Safety-Critical Control of Stochastic Systems using Stochastic Control Barrier Functions
Safety-Critical Control of Stochastic Systems using Stochastic Control Barrier Functions
复制标题
使用随机控制障碍函数的随机系统的安全关键控制
DOI:
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复制
发表时间:
2021
期刊:
影响因子:
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通讯作者:
Jun Liu
中科院分区:
文献类型:
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作者:
Chuanzhen Wang;Yiming Meng;Stephen L. Smith;Jun Liu
Control barrier functions have been widely used for synthesizing safety-critical controls, often via solving quadratic programs. However, the existence of Gaussian-type noise may lead to unsafe actions and result in severe consequences. In this paper, we study systems modeled by stochastic differential equations (SDEs) driven by Brownian motions. We propose a notion of stochastic control barrier functions (SCBFs) and show that SCBFs can significantly reduce the control efforts, especially in the presence of noise, compared to stochastic reciprocal control barrier functions (SRCBFs), and offer a less conservative estimation of safety probability, compared to stochastic zeroing control barrier functions (SZCBFs). Based on this less conservative probabilistic estimation for the proposed notion of SCBFs, we further extend the results to handle high relative degree safety constraints using high-order SCBFs. We demonstrate that the proposed SCBFs achieve good trade-offs of performance and control efforts, both through theoretical analysis and numerical simulations.
DOI:
10.23919/acc.2019.8814901
发表时间:
2019
期刊:
American Control Conference (ACC
影响因子:
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作者:
Clark, A.
通讯作者:
Clark, A.