no code implementations • 1 Apr 2024 • Anastasios Tsiamis, Mohamed Abdalmoaty, Roy S. Smith, John Lygeros

The error rate is of the order of $\mathcal{O}((d_{\mathrm{u}}+\sqrt{d_{\mathrm{u}}d_{\mathrm{y}}})\sqrt{M/N_{\mathrm{tot}}})$, where $N_{\mathrm{tot}}$ is the total number of samples, $M$ is the number of desired frequencies, and $d_{\mathrm{u}},\, d_{\mathrm{y}}$ are the dimensions of the input and output signals respectively.

no code implementations • 23 Mar 2024 • Mohamed Abdalmoaty, Roy S. Smith

We revisit the problem of non-parametric closed-loop identification in frequency domain; we give a brief survey of the literature and provide a small noise analysis of the direct, indirect, and joint input-output methods when two independent experiments with identical excitation are used.

no code implementations • 22 Mar 2024 • Roy S. Smith, Mohamed Abdalmoaty, Mingzhou Yin

Data-driven control uses a past signal trajectory to characterise the input-output behaviour of a system.

no code implementations • 9 Mar 2024 • Mohamed Abdalmoaty, Efe C. Balta, John Lygeros, Roy S. Smith

It is well known that ignoring the presence of stochastic disturbances in the identification of stochastic Wiener models leads to asymptotically biased estimators.

no code implementations • 25 Dec 2023 • Mohamed Abdalmoaty, Jared Miller, Mingzhou Yin, Roy S. Smith

We propose a computationally tractable method for the identification of stable canonical discrete-time rational transfer function models, using frequency domain data.

no code implementations • 20 Nov 2022 • Mohamed Abdalmoaty, Alexander Medvedev

An algorithm for continuous time-delay estimation from sampled output data and known input of finite energy is presented.

no code implementations • 14 Nov 2022 • Mohamed Abdalmoaty, Sribalaji C. Anand, André M. H. Teixeira

We consider an adversary which first learns the system dynamics (privacy) using system identification techniques, and then performs a data injection attack (security).

no code implementations • 26 Jul 2022 • Mohamed Abdalmoaty, Alexander Medvedev

This paper introduces a stochastic framework for a recently proposed discrete-time delay estimation method in Laguerre-domain, i. e. with the delay block input and output signals being represented by the corresponding Laguerre series.

no code implementations • 4 May 2022 • Anubhab Ghosh, Mohamed Abdalmoaty, Saikat Chatterjee, Håkan Hjalmarsson

Yet, estimating the unknown parameters of stochastic, nonlinear dynamical models remains a challenging problem.

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