The invention discloses an energy substitution-based efficient generation method for an optimal trajectory of aerodynamic-assisted orbit drop burn-up, which belongs to the field of aerospace and comprises the following steps of: establishing a spacecraft aerodynamic-assisted orbit drop flight dynamics model, extracting a motion equation in a longitudinal plane, converting an independent variable into a variable in an energy form, and generating the optimal trajectory of the aerodynamic-assisted orbit drop burn-up. Obtaining a height and energy decoupling differential equation, and parameterizing the change of the aerodynamic acceleration; designing a segmented parameterization expression of the track angle with respect to energy, and realizing high-precision fitting of the optimal track angle change; based on the fitting function, deriving an expression of terminal energy in different situations, and further predicting the trajectory speed; and corresponding speeds are calculated at different height points, a burnup optimal reference trajectory is efficiently generated, and it is guaranteed that the spacecraft is transferred to a target orbit with low burnup. According to the energy substitution-based efficient generation method for the optimal burnup trajectory of pneumatic auxiliary rail descending, provided by the invention, efficient generation of the subsequent optimal burnup trajectory can be realized no matter in a height descending section or a height ascending section.
本发明公开了一种基于能量代换的气动辅助降轨燃耗最优轨迹高效生成方法,属于航空航天领域,包括建立航天器气动辅助降轨飞行动力学模型,提取出纵向平面内运动方程,将自变量转换为能量形式的变量,得到高度与能量解耦的微分方程,参数化气动加速度的变化;设计航迹角关于能量的分段参数化表达式,实现最优航迹角变化的高精度拟合;基于拟合函数,分情况推导终端能量的表达式,进而预测轨迹速度;在不同高度点计算对应的速度大小,高效生成燃耗最优参考轨迹,保障航天器以低燃耗转移至目标轨道。本发明提供的一种基于能量代换的气动辅助降轨燃耗最优轨迹高效生成方法,无论在高度下降段还是上升段都能实现对后续燃耗最优轨迹的高效生成。
Energy substitution-based efficient generation method for optimal trajectory of pneumatic-assisted rail-descending fuel consumption
基于能量代换的气动辅助降轨燃耗最优轨迹高效生成方法
27.12.2024
Patent
Elektronische Ressource
Chinesisch
IPC: | B64G Raumfahrt , COSMONAUTICS |
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