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arXiv 1911.12349eess.SYcs.SY
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降阶模型预测控制的误差界

Error Bounds for Reduced Order Model Predictive Control

Joseph Lorenzetti, Marco Pavone

摘要:

模型预测控制是一个强大的框架,使约束系统的最优控制。然而,对于由高维状态空间描述的系统,这种框架对于实时控制来说在计算上要求太高。降阶模型预测控制(ROMPC)框架通过利用模型降阶技术来压缩在线最优控制问题中使用的状态空间模型来解决这个问题。虽然这可以通过降低在线计算要求来实现实时控制,但这些模型简化引入了近似误差,必须考虑这些近似误差以保证受控高维系统的约束满足和闭环稳定性。在这项工作中,我们提出了一个离线的方法,有效地计算模型简化所产生的误差范围,并显示它们如何可以用来保证约束满意度在以前提出的ROMPC框架。这项工作认为,线性,离散,时不变的系统被压缩的彼得罗夫-伽辽金投影,并考虑输出反馈设置系统也受到有界干扰。

英文摘要:

Model predictive control is a powerful framework for enabling optimal control of constrained systems. However, for systems that are described by high-dimensional state spaces this framework can be too computationally demanding for real-time control. Reduced order model predictive control (ROMPC) frameworks address this issue by leveraging model reduction techniques to compress the state space model used in the online optimal control problem. While this can enable real-time control by decreasing the online computational requirements, these model reductions introduce approximation errors that must be accounted for to guarantee constraint satisfaction and closed-loop stability for the controlled high-dimensional system. In this work we propose an offline methodology for efficiently computing error bounds arising from model reduction, and show how they can be used to guarantee constraint satisfaction in a previously proposed ROMPC framework. This work considers linear, discrete, time-invariant systems that are compressed by Petrov-Galerkin projections, and considers output-feedback settings where the system is also subject to bounded disturbances.

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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