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In this paper, it is based on the theory of aerodynamics and one 1∶1 heavy-duty commercial vehicle geometry was built. The numerical simulation of the vehicle was completed by modifying the geometric model, simplifying the mesh and solving the control equations, Using computational fluid dynamics(CFD) commercial software—Ansys Fluent to complete the simulation. The theory of aerodynamic drag was obtained...
Scramjet powered hypersonic vehicles represent the next critical step toward achieving NASA's vision for Highly Reliable Reusable Launch Systems (HRRLS), affordable space access, planetary re-entry systems, and global reach vehicles. The design of such vehicles is a very interdisciplinary and highly complex problem. As such, the development of varying fidelity mathematical models for assessing overall...
Tracking reentry vehicle with strong maneuvers on-line is a challenging task. The key is to develop suitable dynamic models and estimation methods. Two kinds of modeling methods are discussed for reentry tracking, and the unscented filter (UKF) is introduced to the nonlinear tracking system. To reduce the computational load, three simplifications of UKF are developed. Furthermore, the feasibility...
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