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arXiv 2404.13698cs.ROcs.LGstat.ML
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高维中的免重采样粒子滤波器

Resampling-free Particle Filters in High-dimensions

MIT(麻省理工学院);Harvard(哈佛大学)

Akhilan Boopathy, Aneesh Muppidi, Peggy Yang, Abhiram Iyer, William Yue, Ila Fiete

AI总结:

针对高维状态空间中粒子滤波器的“粒子匮乏”问题,提出一种免重采样粒子滤波器,通过放弃传统重采样步骤确保粒子集多样性,理论证明其能近似准确表示后验分布,并在高维合成任务和6D姿态估计中验证了有效性。

摘要:

状态估计对于众多机器人应用的性能和安全性至关重要。在一系列估计技术中,粒子滤波器因其非参数特性被视为一种强大的解决方案。然而,在高维状态空间中,这些滤波器面临诸如“粒子匮乏”等挑战,这阻碍了对真实后验分布的准确表示。本文提出了一种新颖的免重采样粒子滤波器,旨在通过放弃传统的重采样步骤来缓解粒子匮乏问题。这确保了更广泛和更多样化的粒子集,这在高维场景中尤为关键。在理论上,我们提出的滤波器被证明能够在高维环境中提供对所需后验分布的近乎准确的表示。在实验上,我们方法的有效性通过一个高维合成状态估计任务以及一个源自视频的6D姿态估计得到了验证。我们主张,随着机器人系统以更大的自由度演进,为高维状态空间量身定制的粒子滤波器将是不可或缺的。

英文摘要:

State estimation is crucial for the performance and safety of numerous robotic applications. Among the suite of estimation techniques, particle filters have been identified as a powerful solution due to their non-parametric nature. Yet, in high-dimensional state spaces, these filters face challenges such as 'particle deprivation' which hinders accurate representation of the true posterior distribution. This paper introduces a novel resampling-free particle filter designed to mitigate particle deprivation by forgoing the traditional resampling step. This ensures a broader and more diverse particle set, especially vital in high-dimensional scenarios. Theoretically, our proposed filter is shown to offer a near-accurate representation of the desired posterior distribution in high-dimensional contexts. Empirically, the effectiveness of our approach is underscored through a high-dimensional synthetic state estimation task and a 6D pose estimation derived from videos. We posit that as robotic systems evolve with greater degrees of freedom, particle filters tailored for high-dimensional state spaces will be indispensable.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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