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| Identification and Modification of Aircraft's Dynamic Characteristics by Control Surfaces' Oscillation Excitation Flight Test |
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| DOI：10.7643/issn.1672-9242.2022.09.012 |
| KeyWord:oscillatory failure flight test dynamic response frequency characteristic model modification |
| Author | Institution |
| ANG Pei-sen |
Shanghai Aircraft Design & Research Institute, Shanghai , China |
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| Abstract: |
| Through flight test, this paper aims to identify the dynamic characteristics of the aircraft, including the modal frequency, control surface efficiency, damp and so on, to modify the dynamic response analysis model of aircraft. Although control surface oscillation is a kind of failure for fly-by-wire aircraft, it can be actively applied to flight test as a frequency domain excitation on aircraft to obtain frequency characteristics of the aircraft under the flight state. By comparing flight test data and model analysis results, the dynamic response model parameters such as the modal frequency, control surface efficiency and damp are identified and modified to establish a dynamic response analysis model specific for an actual aircraft. The flight test data of control surfaces’ oscillation excitation are consistent with the results of dynamic response model oscillation analysis. The accuracy of the model is improved by identifying and modifying the parameters of the dynamic response model. As a kind of frequency domain excitation, the control surfaces’ oscillation excitation is an effective complement and development of aircraft Ground Vibration Test (GVT), which can be easily applied to an aircraft flight test to identify and modify the dynamic response analysis model. |
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