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arXiv 2007.10149math.OCmath.DS
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多尺度混合约束MPC的对偶动态规划

Dual Dynamic Programming for Multi-Scale Mixed-Integer MPC

Ranjeet Kumar, Michael J. Wenzel, Mohammad N. ElBsat, Michael J. Risbeck, Kirk H. Drees, Victor M. Zavala

摘要:

提出了一种求解多尺度混合整数模型预测控制(MPC)问题的对偶动态整数规划(DDIP)框架。这样的问题出现在涉及长视野和/或精细时间离散化以及混合整数状态和控制(例如,调度逻辑和离散致动器)。该方法使用了一个嵌套的切割平面计划,执行前向和后向扫描沿时间范围自适应近似成本去功能。DDIP方案可以处理一般MPC配方与混合整数控制和状态,并可以执行前向-后向扫描块时间分区。我们证明了所提出的方案的性能,通过解决混合整数MPC的问题,出现在中央供暖,通风和空调(HVAC)工厂的调度。我们表明,该计划是可扩展的,并显着优于最先进的混合整数求解器。

英文摘要:

We propose a dual dynamic integer programming (DDIP) framework for solving multi-scale mixed-integer model predictive control (MPC) problems. Such problems arise in applications that involve long horizons and/or fine temporal discretizations as well as mixed-integer states and controls (e.g., scheduling logic and discrete actuators). The approach uses a nested cutting-plane scheme that performs forward and backward sweeps along the time horizon to adaptively approximate cost-to-go functions. The DDIP scheme proposed can handle general MPC formulations with mixed-integer controls and states and can perform forward-backward sweeps over block time partitions. We demonstrate the performance of the proposed scheme by solving mixed-integer MPC problems that arise in the scheduling of central heating, ventilation, and air-conditioning (HVAC) plants. We show that the proposed scheme is scalable and dramatically outperforms state-of-the-art mixed-integer solvers.

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