Cooperative Time-Guidance Strategy for Multihypersonic Vehicles With Irregular No-Fly Zones: A Transformer-Based Real-Time Planning Method

The cooperative time-guidance strategy of multihypersonic vehicles with irregular no-fly zone is studied in this article. A real-time transformer is designed to improve the calculation speed and solve the online planning problem of multihypersonic vehicles. First, the irregular no-fly zone is decomposed into a combination of acute triangle based on the visual point theory and the heading angle corridor is designed. Second, in the lateral profile, the lateral predictive guidance is used to roughly adjust the time influence factor. In the longitudinal profile, the Newton iteration method is applied to design and adjust the linear bank angle profile with three variables to satisfy the cooperative time constraint and typical constraints including overload constraint, heating rate constraint, and dynamic pressure constraint. Third, a real-time transformer-based framework is constructed to realize the online guidance and irregular no-fly zone avoidance of hypersonic vehicles, which can shorten trajectory planning time compared with the traditional predictor–corrector guidance. Finally, the validity of the cooperative time-guidance strategy is tested and verified by simulation results.