Abstract
The wide use of lifting body and wave-rider aerodynamic layout causes difficulty in the coupling between the rigid modal of a flexible air-breathing hypersonic vehicle and its elastic modal. Hence we use the finite element method and the variable cross-section free beam to establish the control-oriented structural elastic model of the hypersonic vehicle. We apply the first-order local flow piston theory to calculate its unsteady aerodynamic force. Then we use the uniform design method and the step-by-step regression analysis method to establish its high-precision curve fitting model (CFM). The simulation results, given in Figs.3 and 4, and their comparison show preliminarily that: the CFM established with the control-oriented elastic modeling method agrees well with the physical model of the hypersonic vehicle, while consuming less computing time and resources than other traditional modeling methods.
| Original language | English |
|---|---|
| Pages (from-to) | 557-562 |
| Number of pages | 6 |
| Journal | Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University |
| Volume | 32 |
| Issue number | 4 |
| State | Published - 1 Aug 2014 |
Keywords
- Aerodynamics
- Computational efficiency
- Control
- Curve fitting
- Flow fields
- Hypersonic vehicles
- Lift
- Mathematical models
- Regression analysis
- Unsteady flow