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arXiv · 2609.39895

Exact Noise Limits for Bounded Scalar Stabilization Experiments

Alexey Peregudin·Ngoc Tuan Dinh
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Abstract

How much unknown process noise can a bounded experiment tolerate while still establishing that the plant can be stabilized? We answer this question for scalar discrete-time systems with bounded inputs, exact state measurements, and a disturbance-energy budget proportional to the experiment length. We distinguish individual stabilizability of every consistent model, stabilization by one common gain, and a common quadratic certificate. We determine their exact noise ceilings for every drift. The last two requirements coincide; individual stabilizability generally tolerates more noise. Bounded periodic inputs approach the ceilings, while adversarial disturbances prevent their attainment. We also determine the long-horizon limits. For unstable plants, a short experiment can establish individual stabilizability at noise levels where every sufficiently long experiment fails. The same obstruction yields upper bounds for multidimensional systems with real eigenvalues. Input design may use plant knowledge, but certification uses only the recorded data and noise bound. The results therefore provide fundamental robustness benchmarks for unknown-plant designs.

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Alexey Peregudin, Ngoc Tuan Dinh. 2026-09-30. Exact Noise Limits for Bounded Scalar Stabilization Experiments. https://arxiv.org/abs/2609.39895

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