Investigation of direct force control for aerocapture at Neptune

Deshmukh Rohan G.; Spencer David A.; Dutta Soumyo

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Investigation of direct force control for aerocapture at Neptune

机译：海王星航空腐蚀直接势力调查

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In this work, a direct force control numerical predictor-corrector guidance architecture is developed to enable Neptune aerocapture using blunt body aeroshells. A linear aerodynamics model is formulated for a Mars Science Laboratory-derived aeroshell. The application of optimal control theory shows that the Delta V-minimizing angle of attack and side-slip angle control laws are bang-bang. A closed-loop numerical predictor-corrector direct force control guidance algorithm is developed and numerically simulated using the Program to Optimize Simulated Trajectories II. A series of Monte Carlo simulations are conducted to assess the guidance robustness to uncertainties in vehicle aerodynamics, atmospheric density, and entry state. For the reference set of uncertainties, the direct force control vehicle achieves 99.7% successful science orbit insertion within a 330 m/s total Delta V budget for periapsis raise, apoapsis, inclination, and ascending node corrections. Improved atmospheric knowledge and delivery state accuracy are shown to improve the success to 100% and reduce the Delta V to 230 m/s. Direct force control is demonstrated to be an enabling technology for blunt body aerocapture at Neptune while providing comparable performance to existing slender body vehicles studied in literature.

机译：在这项工作中，开发了一种直接的力控制数值预测校正器引导架构，以使用Blunt Body Aeroshss启用海王星Aercocapture。为火星科学实验室衍生的宇航员制定了线性空气动力学模型。最优控制理论的应用表明，达到达到的攻击角和侧滑角控制法是Bang-Bang。使用该程序开发和数值模拟闭环数值预测器校正器直接力控制引导算法，以优化模拟轨迹II。进行了一系列蒙特卡罗模拟，以评估车辆空气动力学，大气密度和进入状态下的不确定性的引导稳健性。对于参考的不确定因素，直接力控制车辆在330米/秒的总ΔV预算中实现99.7％的成功科学轨道插入，用于Periapsis提高，apopsis，倾斜度和升序节点校正。提高了大气知识和交付状态准确度，显示了提高了100％的成功，并减少了Delta V至230米/秒。将直接力控制证明是海王星在海王星的钝器空气腐蚀的能力控制，同时为在文献中研究的现有纤细的身体车辆提供了可比的性能。

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来源
《Acta astronautica》 |2020年第10期|375-386|共12页
作者
Deshmukh Rohan G.; Spencer David A.; Dutta Soumyo;
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作者单位

Purdue Univ 480 W Stadium Ave W Lafayette IN 47907 USA;

Purdue Univ 480 W Stadium Ave W Lafayette IN 47907 USA;

NASA Langley Res Ctr 1 NASA Dr Hampton VA 23681 USA;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类
关键词
Aerocapture; Neptune; GN C;

机译：适量;海王星;GN＆C;

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Investigation of direct force control for aerocapture at Neptune

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