Reduced-order modeling and analysis for high-fidelity aero-thermo-servo-elasticity (ATSE) simulation for hypersonic vehicles

This research work is on the development of new algorithms to study the nonlinear coupled dynamics between structural dynamics, heat transfer, and hypersonic aerothermodynamics. Several subspace realization techniques as well as embeddings and sparse representation methods are used to provide a linear-time varying model or a sparse model to reproduce the aerothermoelastic response of a hypersonic vehicle and to study the effect of a bifurcation parameter. To validate the developed approach, numerical simulations involving a benchmark model depicting the complex ATE nonlinear dynamics for the flutter of a heated panel model as well as high-fidelity simulations are considered. The numerical experiments performed demonstrate the accuracy of the presented approach in capturing the bifurcation behavior in limit cycle oscillations due to variations in dynamic pressure. This eventually enables accurate hypersonic aerothermoelastic analysis and control with tractable computational cost.

Work in collaboration with Daning Huang and Puneet Singla.