Abstract: A static cooperative reentry guidance method is proposed for multi-hypersonic vehicle. Firstly, the relationship between trajectory length and flight time is studied. The idea that common trajectory length can be used as a coordination variable is proposed. Then a two-layer cooperative framework is presented, in which the upper layer is used as the coordination layer, and the lower layer is used as the execution layer to complete the reentry flight. Finally, according to the special requirement of time consistency, a strategy of extracting time-domain information is proposed, which transforms the problem of terminal time consistency into the final state convergence problem. The reference trajectory is designed in the energy domain, and is tracked in the time domain by extracting the information from the energy domain. The proposed method is simulated in nominal state and disturbance environment respectively. The results show that the proposed method can concisely realize the reentry cooperative guidance of multiple aircraft, and has good application potential.

Key words: Cooperative reentry, Static cooperative, Trajectory length, Double-layer cooperative framework, Dynamic heading calibration