Discrete-Variable-Thrust Guidance for Orbital Rendezvous Based on Feedback Linearization
Discrete-Variable-Thrust Guidance for Orbital Rendezvous Based on Feedback Linearization
复制标题
基于反馈线性化的轨道交会离散变推力制导
DOI：
10.1007/s42496-022-00124-7
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发表时间：
2022
期刊：
影响因子：
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通讯作者：
M. Pontani
中科院分区：
文献类型：
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作者：
I. Napoli;M. Pontani
本文主要研究了在与目标飞行器轨道交会的情况下，跟踪飞行器自主（无人）近距离机动的反馈制导算法的分析、设计和数值测试。放置在近地轨道上的两个飞行器的相对动力学使用非线性Battin-Giorgi相对运动方程进行建模，其中包括所有相关的扰动，即地球势、大气阻力、太阳辐射压力和月球和太阳引起的第三体引力的几个谐波。与之前科学文献中的一些贡献不同，这项研究考虑了轨道对两个飞行器的干扰作用，证明这对成功的机动至关重要。反馈线性化为制导算法的定义和发展提供了理论基础，使跟踪飞行器能够向目标飞行器移动。此外，还考虑了离散变量推力，并提出了一种有效的调制方案，包括控制增益的自适应。蒙特卡罗仿真结果表明，在存在轨道扰动和偏离标称初始条件的不可预测位移的情况下，所提出的制导技术能够有效、准确地将跟踪飞行器驱动向目标飞行器。
This research is focused on the analysis, design, and numerical testing of a feedback guidance algorithm for autonomous (unmanned) close-range maneuvering of a chaser spacecraft, in the context of orbital rendezvous with a target vehicle. The relative dynamics of the two vehicles, placed in nearby low Earth orbits, is modeled using the nonlinear Battin–Giorgi equations of relative motion, with the inclusion of all the relevant perturbations, i.e. several harmonics of the geopotential, atmospheric drag, solar radiation pressure, and third body gravitational pull due to Moon and Sun. Unlike several former contributions in the scientific literature, this research considers the orbit perturbing actions on both vehicles, proving that this is crucial for a successful maneuver. Feedback linearization provides the theoretical foundation for the definition and development of a guidance algorithm that is capable of driving the chaser vehicle toward the target spacecraft. Moreover, discrete-variable thrust is considered, and an effective modulation scheme is proposed that includes adaptation of the control gains. Monte Carlo simulations demonstrate that the guidance technique at hand is effective and accurate in driving the chaser spacecraft toward the target vehicle, in the presence of orbit perturbations and unpredictable displacements from the nominal initial conditions.