Uniformed Aeroelastic ROM Realization Across Flight Parameter Space for Dynamic Flight Simulation

The technical objective of the Phase II project is to develop the production-ready Dynamic Flight Simulation (DFS) system using the F-15 Saudi as a testbed and validate it with the F-15 Saudi flight test data. The key element in the DFS system is the Reduced-Order-Model (ROM)-based aeroelastic solver with an embedded aerodynamic forces database that is generated by a steady Navier-Stokes solver and ZONA Unstructured Linearized Unsteady Solver (ZULUS), respectively. The aerodynamic forces database contains a set of aerodynamic ROMs represented by the rational function approximation matrices that are uniformly accurate within the wide range of flight parameter space in terms of angle of attack, side slip angle and Mach number. Because of the ROM-based aerodynamic database, the DFS system can achieve the real-time simulation capability and perform continuous flight dynamic simulations across the flight parameter space. The DFS system provides a virtual flight test capability that can be used for many purposes including control law testing, trajectory simulation, flight quality assessment, flight loads generation, and prediction of aeroelastic and aeroservoelastic stability boundaries as well as physical understanding of observed in-flight dynamic behavior. Once the DFS system is developed, it will be production ready for commercialization.