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- Title
The Development of a Flight Test Platform to Study the Body Freedom Flutter of BWB Flying Wings.
- Authors
Shi, Pengtao; Liu, Feng; Gu, Yingsong; Yang, Zhichun
- Abstract
A flight test platform is designed to conduct an experimental study on the body freedom flutter of a BWB flying wing, and a flight test is performed by using the proposed platform. A finite element model of structural dynamics is built, and unsteady aerodynamics and aeroelastic characteristics of the flying wing are analyzed by the doublet lattice method and g-method, respectively. Based on the foregoing analyses, a low-cost and low-risk flying-wing test platform is designed and manufactured. Then, the ground vibration test is implemented, and according to its results, the structural dynamics model is updated. The flight test campaign shows that the body freedom flutter occurs at low flight speed, which is consistent with the updated analytical result. Finally, an active flutter suppression controller is designed using a genetic algorithm for the developed flying wing for future tests, considering the gains and sensor location as design parameters. The open- and closed-loop analyses in time- and frequency-domain analyses demonstrate that the designed controller can improve the instability boundary of the closed-loop system effectively.
- Subjects
FLIGHT testing; FLUTTER (Aerodynamics); UNSTEADY flow (Aerodynamics); VIBRATION tests; SOIL vibration; FREQUENCY-domain analysis; INTERFERENCE suppression; OPTICAL lattices
- Publication
Aerospace (MDPI Publishing), 2021, Vol 8, Issue 12, p390
- ISSN
2226-4310
- Publication type
Article
- DOI
10.3390/aerospace8120390