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arXiv · 2508.17251

One Equation to Rule Them All -- Part II: Direct Data-Driven Reduction and Regulation

Junyu Mao·Emyr Williams·Thulasi Mylvaganam·Giordano Scarciotti
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Abstract

The Sylvester equation underpins a wide spectrum of control synthesis and systems analysis tools associated with cascade interconnections. In the preceding Part I [1] of this article, it was shown that such an equation can be reformulated using data, enabling the production of a collection of data-driven stabilisation procedures. In this second part of the article, we continue to develop the framework established in Part I to solve two important control-theoretic problems: model order reduction and output regulation. For the model order reduction problem we provide a solution from input-state measurements, from input-output measurements, and we study the effect of the noise. For the output regulation problem, we provide data-driven solutions for the static and dynamic feedback problem. The proposed designs are illustrated by means of examples.

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Junyu Mao, Emyr Williams, Thulasi Mylvaganam, Giordano Scarciotti. 2025-08-24. One Equation to Rule Them All -- Part II: Direct Data-Driven Reduction and Regulation. https://arxiv.org/abs/2508.17251

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