one of the most common methods for controlling and increasing maneuverability of projectiles, especially the ones which move at high altitude and in low density air, is using lateral or reaction jets. the resultant force of the reaction jet is related to the jet and flow parameters. for finding their relation experimental, numerical, and analytical methods have been used. in order to change the...

This paper presents a sequential loop closure approach to designing a velocity and altitude tracking autopilot for a hypersonic vehicle. The control architecture consists of two decoupled control subsystems, one for velocity, the other for altitude. The velocity control subsystem consists of an adaptive augmented baseline controller. The altitude control subsystem consists of an adaptive inner-...

China held the first of what could be a series of tests to check on the speed of its new experimental hypersonic glide vehicle (HGV) which would approach its target at a velocity of up to 10 times the speed of sound. Basically dubbed as WU-14 by Pentagon, this development interpreted to be designed for mounting on intercontinental ballistic missiles, as when the hypersonic vehicle is detached f...

A parallel computational fluid dynamics code has been developed for the study of aerodynamic heating problem in hypersonic flows. The code employs the 3D Navier-Stokes equations as the basic governing equations to simulate the laminar hypersonic flow. The cell centered finite volume method based on structured grid is applied for spatial discretization. The AUSMPW+ scheme is used for the invisci...

Hypersonic is a Cloud-based tool that proposes a new approach to the deployment of model analysis facilities. It is implemented as a RESTful Web service API offering analysis features such as model clone detection. This approach allows the migration of resource intensive analysis algorithms from monolithic desktop modeling tools to a wide range of mobile and Web-based clients. As a technology d...

A new Cartesian implementation of the direct simulation Monte Carlo (DSMC) method, named the hypersonic aerothermodynamics particle (HAP) code, is presented. This code is intended for rapid setup and simulation of rarefied flow problems, and as a framework for evaluating new physical models and numerical techniques. Unique features include the use of nonuniform Cartesian adaptive subcells, a co...

Several unique aspects of the design of hypersonic aerospace systems necessitate a truly multidisciplinary approach from the outset of the program. These coupled with a vague or changing requirements environment, provide an impetus for the development of a systematic and unified approach for the exploration and evaluation of alternative hypersonic vehicle concepts. The method formulated and out...

This paper uses robust pole assignment method to design an adaptive velocity and altitude tracking control algorithm for the longitudinal model of a wave rider configuration air-breathing hypersonic vehicle, which has strong coupling between structure, propulsion and aerodynamics. Base on the elastic hypersonic vehicle model CSUAL_GHV, the simulations using adaptive robust pole assignment contr...

A method of underexpanded hypersonic viscous jets has been developed to acquire experimental aerodynamic data for wedges and plates in the transitional regime between free-molecular and continuum regimes. The kinetic, viscous, and rotational nonequilibrium quantum processes in the jets of He, Ar, N2, and CO2 under various experimental conditions have been analyzed by asymptotic methods and nume...

A method of underexpanded hypersonic viscous jets has been developed to acquire experimental aerodynamic data for simple-shape bodies (plates, wedges, disks, and others) in the transitional regime between free-molecular and continuum flow regimes. The kinetic, viscous, and nonequilibrium processes in the jets of He, Ar, N2, and CO2 under various experimental conditions have been analyzed by asy...