Prescribed-Time Cooperative Integrated Guidance and Control for Reentry Vehicle Based on Hybrid Control Strategy

In this paper, a prescribed-time cooperative integrated guidance and control (PTCIGC) is designed for reentry vehicles to achieve cooperative guidance and control. This method is designed based on bank-to-turn and skid-to-turn (BTT-STT) hybrid control strategy. Firstly, an IGC model of the reentry vehicle is established, which can be divided into three subsystems: Relative motion subsystem, airflow angle subsystem, and three-channel angle rate subsystem. Secondly, a prescribed-time controller is designed for the relative motion subsystem to obtain the airflow angle commands. Thirdly, a prescribed-time sliding mode controller (SMC) is designed for the airflow angle subsystem to track the airflow angle commands. Fourthly, to track the three-channel angle rate commands, a prescribed-time disturbance observer (DO) based on prescribed-time SMC is designed. Finally, the effectiveness of the PTCIGC method proposed in this paper is verified by six-degree-of-freedom (6DoF) numerical simulation in three-dimensional (3D) space.