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arXiv · 2505.10811

Optimal $\mathbb{H}_2$ Control with Passivity-Constrained Feedback: Convex Approach

J. T. Scruggs
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Abstract

We consider the $\Set{H}_2$-optimal feedback control problem, for the case in which the plant is passive with bounded $\Set{L}_2$ gain, and the feedback law is constrained to be output-strictly passive. We show that this problem distills to a convex, infinite-dimensional optimal control problem, in which the optimization domain is the Youla parameter for the closed-loop system. We devise truncated, finite-dimensional optimizations to find sub-optimal controllers, and lower bounds on the optimal objective. Furthermore we show that both these optimizations converge to the optimal objective of the original infinite-dimensional problem as their respective domains are increased. The idea is demonstrated on a simple vibration suppression example.

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J. T. Scruggs. 2026-07-18. Optimal $\mathbb{H}_2$ Control with Passivity-Constrained Feedback: Convex Approach. https://arxiv.org/abs/2505.10811

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