对比了卫星交会中强制与非强制轨迹的耗油量，发现非强制不必然更省油。
Comparison of Forced and Unforced Rendezvous, Proximity Operations, and Docking Under Model Mismatch
- 用高保真模型对比了经典CW方程预测轨迹的偏差
- 非强制绕飞在多数情况下并不比强制绕飞省燃料
- 适合关注航天器燃料效率与轨道控制策略的研究者
本文比较了在交会、近距操作与对接（RPOD）任务中，追踪星采用强制与非强制运动所需的燃料消耗。随着航天业发展，提升RPOD模型精度对实现燃料高效、成本可控和延长任务寿命至关重要。本文聚焦于克洛赫西-威尔斯方程（CW方程），通过将其预测轨迹与计算更复杂、保真度更高的高阶RPOD模型进行对比，评估模型失配程度。研究设计了多组相似任务参数，分别对比自然运动绕飞（NMC）与对应强制运动绕飞的燃料需求。维持理想零燃料消耗的CW轨迹所必需的GNC脉冲机动，反映了CW模型失配的实际影响。结果表明，非强制运动并非天然比强制运动更节能，因此不能仅凭其非强制特性就推断可延长轨道作业时间。
原文摘要 · Abstract (English)
This paper compares the required fuel usage for forced and unforced motion of a chaser satellite engaged in Rendezvous, Proximity Operations, and Docking (RPOD) maneuvers. Improved RPOD models are vital, particularly as the space industry expands and demands for improved fuel efficiency, cost effectiveness, and mission life span increase. This paper specifically examines the Clohessy- Wiltshire (CW) Equations and the extent of model mismatch by comparing pre- dicted trajectories from this model with a more computationally complex, higher fidelity RPOD model. This paper assesses several test cases of similar mission parameters, in each case comparing natural motion circumnavigation (NMC) with comparable forced motion circumnavigation. The Guidance, Navigation, and Con- trol (GNC) impulse maneuvers required to maintain the supposedly zero fuel CW trajectories is representative of the extent of CW model mismatch. This paper demonstrates that unforced motions are not inherently more fuel efficient than forced motions, thus permitting extended orbital operations given the higher fuel efficiency.
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