arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2403.16619eess.SYcs.SY
收藏

引导式贝叶斯优化:基于数字孪生的数据高效控制器调整

Guided Bayesian Optimization: Data-Efficient Controller Tuning with Digital Twin

Mahdi Nobar, Jürg Keller, Alisa Rupenyan, Mohammad Khosravi, John Lygeros

AI总结:

本文提出guided Bayesian optimization算法,利用事件触发的digital twin指导无模型闭环控制器参数调整,在减少物理实验次数的同时高效找到最优参数。

摘要:

本文提出了guided Bayesian optimization算法,这是一种高效的数据驱动方法,利用基于可用闭环数据的系统事件触发digital twin,迭代调整闭环控制器参数。我们定义了一个独立于控制器或plant结构的控制器调整框架。我们提出的方法是无模型的,使其适用于具有测量噪声的非线性和未建模plant。目标函数由Gaussian processes建模的性能指标组成。我们利用闭环系统中的可用信息来识别并逐步维护digital twin,以指导优化器,从而提高我们方法的数据效率。digital twin的开启和关闭由与BO调整框架中digital twin不确定性估计相关的数据驱动标准触发。实际上,它用digital twin上的探索代替了对真实系统的大部分探索。我们在仿真中分析了我们方法的属性,并在两个具有不同plant和控制器结构的真实闭环系统上展示了其性能。实验结果表明,与Bayesian optimization相比,我们的方法在物理plant上需要更少的实验即可找到最优控制器参数。

英文摘要:

This article presents the guided Bayesian optimization algorithm as an efficient data-driven method for iteratively tuning closed-loop controller parameters using an event-triggered digital twin of the system based on available closed-loop data. We define a controller tuning framework independent of the controller or the plant structure. Our proposed methodology is model-free, making it suitable for nonlinear and unmodelled plants with measurement noise. The objective function consists of performance metrics modeled by Gaussian processes. We utilize the available information in the closed-loop system to identify and progressively maintain a digital twin that guides the optimizer, improving the data efficiency of our method. Switching the digital twin on and off is triggered by data-driven criteria related to the digital twin's uncertainty estimations in the BO tuning framework. Effectively, it replaces much of the exploration of the real system with exploration performed on the digital twin. We analyze the properties of our method in simulation and demonstrate its performance on two real closed-loop systems with different plant and controller structures. The experimental results show that our method requires fewer experiments on the physical plant than Bayesian optimization to find the optimal controller parameters.

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。

↑