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arXiv 2103.03677math.OCcs.SYeess.SY
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采样数据系统中的控制Barrier Functions

Control Barrier Functions in Sampled-Data Systems

Joseph Breeden, Kunal Garg, Dimitra Panagou

摘要:

本文给出了具有分段常数控制器和固定时间步长的采样数据系统动力学中保证安全集前向不变性的条件。首先,我们引入两种不同的度量来比较分段常数控制器下前向不变性的充分条件的保守性。然后,我们提出了三种方法来保证前向不变性,两个动机的连续时间障碍函数,和一个动机的离散时间障碍函数。所有建议的条件是控制仿射,因此可以纳入二次规划控制综合。我们表明,所提出的条件是不太保守的比那些在早期的研究,并通过模拟显示,这使得使用障碍功能,是不可能实现所需的时间步长使用现有的方法。

英文摘要:

This paper presents conditions for ensuring forward invariance of safe sets under sampled-data system dynamics with piecewise-constant controllers and fixed time-steps. First, we introduce two different metrics to compare the conservativeness of sufficient conditions on forward invariance under piecewise-constant controllers. Then, we propose three approaches for guaranteeing forward invariance, two motivated by continuous-time barrier functions, and one motivated by discrete-time barrier functions. All proposed conditions are control affine, and thus can be incorporated into quadratic programs for control synthesis. We show that the proposed conditions are less conservative than those in earlier studies, and show via simulation how this enables the use of barrier functions that are impossible to implement with the desired time-step using existing methods.

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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