上海科技大学知识管理系统

Aeroassisted orbital transfer has remarkable potential in reducing propellant requirement and prolonging spacecraft lifetime. However, it is heavily influenced by the atmosphere effect uncertainty in engineering. Hence atmosphere effect uncertainty model is established and a robust H2/H∞ guidance algorithm is designed, based on the nominal transfer trajectory and control series derived via Gauss pseudospectral method (GPM) in the paper. Considering the limited calculation ability of on-board computer in engineering, the guidance system is further divided into position and velocity subsystems to reduce computational burden based on the singular perturbation theory. Besides, a real-time simulation system, mainly consisting of Matlab/xPC and on-board computer module, is designed to verify the proposed guidance method. Simulation results show that the method can derive and trace the desired optimal transfer trajectory with satisfying accuracy and sustainable calculation, and strengthen the robustness of atmosphere effect uncertainty remarkably. It has remarkable potential in engineering applications. © 2020, Editorial Office of Control and Decision. All right reserved.