Results 131 to 140 of about 824 (184)

Inverse Simulation for Hypersonic Vehicle Analysis

19th AIAA International Space Planes and Hypersonic Systems and Technologies Conference, 2014
This paper presents the development of an inverse simulation method for hypersonic vehicles and uses the method for design evaluation and trajectory analysis. Inverse simulation is a technique in which the control inputs, required to achieve a desired system output are computed through inversion of the system equations.
Forbes-Spyratos, S., Jahn, I. H., Preller, D., Smart, M.   +3 more
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Boosting trajectory planning for hypersonic vehicle

2016 12th International Conference on Natural Computation, Fuzzy Systems and Knowledge Discovery (ICNC-FSKD), 2016
Boosting trajectory planning is the basis of the gliding trajectory planning for land-launch hypersonic vehicle. Its terminal states are essential to subsequence flight. Besides, mobile launch is an important means to promote the survivability of hypersonic vehicle.
Wenhong Zhou, Liang Pan, Jing Chen, Yu Xie, Fengtao Xiang   +4 more
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Chemistry associated with hypersonic vehicles

19th AIAA, Fluid Dynamics, Plasma Dynamics, and Lasers Conference, 1987
A series of chemical equilibrium, chemical nonequilibrium, and thermal nonequilibrium calculations are performed for various chemical processes related to a Single Stage To Orbit Hydrogen Fueled Airbreathing Hypersonic Vehicle (SSTOHFAHV). The processes include air dissociation downstream of a 60and 30-deg oblique shock and Hi-air combustion.
Thomas R. A. Bussing, Scott Eberhardt
openaire   +1 more source

Detection of scramjet unstart in a hypersonic vehicle model

2012 American Control Conference (ACC), 2012
An observer-based strategy for the detection of engine unstart in a scramjet-powered hypersonic vehicle model is presented in this paper. The occurrence of engine unstart, which is regarded as an actuator fault, causes a transition from an operational vehicle mode in which the engine is controllable to a mode where the vehicle is effectively unpowered.
Silvia Pettinari, Maria Letizia Corradini, Andrea Serrani   +2 more
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ON ASCENT GUIDANCE OF A HYPERSONIC VEHICLE

IFAC Proceedings Volumes, 1992
Abstract A guidance for flight in the vertical plane is designed for a hypersonic aircraft. The objective is to maximize the final vehicle mass on the flight to a specified altitude and speed. The aircraft tracks a reduced model extremal of the remaining flight path. “Reduced” means to regard the flight path angle as a control.
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CFD technology for hypersonic vehicle design

Computers & Structures, 1988
Abstract Because of the recent national interest in hypersonic aircraft, CFD technology with hypersonic application has been and is under intensive development at Boeing. A substantial CFD capability now exists that can be applied to a wide range of hypersonic flows, including those with finite-rate chemistry effects.
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Aeroelastic analysis of hypersonic vehicles

Journal of Fluids and Structures, 2004
Abstract This paper presents a fundamental study of the aeroelastic behavior of hypersonic vehicles. Two separate configurations are examined. First, a typical cross-section analysis of a double-wedge airfoil in hypersonic flow is performed using three different types of unsteady airloads: piston theory and complete Euler and Navier–Stokes solutions ...
P.P. Friedmann, J.J. McNamara, B.J. Thuruthimattam, I. Nydick   +3 more
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Compound control of an uncertain hypersonic vehicle model

International Journal of Control, 2021
The extremely broad flight envelope brings remarkable uncertainties to hypersonic vehicles. This paper investigates the longitudinal control problem of hypersonic vehicles with synthetical consider...
Hao An, Haofeng Wang, Xueqing Zhang, Weinan Xie, Changhong Wang 0004   +4 more
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Design of Supersonic/Hypersonic Vehicles

2021
Studies on supersonic/hypersonic vehicles by the NASA AMI-X program [1], date back to the ‘60s [2]. This program underlined that the approach of integrating individually optimized system elements (as routinely done in designing subsonic aircraft) yields a significant reduction in performance [3].
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Endothermic fuels for hypersonic vehicles

Journal of Aircraft, 1971
The use of hydrocarbon fuels for hypersonic vehicles will require increasing utilization of the fuel as vehicle speed increases. In order to achieve maximum heat sinks endothermic reactions must be employed to augment fuel enthalpy. Various reactions, such as thermal cracking, depolymerization, dehydrogenation, and dehydrocyclization, can be used and ...
H. LANDER, A. C. NIXON
openaire   +1 more source