高超声速滑翔飞行器解析协同再入制导

In order to realize the cooperative reentry of multiple hypersonic gliding vehicles, a cooperative reentry guidance method based on the analytical solution of time-to-go and range-to-go estimation is proposed. Based on the quasi-equilibrium gliding condition (QEGC), the analytical expressions for the estimation of time-to-go and range-to-go during the gliding phase are derived. The design of the angle of attack command ensures that the aircraft enters quickly and maintains QEGC, which provides favorable conditions for time coordination. Taking the longitudinal lift-drag ratio as a design variable, numerical algorithms are used for prediction and correction. The bank angle command is obtained by using the azimuth error corridor, and the reentry guidance under the time constraint is realized. Based on the designed cooperative reentry strategy, the cooperative reentry guided flight under the absolute time constraint of multiple aircraft is realized. Simulations are carried out under nominal conditions and under uncertain conditions, respectively. The results show that the method proposed in this study has certain time adjustment ability and robustness to disturbances.