Results 51 to 60 of about 81,958 (286)
Impact-Time-Control Guidance Law for Hypersonic Missiles in Terminal Phase
IEEE Access, 2020 Recent researches on hypersonic vehicles adopted in military have gained a lot of interest because of its high flight speed and efficiency. However the guidance laws for hypersonic missiles against the anti-missile system to increase survivability and ...
Chenhao Zhu +4 more
doaj +1 more source
Hydrocarbon Fuel Flow and Heat Transfer Investigation in Rotating Channels
Energies, 2023 Ram air turbines are used in the power generation systems of hypersonic vehicles, which can address the problem of the high power consumption of weapon systems.
Mengqiang Dong, Hongyan Huang
doaj +1 more source
Fractional-Order Sliding Mode Guidance Law for Intercepting Hypersonic Vehicles
Aerospace, 2022 This paper addresses the problem of a low-speed missile intercepting a hypersonic vehicle in the longitudinal plane. Firstly, based on the concept of the zero of the angular rate of the line-of-sight (LOS) angle, the guidance system is established by ...
Shuangxi Liu +4 more
doaj +1 more source
Aluminum Scandium Nitride as a Functional Material at 1000 °C
Advanced Electronic Materials, EarlyView.Aluminum scandium nitride (AlScN) exhibits remarkable ferroelectric, piezoelectric, and dielectric stability at extreme temperatures. This study demonstrates the robust performance of TaSi2/AlScN/TaSi2 capacitors up to 1000 °C, revealing a substantial increase in piezoelectricity and a marked reduction in coercive field.
Venkateswarlu Gaddam +12 more
wiley +1 more source
Adaptive Approach Phase Guidance for a Hypersonic Glider via Reinforcement Meta Learning [PDF]
arXiv, 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.
arxiv
Application of AA-PSP to hypersonic flows: the double ramp model [PDF]
, 2012 Anodized Aluminium Pressure Sensitive Paint (AA-PSP) is known for its rapid response characteristics, making it a highly desirable technique when studying high-speed phenomenon on a global scale.
Basu +24 more
core +1 more source
Materials Design for Hypersonics [PDF]
arXiv, 2023 Hypersonic vehicles must withstand extreme conditions during flights that exceed five times the speed of sound. These systems have the potential to facilitate rapid access to space, bolster defense capabilities, and create a new paradigm for transcontinental earth-to-earth travel.
arxiv
Nanosecond Hyperquenching for Electron Cryo‐Microscopy Without Air‐Water Interface Artifacts
Chemistry – A European Journal, EarlyView.A novel method for the ultrafast vitrification of the biological assemblies is assayed by the electron cryotomography. Protein specimens prepared by this method inherently lack the spatial/structural artifacts, which derive from the surface tension at the air‐water interface (AWI).
Utz H. Ermel +2 more
wiley +1 more source
Aerospace, 2023 In this paper, aimed at the problem of large temperature gradient thermal testing with the typical sharp wedge leading edge structure of a hypersonic vehicle, a subsonic high-temperature combustion gas heating (SHCH) test device is used to conduct a ...
Ri Wang +5 more
doaj +1 more source
Hypersonic Jets of Detonation Products in the Hydrodynamic Collapse of Macroscopic Voids
Propellants, Explosives, Pyrotechnics, EarlyView.Using machined mm‐scale voids at the surface of PBX 9501 samples, detonation‐driven jets of product gases form. We find that there is an optimal distance from the charge surface at which the energy transfer due to this jetting is maximized using witness plate impact experiments and hydrocode simulations.
Jason J. Wilkening +3 more
wiley +1 more source