arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2110.09007cs.ROcs.FLmath.OC
收藏

未知动态环境下软度量区间时序逻辑在线运动规划

Online Motion Planning with Soft Metric Interval Temporal Logic in Unknown Dynamic Environment

University of Science and Technology of China(中国科学技术大学);Lehigh University(利哈伊大学);University of Iowa(爱荷华大学)

Zhiliang Li, Mingyu Cai, Shaoping Xiao, Zhen Kan

摘要:

高规格自主系统的运动规划具有广泛的应用。然而,涉及时间时序逻辑的形式语言的研究仍处于探索阶段。此外,许多现有的结果依赖于一个关键的假设,用户指定的任务是可行的,在给定的环境。当操作环境是动态的和未知的时,挑战出现,因为环境可以被发现是禁止的,导致潜在的冲突任务,其中预先指定的定时任务不能完全满足。在考虑到有时限的要求时,这些问题变得更具挑战性。为了解决这些挑战,这项工作提出了一个控制框架,认为硬约束,以执行安全要求和软约束,使任务放松。度量区间时序逻辑(MITL)规格处理时间约束。通过构造一个松弛时间乘积自动机,将在线运动规划策略与滚动时域控制器合成生成策略,按优先级降序实现多个目标:1)形式上保证满足硬安全约束; 2)主要完成软时间任务; 3)尽可能收集时变奖励。放松结构的另一个新颖之处是考虑对不可行情况的时间和任务的违反。仿真结果验证了所提出的方法。

英文摘要:

Motion planning of an autonomous system with high-level specifications has wide applications. However, research of formal languages involving timed temporal logic is still under investigation. Furthermore, many existing results rely on a key assumption that user-specified tasks are feasible in the given environment. Challenges arise when the operating environment is dynamic and unknown since the environment can be found prohibitive, leading to potentially conflicting tasks where pre-specified timed missions cannot be fully satisfied. Such issues become even more challenging when considering time-bound requirements. To address these challenges, this work proposes a control framework that considers hard constraints to enforce safety requirements and soft constraints to enable task relaxation. The metric interval temporal logic (MITL) specifications are employed to deal with time-bound constraints. By constructing a relaxed timed product automaton, an online motion planning strategy is synthesized with a receding horizon controller to generate policies, achieving multiple objectives in decreasing order of priority 1) formally guarantee the satisfaction of hard safety constraints; 2) mostly fulfill soft timed tasks; and 3) collect time-varying rewards as much as possible. Another novelty of the relaxed structure is to consider violations of both time and tasks for infeasible cases. Simulation results are provided to validate the proposed approach.

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。

↑