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arXiv 2302.13115cs.AI
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机会约束随机最短路径对偶公式及其在自主车辆行为规划中的应用

Dual Formulation for Chance Constrained Stochastic Shortest Path with Application to Autonomous Vehicle Behavior Planning

Khalifa University(哈利法大学)

Rashid Alyassi, Majid Khonji

摘要:

自动驾驶车辆面临的问题是优化后续机动的预期性能,同时限制与周围动态障碍物碰撞的风险。这些障碍物,如代理车辆,往往表现出随机过渡,应及时和安全的方式。约束随机最短路径问题(C-SSP)是在随机环境中,在某些类型的操作约束下规划的一种形式。虽然C-SSP允许在规划问题中指定约束,但它不允许限制约束违反的概率,这在安全关键应用中是期望的。这项工作的第一个贡献是一个确切的整数线性规划制定的机会约束SSP(CC-SSP),达到确定性的政策。其次,随机舍入过程中提出的随机政策。第三,我们证明了CC-SSP形式主义可以推广到跨越多个时间步长的约束。评估结果表明,我们的方法在基准问题相比,现有的方法是有用的。

英文摘要:

Autonomous vehicles face the problem of optimizing the expected performance of subsequent maneuvers while bounding the risk of collision with surrounding dynamic obstacles. These obstacles, such as agent vehicles, often exhibit stochastic transitions that should be accounted for in a timely and safe manner. The Constrained Stochastic Shortest Path problem (C-SSP) is a formalism for planning in stochastic environments under certain types of operating constraints. While C-SSP allows specifying constraints in the planning problem, it does not allow for bounding the probability of constraint violation, which is desired in safety-critical applications. This work's first contribution is an exact integer linear programming formulation for Chance-constrained SSP (CC-SSP) that attains deterministic policies. Second, a randomized rounding procedure is presented for stochastic policies. Third, we show that the CC-SSP formalism can be generalized to account for constraints that span through multiple time steps. Evaluation results show the usefulness of our approach in benchmark problems compared to existing approaches.

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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