Abstract: Aiming at the avoidance for hypersonic vehicle in complex no fly zones, in order to solve the problem that the existing trajectory generation methods are strongly dependent on the initial guess, a path trajectory generation method is proposed based on the dual level planning modeling. Among them, the upper level is for path planning, providing path points information for the trajectory to avoid local solutions; the lower level is for trajectory planning, using the path points output by the upper layer to divide the trajectory into several sub segments with small lateral maneuver, and the lateral and longitudinal flight profiles are analytically solved to reduce the simplification error of the motion model. Numerical simulations show that, compared with the existing methods, this method can select the path with better indicators and then improve the global performance. In addition, the guidance error of analytical flight profile is less than 0.03%, which solves the analytical problem of large scale lateral maneuvering.

Key words: Dual level planning, No fly zone avoidance, Hypersonic vehicle, Path planning, Analytical solution