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arXiv 2503.18521eess.SYcs.SYmath.OC
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模型预测控制中的约束时域

Constraint Horizon in Model Predictive Control

Allan Andre Do Nascimento, Han Wang, Antonis Papachristodoulou, Kostas Margellos

AI总结:

本研究提出含预测时域和约束时域的MPC公式,既推广了闭环最优性估计框架,又改进了传统CBF方法,解决了CLF与CBF约束的兼容性问题,经数值仿真验证有效。

摘要:

在本研究中,我们提出了一种包含两种不同时域的模型预测控制(MPC,Model Predictive Control)公式:预测时域与约束时域。该方法能够在不损害递归可行性与约束满足性的前提下,让人们更深入地理解约束如何影响次优性等关键系统特性。围绕这一方向,我们的贡献分为两点。第一,我们提供了一个框架,可将闭环最优性估计为强制约束数量的函数。这是对现有结果的推广,因为它考虑了预测时域上的部分约束执行情况。第二,当从安全关键型应用的视角采用这一通用框架时,我们的方法改进了传统的基于控制屏障函数(CBF,Control Barrier Function)的方法。它缓解了二次规划(QP,Quadratic Programming)-CBF方案中的短视行为,并通过优化中使用的预测时域解决了控制李雅普诺夫函数(CLF,Control Lyapunov Function)与CBF约束之间的兼容性问题。我们通过针对一项安全关键应用的数值仿真,验证了该方法的有效性。

英文摘要:

In this work, we propose a Model Predictive Control (MPC) formulation incorporating two distinct horizons: a prediction horizon and a constraint horizon. This approach enables a deeper understanding of how constraints influence key system properties such as suboptimality, without compromising recursive feasibility and constraint satisfaction. In this direction, our contributions are twofold. First, we provide a framework to estimate closed-loop optimality as a function of the number of enforced constraints. This is a generalization of existing results by considering partial constraint enforcement over the prediction horizon. Second, when adopting this general framework under the lens of safety-critical applications, our method improves conventional Control Barrier Function (CBF) based approaches. It mitigates myopic behaviour in Quadratic Programming (QP)-CBF schemes, and resolves compatibility issues between Control Lyapunov Function (CLF) and CBF constraints via the prediction horizon used in the optimization. We show the efficacy of the method via numerical simulations for a safety critical application.

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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