be used to test the aeroelastic and aeroservoelastic stability of smart aircraft or high-speed flight vehicles. A new parameterised modelling method at the full system level based on the generalised force equivalence for DWT flutter systems is proposed herein. The full system model includes the structural dynamic model, electromechanical coupling model and fast aerodynamic computation model. An optimisation search method is applied to determine the best locations for measurement and excitation by introducing Fisher’s information matrix. The feasibility and accuracy of the proposed system-level numerical DWT modelling method have been validated for a plate aeroelastic model with four exciters/transducers. The effects of key parameters including the number of exciters, the control time delay, the noise interference and the electrical parameters of the electromagnetic exciter model have also been investigated. The numerical and experimental results indicate that the proposed modelling method achieves good accuracy (with deviations of less than 1.5% from simulations and 4.5% from experimental test results for the flutter speed) and robust performance even in uncertain environments with a 10% noise level.

Keywords

AeroelasticityDry wind-tunnel systemGeneralised forceControl time delayOptimisation
Type
Research Article
Information
The Aeronautical Journal , Volume 125 , Issue 1286 , April 2021 , pp. 720 - 741
Copyright
© The Author(s), 2021. Published by Cambridge University Press on behalf of Royal Aeronautical Society

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Footnotes

A version of this paper was first presented at the International Symposium on Smart Aircraft, Xi’an, China, 2019.

References

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