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arXiv 2004.02907eess.SYcs.SY
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闭环机会约束满足的数据驱动分布式随机模型预测控制

Data-Driven Distributed Stochastic Model Predictive Control with Closed-Loop Chance Constraint Satisfaction

Simon Muntwiler, Kim P. Wabersich, Lukas Hewing, Melanie N. Zeilinger

摘要:

不确定系统的分布式模型预测控制方法通常具有相当大的保守性,并且由于使用了服从分布式设计和优化方法的鲁棒公式,因此只能容忍很小的不确定性。在这项工作中,我们提出了一个分布式随机模型预测控制(DSMPC)计划的动态耦合线性离散时间系统的无界附加干扰,潜在的时间相关。一个间接的反馈公式,确保递归的可行性的DSMPC问题,和数据驱动的,分布式的和无优化的约束收紧方法允许在闭环控制过程中的机会约束的精确满足,解决典型的保守性来源。所提出的控制器的计算复杂度是类似的名义分布式MPC。该方法被证明在模拟的温度控制的一个大型数据中心随机变化的计算负载。

英文摘要:

Distributed model predictive control methods for uncertain systems often suffer from considerable conservatism and can tolerate only small uncertainties due to the use of robust formulations that are amenable to distributed design and optimization methods. In this work, we propose a distributed stochastic model predictive control (DSMPC) scheme for dynamically coupled linear discrete-time systems subject to unbounded additive disturbances that are potentially correlated in time. An indirect feedback formulation ensures recursive feasibility of the DSMPC problem, and a data-driven, distributed and optimization-free constraint tightening approach allows for exact satisfaction of chance constraints during closed-loop control, addressing typical sources of conservatism. The computational complexity of the proposed controller is similar to nominal distributed MPC. The approach is demonstrated in simulation for the temperature control of a large-scale data center subject to randomly varying computational loads.

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