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2012.10418

Interpolatory Methods for Generic BizJet Gust Load Alleviation Function

C. Poussot-Vassal, P. Vuillemin, O. Cantinaud, F. Sève

correctmedium confidence
Category
Not specified
Journal tier
Specialist/Solid
Processed
Sep 28, 2025, 12:55 AM

Audit review

The paper defines the Nyquist-band discretization error e∞, chooses 2m frequencies, enforces R(iωk)Kd(e^{iωkh}) = K(iωk), builds a Loewner interpolant from the data {zk=e^{iωkh}, R(iωk)^{-1}K(iωk)}, compresses it to minimal order via SVD, and finally enforces stability by a Nehari projection P∞, noting the potential order drop by the multiplicity m of the largest unstable Hankel singular value and recommending pre-projection “slack” to hit an order cap (Algorithm 1) . The candidate solution mirrors this pipeline step-for-step (tangential Loewner data and descriptor realization; SVD-based minimal projection; Nehari projection with degree drop by m; add slack) and adds a simple a posteriori inequality e∞(K,Kd) ≤ e∞(K,Kr_d) + ||Kr_d − Kd||L∞ using |R(iω)| ≤ 1, which is consistent with the paper’s evaluation guidance (compute ||Kr_d−Kd||L∞ as an error proxy) . No substantive conflicts were found.

Referee report (LaTeX)

\textbf{Recommendation:} minor revisions

\textbf{Journal Tier:} specialist/solid

\textbf{Justification:}

The submission accurately unifies Loewner interpolation with a discrete-time Nehari projection to discretize controllers with high Nyquist-band fidelity. The pipeline and claims (interpolation, minimality via SVD, L∞-optimal stability enforcement with degree drop by multiplicity m, and pre-projection slack) are standard and correctly cited; empirical evidence supports the method. Minor clarifications on assumptions and an explicit a posteriori bound would further improve clarity. The candidate solution reproduces and slightly strengthens the paper’s presentation without contradiction.