论文标题
具有时间约束的亚最佳模型预测控制的自主卫星集合和接近性操作
Autonomous Satellite Rendezvous and Proximity Operations with Time-Constrained Sub-Optimal Model Predictive Control
论文作者
论文摘要
本文为6个自主会合度（6DOF）自主会合和对接问题提出了一个时间约束的模型预测控制策略，可控制的“代理”航天器与不可控制的“首席”飞船之间。由于车载处理速度有限，该控制策略对计算时间限制进行了解释。翻译动力学模型源自Clohessy-Wiltshire方程，角动力学是在围绕副代理质量中心的气射流动力上建模的。仿真结果显示，通过限制计算每个输入时允许算法迭代的数量，可以在计算时间限制下实现对接配置。具体而言，我们表明，可以从模型预测控制实现中消除90％以上的计算，而不会显着损害控制性能。
This paper presents a time-constrained model predictive control strategy for the 6 degree-of-freedom (6DOF) autonomous rendezvous and docking problem between a controllable "deputy" spacecraft and an uncontrollable "chief" spacecraft. The control strategy accounts for computational time constraints due to limited onboard processing speed. The translational dynamics model is derived from the Clohessy-Wiltshire equations and the angular dynamics are modeled on gas jet actuation about the deputy's center of mass. Simulation results are shown to achieve the docking configuration under computational time constraints by limiting the number of allowed algorithm iterations when computing each input. Specifically, we show that upwards of 90% of computations can be eliminated from a model predictive control implementation without significantly harming control performance.
