Abstract This paper presents a differential atmospheric drag-based control algorithm for rendezvous with a non-cooperative target in Low Earth Orbit. The challenge of using a differential input that requires knowledge of physical parameters of the involved spacecraft, is addressed by designing a Lyapunov-based adaptive controller that compensates for the uncertain ballistic coefficient of the target spacecraft as well as the time-varying atmospheric density and velocity of the spacecraft relative to the atmosphere. Numerical simulations using the Schweighart-Sedwick relative dynamics are presented to validate the controller design. Additionally, simulations with more accurate dynamics for each spacecraft along with the NRLMSISE-00 model of atmospheric density are presented to evaluate the performance of the controller under nonlinearities and input saturation.

中文翻译：

---

基于差分阻力的未知目标交会机动自适应控制

摘要 本文提出了一种基于差分大气阻力的低地球轨道非合作目标交会控制算法。使用需要有关航天器物理参数知识的差分输入的挑战通过设计基于李雅普诺夫的自适应控制器来解决，该控制器补偿目标航天器的不确定弹道系数以及随时间变化的大气密度和速度相对于大气层的航天器。提供了使用 Schweighart-Sedwick 相对动力学的数值模拟来验证控制器设计。此外，