面向 RBCC 模态转换的上升段轨迹优化方法

Aiming at the trajectory optimization issue of the aerospace vehicle ascent stage using the rocket-based combined cycle (RBCC) power system, the mathematical model of the aerospace vehicle ascent stage is established for the various operating modes of RBCC. In order to reduce the difficulty of the constructed trajectory optimization issue, an ascent profile of angle-of-attack and velocity based on the polynomial method is proposed. The original trajectory optimization issue is transformed into a parameter/ trajectory co-optimization problem. Considering the optimization needs of multiple constraints and multiple parameters under RBCC mode conversion, a parameter/trajectory co-optimization method is proposed based on the improved particle swarm algorithm. The search capability and convergence speed of the trajectory optimization algorithm are comprehensively improved. The simulation verification and comparative analysis results in multiple scenarios show that the proposed method can be effectively adapted to the ascent stage trajectory optimization design under the RBCC mode conversion.