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arXiv 2409.01458cs.ROcs.SYeess.SY
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时变软最大障碍函数在未知与动态环境中的安全性保障

Time-Varying Soft-Maximum Barrier Functions for Safety in Unmapped and Dynamic Environments

Department of Mechanical and Aerospace Engineering, University of Kentucky(机械与航空航天工程系,肯塔基大学)

Amirsaeid Safari, Jesse B. Hoagg

AI总结:

针对未知动态环境,提出闭式最优反馈控制,用时变软最大函数组合局部CBF,确保安全导航,并在两类机器人上验证。

摘要:

我们提出了一种闭式最优反馈控制方法,该方法能确保在事先未知且可能动态变化的环境中的安全性。本文考虑这样一种场景:周期性地获取局部感知数据(例如激光雷达数据),这些数据可用于构建一个局部控制障碍函数(CBF),该函数建模了一个在未来一段时间内安全的局部集合。然后,我们使用一个平滑的时变软最大函数,将最近获得的N个局部CBF组合成一个单一的障碍函数,该函数建模了最近获得的N个局部集合的近似并集。这个复合障碍函数被用于一个受约束的二次优化问题,该问题以闭式求解,以获得安全且最优的反馈控制。我们还将时变软最大障碍函数控制应用于两个机器人系统(具有不可忽略惯性的非完整地面机器人和四旋翼机器人),其目标是在事先未知的环境中安全导航并到达目标目的地。在这些应用中,我们提出了一种从周期性获得的感知数据生成局部CBF的简单方法。

英文摘要:

We present a closed-form optimal feedback control method that ensures safety in an a prior unknown and potentially dynamic environment. This article considers the scenario where local perception data (e.g., LiDAR) is obtained periodically, and this data can be used to construct a local control barrier function (CBF) that models a local set that is safe for a period of time into the future. Then, we use a smooth time-varying soft-maximum function to compose the N most recently obtained local CBFs into a single barrier function that models an approximate union of the N most recently obtained local sets. This composite barrier function is used in a constrained quadratic optimization, which is solved in closed form to obtain a safe-and-optimal feedback control. We also apply the time-varying soft-maximum barrier function control to 2 robotic systems (nonholonomic ground robot with nonnegligible inertia, and quadrotor robot), where the objective is to navigate an a priori unknown environment safely and reach a target destination. In these applications, we present a simple approach to generate local CBFs from periodically obtained perception data.

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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