通过随机重启提升运动规划算法速度,显著缩短计算时间。
Faster Motion Planning via Restarts
- 引入新型随机重启策略加速拉斯维加斯类运动规划算法
- 实测平均提速3倍以上,路径更短且多线程收益更大
- 开源实现易部署,适合机器人路径规划研究者使用
随机化方法如PRM和RRT在运动规划中广泛应用,但在某些情况下运行时间存在固有不稳定性,导致简单实例也出现“灾难性”性能表现。本文应用多种随机重启技术(部分为新提出)来加速拉斯维加斯算法,在实践中取得显著提速效果(多数情况提升3倍或更多)。实验表明,新算法不仅运行时间更短、生成路径更优,且相比直接并行实现,多线程加速效果更明显。我们证明了新变体的最优性。代码已开源,托管于GitHub,易于部署与使用。
原文摘要 · Abstract (English)
Randomized methods such as PRM and RRT are widely used in motion planning. However, in some cases, their running-time suffers from inherent instability, leading to ``catastrophic'' performance even for relatively simple instances. We apply stochastic restart techniques, some of them new, for speeding up Las Vegas algorithms, that provide dramatic speedups in practice (a factor of $3$ [or larger] in many cases). Our experiments demonstrate that the new algorithms have faster runtimes, shorter paths, and greater gains from multi-threading (when compared with straightforward parallel implementation). We prove the optimality of the new variants. Our implementation is open source, available on github, and is easy to deploy and use.
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