arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1909.06363cs.DScs.RO
收藏

通过$ε$网络的概率路线图的复杂性示例

Sample Complexity of Probabilistic Roadmaps via $ε$-nets

Stanford University(斯坦福大学)

Matthew Tsao, Kiril Solovey, Marco Pavone

摘要:

我们研究的概率路线图(PRM)在有限时间(非渐近)制度的基本理论方面。特别是,我们调查的方法的完整性和最优性保证的影响,基本的确定性抽样分布${\mathcal{X}}$和连接半径${r>0}$。我们开发的概念${(δ,ε)}$ -完整性的参数${\mathcal{X}, r}$,这表明,对于每个运动规划问题的间隙至少${δ>0}$,PRM使用${\mathcal{X}, r}$返回一个解决方案不长于${1+ε}$倍的最短$δ$ -清除path. Leveling的概念$ε$ -网,我们的特点是在下限和上限方面的样本数量需要保证${(δ,ε)}$ -完整性。这与以前的工作主要考虑的渐近制度,其中样本的数量趋于无穷大。在实践中,我们提出了一个采样分布的启发$ε$ -网,实现几乎相同的覆盖率,而使用的样本少得多的网格。

英文摘要:

We study fundamental theoretical aspects of probabilistic roadmaps (PRM) in the finite time (non-asymptotic) regime. In particular, we investigate how completeness and optimality guarantees of the approach are influenced by the underlying deterministic sampling distribution ${\mathcal{X}}$ and connection radius ${r>0}$. We develop the notion of ${(δ,ε)}$-completeness of the parameters ${\mathcal{X}, r}$, which indicates that for every motion-planning problem of clearance at least ${δ>0}$, PRM using ${\mathcal{X}, r}$ returns a solution no longer than ${1+ε}$ times the shortest $δ$-clear path. Leveraging the concept of $ε$-nets, we characterize in terms of lower and upper bounds the number of samples needed to guarantee ${(δ,ε)}$-completeness. This is in contrast with previous work which mostly considered the asymptotic regime in which the number of samples tends to infinity. In practice, we propose a sampling distribution inspired by $ε$-nets that achieves nearly the same coverage as grids while using significantly fewer samples.

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。

↑