Deep-stall envelope computing considering unsteady aerodynamic based on reachability analysis

The problem of unsteady aerodynamic is a significant research topic in the post-stall maneuver of the new generation jet fighter. The modeling development of the unsteady aerodynamic is important to the further study on the deep stall and spin. However, the conventional method can hardly handle the unsteady aerodynamic with immeasurable and time-varying characteristic. In this paper, a deep-stall envelope computing method is developed based on reachability analysis technique by considering unsteady aerodynamic. The studied method has been verified via the calculating results.