Results 11 to 20 of about 2,451,290 (321)

Aerodynamic Heating at Hypersonic Speed

open access: hybrid, 2011
At designing and modernization of a reentry space vehicle it is required accurate and reliable data on the flow field, aerodynamic characteristics, heat transfer processes. Taking into account the wide range of flow conditions, realized at hypersonic flight of the vehicle in the atmosphere, it leads to the need to incorporate in employed theoretical ...
Belyakov Andrey
semanticscholar   +6 more sources

Gas Kinetic Scheme Coupled with High-Speed Modifications for Hypersonic Transition Flow Simulations [PDF]

open access: goldEntropy
The issue of hypersonic boundary layer transition prediction is a critical aerodynamic concern that must be addressed during the aerodynamic design process of high-speed vehicles. In this context, we propose an advanced mesoscopic method that couples the
Chengrui Li   +5 more
doaj   +3 more sources

Interception of a hypersonic vehicle by low-speed interceptors: novel perspectives and cost optimisation [PDF]

open access: goldBulletin of the Polish Academy of Sciences: Technical Sciences, 2022
The conditions for accurately intercepting hypersonic vehicles by low-speed interceptors in the terminal guidance process are examined, considering the general form of a guidance scheme.
Shuangxi Liu   +5 more
doaj   +3 more sources

Intelligent Pursuit–Evasion Game Based on Deep Reinforcement Learning for Hypersonic Vehicles

open access: yesAerospace, 2023
As defense technology develops, it is essential to study the pursuit–evasion (PE) game problem in hypersonic vehicles, especially in the situation where a head-on scenario is created. Under a head-on situation, the hypersonic vehicle’s speed advantage is
Mengjing Gao   +4 more
doaj   +2 more sources

Adaptive Approach Phase Guidance for a Hypersonic Glider via Reinforcement Meta Learning [PDF]

open access: yesarXiv, 2021
We use Reinforcement Meta Learning to optimize an adaptive guidance system suitable for the approach phase of a gliding hypersonic vehicle. Adaptability is achieved by optimizing over a range of off-nominal flight conditions including perturbation of aerodynamic coefficient parameters, actuator failure scenarios, and sensor noise.
B. Gaudet   +3 more
arxiv   +3 more sources

Terminal Adaptive Guidance for Autonomous Hypersonic Strike Weapons via Reinforcement Learning [PDF]

open access: yesJournal of Spacecraft and Rockets, 2021
An adaptive guidance system suitable for the terminal phase trajectory of a hypersonic strike weapon is optimized using reinforcement meta learning. The guidance system maps observations directly to commanded bank angle, angle of attack, and sideslip angle rates.
B. Gaudet, R. Furfaro
arxiv   +2 more sources

Strip blowing from a wedge at hypersonic speeds [PDF]

open access: green29th Aerospace Sciences Meeting, 1991
Peer Reviewed ; http://deepblue.lib.umich.edu/bitstream/2027.42/76964/1/AIAA-1991-32-677 ...
A. F. Messiter, T. C. Adamson
  +9 more sources

A Novel Hypersonic Target Trajectory Estimation Method Based on Long Short-Term Memory and a Multi-Head Attention Mechanism [PDF]

open access: yesEntropy
To address the complex maneuvering characteristics of hypersonic targets in adjacent space, this paper proposes an LSTM trajectory estimation method combined with the attention mechanism and optimizes the model from the information-theoretic perspective.
Yue Xu   +3 more
doaj   +2 more sources

Flare-Control Effectiveness at Hypersonic Speeds

open access: bronzeTRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, 2004
The effects of flare control on the aerodynamic characteristics, performance, and stability of a cylindrical body under laminar and turbulent boundary layer conditions have been studied experimentally and computationally. The experimental study has been carried out in a hypersonic gun tunnel at a Mach number of 8.2 and a Reynolds number of 158,100 ...
Konstantinos Kontis
openalex   +4 more sources

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