arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1402.0579cs.AI
收藏

有界风险下连续动态系统的概率规划

Probabilistic Planning for Continuous Dynamic Systems under Bounded Risk

Keio University(庆应义塾大学);Massachusetts Institute of Technology(麻省理工学院);SpaceX(太空探索技术公司)

Masahiro Ono, Brian C. Williams, L. Blackmore

摘要:

本文提出了一种基于模型的规划者称为概率Sulu规划者或p-Sulu规划者,它控制随机系统在用户指定的风险范围内的目标导向的方式。p-Sulu Planner的目标是允许用户以直观和安全的方式指挥连续的随机系统,例如无人驾驶航空器和航天器。为此,我们首先开发了一个新的计划表示称为机会约束的定性状态计划(CCQSP),通过它,用户可以指定所需的演变的工厂状态以及可接受的风险水平。CCQSP语句的一个示例是在30分钟内从A到B,失败概率小于0.001%。"然后,我们开发了p-Sulu规划器,它可以很好地解决CCQSP规划问题。为了使CCQSP规划,我们在本文中开发了以下两个功能:1)风险敏感的规划与风险界限,和2)目标导向的规划在一个连续的域与时间约束。第一个能力是确保失败的概率是有界的。第二个能力是必不可少的规划,以解决问题的连续状态空间,如车辆路径规划。我们通过模拟两个真实场景来展示p-Sulu Planner的功能:个人飞行器的路径规划和调度以及自主货运飞船的空间交会。

英文摘要:

This paper presents a model-based planner called the Probabilistic Sulu Planner or the p-Sulu Planner, which controls stochastic systems in a goal directed manner within user-specified risk bounds. The objective of the p-Sulu Planner is to allow users to command continuous, stochastic systems, such as unmanned aerial and space vehicles, in a manner that is both intuitive and safe. To this end, we first develop a new plan representation called a chance-constrained qualitative state plan (CCQSP), through which users can specify the desired evolution of the plant state as well as the acceptable level of risk. An example of a CCQSP statement is go to A through B within 30 minutes, with less than 0.001% probability of failure." We then develop the p-Sulu Planner, which can tractably solve a CCQSP planning problem. In order to enable CCQSP planning, we develop the following two capabilities in this paper: 1) risk-sensitive planning with risk bounds, and 2) goal-directed planning in a continuous domain with temporal constraints. The first capability is to ensures that the probability of failure is bounded. The second capability is essential for the planner to solve problems with a continuous state space such as vehicle path planning. We demonstrate the capabilities of the p-Sulu Planner by simulations on two real-world scenarios: the path planning and scheduling of a personal aerial vehicle as well as the space rendezvous of an autonomous cargo spacecraft.

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。

↑