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Neighboring Optimal Guidance and Attitude Control of Low-Thrust Earth Orbit Transfers

机译：低推力地球轨道转移的邻近的最优指导与姿态控制

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摘要

Recently, low-thrust propulsion is gaining strong interest from the research community and has already found application in some mission scenarios. This paper proposes an integrated guidance and control methodology, termed variable-time-domain neighboring optimal guidance and proportional derivative-rotation matrix (VTD-NOG and PD-RM), and applies it to orbit transfers from a low Earth orbit (LEO) to a geostationary orbit (GEO), using low thrust. The VTD-NOG is a closed-loop guidance approach based on minimization of the second differential of the objective functional along the perturbed path, and it avoids the singularities that occur using alternate neighboring optimal guidance algorithms. VTD-NOG finds the trajectory corrections considering the thrust direction as the control input. A proportional-derivative scheme based on rotation matrices (PD-RM) is used in order to drive the actual thrust direction toward the desired one determined by VTD-NOG. Reaction wheels are tailored to actuate attitude control. In the numerical simulations, thrust magnitude oscillations, displaced initial conditions, and gravitational perturbations are modeled. Extensive Monte Carlo campaigns show that orbit insertion at GEO occurs with excellent accuracy, thus proving that VTD-NOG and PD-RM represents an effective architecture for guidance and control of low-thrust Earth orbit transfers. (c) 2020 American Society of Civil Engineers.
机译：最近，低推力推进是从研究界获得强烈的兴趣，并在一些使命场景中找到了应用。本文提出了集成的引导和控制方法，称为可变时域相邻的最佳指导和比例导数旋转矩阵（VTD-NOG和PD-RM），并将其应用于从低地球轨道（LEO）到的轨道转移使用低推力的地球静止轨道（地理）。 VTD-NOG是基于沿着扰动路径的目标函数的第二差异的最小化的闭环引导方法，并且它避免了使用替代相邻的最优引导算法发生的奇点。 VTD-NOG将轨迹校正发现将推力方向视为控制输入。使用基于旋转矩阵（PD-RM）的比例衍生方案以使实际推力方向驱动到由VTD-NOG确定的所需的推力方向。反应轮定制以启动姿态控制。在数值模拟中，模拟推力幅度振荡，移位初始条件和引力扰动。广泛的蒙特卡罗竞选活动表明，Geo的轨道插入以极好的精度出现，从而证明VTD-Nog和PD-RM表示有效的架构，用于指导和控制低推力地球轨道转移。 （c）2020年美国土木工程师协会。

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  • 来源
    《Journal of aerospace engineering》 |2020年第6期|04020070.1-04020070.14|共14页
  • 作者

    Pontani Mauro; Celani Fabio;

  • 作者单位

    Sapienza Univ Rome Dept Astronaut Elect & Energy Engn Via Salaria 851 I-00138 Rome Italy;

    Sapienza Univ Rome Sch Aerosp Engn Via Salaria 851 I-00138 Rome Italy;

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