Se-Hwan AN, Cheol-Goo JUNG, Chang-Hun LEE, Hyoung-Sik CHOI, Yeon-Deuk JEONG
DOI Number: N/A
Conference number: HiSST-2025-091
This paper presents a Cascade Predictor-Corrector Scheme (CPCS) for the Terminal Area Energy Management guidance of a reusable space vehicle. While numerous guidance algorithms have been developed for the TAEM phase, many suffer from high computational loads or decoupled control strategies that limit real-time performance and optimality. The proposed CPCS addresses these limitations by integrating a cascaded correction logic with a robust in-flight trajectory prediction and refinement process. The guidance architecture sequentially adjusts the reference dynamic pressure profile, Heading Alignment Cone radius, and speedbrake deflection based on a sensitivity analysis that establishes a clear hierarchy of control authority. This cascade structure effectively manages vehicle energy and ground track to satisfy terminal constraints under dynamic flight conditions. The performance of the CPCS is evaluated through nominal and Monte Carlo simulations. The results demonstrate that the algorithm achieves a 99.2% success rate and provides significantly higher accuracy in terminal position and energy control compared to the legacy Space Shuttle guidance algorithm, confirming its robustness and effectiveness.