Wasserstein Distributionally Robust Motion Control for Collision Avoidance Using Conditional Value-at-Risk
Wasserstein Distributionally Robust Motion Control for Collision Avoidance Using Conditional Value-at-Risk
复制标题
Wasserstein 使用条件风险值避免碰撞的分布式鲁棒运动控制
DOI:
10.1109/tro.2021.3106827
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发表时间:
2020
影响因子:
7.8
通讯作者:
Insoon Yang
中科院分区:
文献类型:
--
作者:
A. Hakobyan;Insoon Yang
In this article, a risk-aware motion control scheme is considered for mobile robots to avoid randomly moving obstacles when the true probability distribution of uncertainty is unknown. We propose a novel model-predictive control (MPC) method for limiting the risk of unsafety even when the true distribution of the obstacles’ movements deviates, within an ambiguity set, from the empirical distribution obtained using a limited amount of sample data. By choosing the ambiguity set as a statistical ball with its radius measured by the Wasserstein metric, we achieve a probabilistic guarantee of the out-of-sample risk, evaluated using new sample data generated independently of the training data. To resolve the infinite-dimensionality issue inherent in the distributionally robust MPC problem, we reformulate it as a finite-dimensional nonlinear program using modern distributionally robust optimization techniques based on the Kantorovich duality principle. To find a globally optimal solution in the case of affine dynamics and output equations, a spatial branch-and-bound algorithm is designed using McCormick relaxation. The performance of the proposed method is demonstrated and analyzed through simulation studies using nonlinear dynamic and kinematic vehicle models and a linearized quadrotor model. The simulation results indicate that, even when the sample size is small, the proposed method can successfully avoid randomly moving obstacles with a guarantee of out-of-sample risk, while its sample average approximation counterpart fails to do so.
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DOI:
10.1016/j.orl.2018.01.011
发表时间:
2018-03
期刊:
Oper. Res. Lett.
影响因子:
--
作者:
Chaoyue Zhao;Yongpei Guan
通讯作者:
Chaoyue Zhao;Yongpei Guan
DOI:
10.23919/acc.2018.8430957
发表时间:
2018
期刊:
2018 Annual American Control Conference (ACC
影响因子:
--
作者:
Samuelson, Samantha;Yang, Insoon
通讯作者:
Yang, Insoon
影响因子:
3
作者:
Insoon Yang
通讯作者:
Insoon Yang
DOI:
10.1016/j.automatica.2018.04.022
发表时间:
2017-01
期刊:
Autom.
影响因子:
--
作者:
Insoon Yang
通讯作者:
Insoon Yang