arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2003.03498math.OC
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随机系统的控制Barrier Functions

Control Barrier Functions for Stochastic Systems

Andrew Clark

摘要:

控制障碍函数(CBF)的目的是通过在每个时间步约束控制输入,使系统状态保持在所需的安全区域内,以确保安全。本文提出了一个在高斯过程和测量噪声存在下的随机系统中的CBF的框架。我们首先考虑的情况下,系统的状态是已知的,在每个时间步,并提出倒数和零CBF的建设,保证安全的概率为1。我们将我们的结果扩展到具有线性动力学和仿射安全约束的高相对度系统。然后,我们开发CBFs的不完整的状态信息的环境中,必须使用被高斯噪声损坏的传感器估计的状态。我们证明,我们提出的CBF确保安全的概率为1时,状态估计是在一个给定的范围内的真实状态,这可以实现使用扩展卡尔曼滤波器时,系统是线性的或过程和测量噪声足够小。我们提出的控制策略,结合这些CBF与控制李雅普诺夫函数,以共同确保安全性和随机稳定性。我们的研究结果是通过多智能体避碰的例子数值研究进行验证。

英文摘要:

Control Barrier Functions (CBFs) aim to ensure safety by constraining the control input at each time step so that the system state remains within a desired safe region. This paper presents a framework for CBFs in stochastic systems in the presence of Gaussian process and measurement noise. We first consider the case where the system state is known at each time step, and present reciprocal and zero CBF constructions that guarantee safety with probability 1. We extend our results to high relative degree systems with linear dynamics and affine safety constraints. We then develop CBFs for incomplete state information environments, in which the state must be estimated using sensors that are corrupted by Gaussian noise. We prove that our proposed CBF ensures safety with probability 1 when the state estimate is within a given bound of the true state, which can be achieved using an Extended Kalman Filter when the system is linear or the process and measurement noise are sufficiently small. We propose control policies that combine these CBFs with Control Lyapunov Functions in order to jointly ensure safety and stochastic stability. Our results are validated via numerical study on a multi-agent collision avoidance example.

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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