arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2003.07094math.OCmath.DS
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基于插值Koopman发生器的数据驱动模型预测控制

Data-Driven Model Predictive Control using Interpolated Koopman Generators

Sebastian Peitz, Samuel E. Otto, Clarence W. Rowley

摘要:

近年来,Koopman算子在动力系统分析中的成功也推动了基于Koopman算子的控制框架的发展。为了通过动态模式分解保持近似的相对较低的数据要求,最近在[Peitz \& Klus,Automatica 106,2019]中提出了一种量化方法。通过这种方式,非线性动力系统的控制可以通过切换系统技术来实现,仅使用有限集的基于自主Koopman算子的降阶模型。这些单独的系统可以非常有效地从数据中近似。其主要思想是将一个控制系统转化为一组自治系统,并计算其最优开关序列。在这篇文章中,我们将这些结果扩展到连续控制输入松弛。通过这种方式,我们结合了近似自治系统的有限集的数据效率与连续控制的优点。我们表明,当使用Koopman生成器,这种松弛-实现两个运营商之间的线性插值-不引入任何错误的控制仿射系统。这使我们能够控制高维非线性系统使用双线性,低维代理模型。所提出的方法的效率证明了使用几个例子越来越复杂,从Duffing振荡器的混沌流体弹球。

英文摘要:

In recent years, the success of the Koopman operator in dynamical systems analysis has also fueled the development of Koopman operator-based control frameworks. In order to preserve the relatively low data requirements for an approximation via Dynamic Mode Decomposition, a quantization approach was recently proposed in [Peitz \& Klus, Automatica 106, 2019]. This way, control of nonlinear dynamical systems can be realized by means of switched systems techniques, using only a finite set of autonomous Koopman operator-based reduced models. These individual systems can be approximated very efficiently from data. The main idea is to transform a control system into a set of autonomous systems for which the optimal switching sequence has to be computed. In this article, we extend these results to continuous control inputs using relaxation. This way, we combine the advantages of the data efficiency of approximating a finite set of autonomous systems with continuous controls. We show that when using the Koopman generator, this relaxation --- realized by linear interpolation between two operators --- does not introduce any error for control affine systems. This allows us to control high-dimensional nonlinear systems using bilinear, low-dimensional surrogate models. The efficiency of the proposed approach is demonstrated using several examples with increasing complexity, from the Duffing oscillator to the chaotic fluidic pinball.

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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