考虑状态相关不确定性的轨迹优化,提升估计精度
Estimation-Aware Trajectory Optimization with Set-Valued Measurement Uncertainties
- 用椭球包裹不确定性,构建状态依赖的观测性度量
- 通过最大化观测性度量,生成可提升估计精度的轨迹
- 适用于视觉估计和卫星交会等复杂场景
本文提出一种基于优化的估计感知轨迹生成框架。测量(输出)不确定性为状态相关且集值,采用椭球包络表征未知分布的状态依赖不确定性。引入集值输出映射的正则性概念,使估计感知轨迹生成问题得以形式化。具体而言,对于输出正则映射,可利用关于有限时域状态轨迹呈凹性的集值可观测性度量。通过最大化该度量,可为一大类系统合成估计感知轨迹。本文还研究了局部线性化动力学系统的轨迹规划方法,通过优化可观测性度量实现。通过代表性视觉估计轨迹规划实例验证了所提方法的有效性。此外,论文针对非合作目标交会问题进行了估计感知规划:自主卫星使用机载基于机器学习的估计模块完成交会轨迹设计。
原文摘要 · Abstract (English)
In this paper, an optimization-based framework for generating estimation-aware trajectories is presented. In this setup, measurement (output) uncertainties are state-dependent and set-valued. Enveloping ellipsoids are employed to characterize state-dependent uncertainties with unknown distributions. The concept of regularity for set-valued output maps is then introduced, facilitating the formulation of the estimation-aware trajectory generation problem. Specifically, it is demonstrated that for output-regular maps, one can utilize a set-valued observability measure that is concave with respect to the finite horizon state trajectories. By maximizing this measure, estimation-aware trajectories can then be synthesized for a broad class of systems. Trajectory planning routines are also examined in this work, by which the observability measure is optimized for systems with locally linearized dynamics. To illustrate the effectiveness of the proposed approach, representative examples in the context of trajectory planning with vision-based estimation are presented. Moreover, the paper presents estimation-aware planning for an uncooperative Target-Rendezvous problem, where an Ego-satellite employs an onboard machine learning (ML)-based estimation module to realize the rendezvous trajectory.
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