Скачать или смотреть LONG Range Hypersonic Scramjet flight challenges | India's 1st Glide vehicle in 2022?

Aero-servo-elastic analysis of a complex hypersonic aircraft is presented in this paper. A structure geometry was
designed and built based on the 3A vehicle. First, a three-dimensional structural finite element model was proposed
with effective two-dimensional elements, which can obtain effective modal analysis results without useless local modes.
Second, computational fluid dynamic (CFD) simulation was adopted to find aero-heating distribution of thermal mode via
this structure. Aero-heating effect was included to study thermal-modal characteristics of the present structure.
Influence due to material characteristic change and thermal stress was studied. After structural finite element analysis
was completed, flutter of the present vehicle was investigated. Aero-servo-elastic analysis was then started from the
definition of an aero-servo-elastic closed-loop system. In this system, the present aircraft is treated as flexible structure,
in which the control sensor on the aircraft received not only rigid motion signal but also elastic vibration signal, and this
signal can translate into the deflection signal to form aerodynamic control force through this aero-servo control system,
and this force can continually influence aerodynamic force. One of the most important steps for this analysis was
computation of unsteady aerodynamic force of the present structure, and the related process was developed based
on an effective fitting method. Finally, bode diagrams of pitching, rolling and yawing were investigated, form which the law
of aero-servo stability of the 3A vehicle can be observed and analyzed. It can be found from the results of this paper
that effective investigation of aero-servo-elastic characteristics of a complex hypersonic aircraft should be based on
accurate structural finite element modeling, modal analysis and flutter analysis. The proposed method in this paper can
provide effective analysis process for the design of controller for hypersonic aircraft.
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References: https://www.sciencedirect.com/science...
https://journals.sagepub.com/doi/pdf/...
https://www.ncbi.nlm.nih.gov/books/NB...
https://www.researchgate.net/figure/B...
https://slideplayer.com/slide/4217801/

BGM: Akash Gandhi (Eye of Glory)

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