Yazar "Türkay, Semiha" için Makale Koleksiyonu listeleme
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Frequency domain subispace-based identification of discrete-time power spectra from nonuniformly spaced measurements
Akçay, Hüseyin; Türkay, Semiha (Pergamon-Elsevier Science LTD, 2004)In this paper, we present a new subspace-based algorithm for the identification of multi-input/multi-output, square, discrete-time, linear-time invariant systems from nonuniformly spaced power spectrum measurements. The ... -
Identification of continuous-time power spectra by generalized Fourier series
Akçay, Hüseyin; Türkay, Semiha (Chinese Automatic Control Soc, 2007)In this paper, we present a generalized Fourier series based algorithm for the identification of continuous-time, linear-time invariant systems from power spectrum measurements. The algorithm is strongly consistent and it ... -
Influence of Tire Damping on Actively Controlled Quarter-Car Suspensions
Akçay, Hüseyin; Türkay, Semiha (Asme, 2011)In this note, a comprehensive analysis of tire damping effect on H-2-optimal, multi-objective, and robust control of quarter-car suspensions excited by random road disturbances is provided. First, H-2-optimal and convex ... -
Influence of tire damping on mixed H-2/H-infinity synthesis of half car active suspensions
Akçay, Hüseyin; Türkay, Semiha (Academic Press LTD- Elsevier Science LTD, 2009)In this paper, multi-objective control of a half-car suspension system using linear matrix inequalities is studied. It is observed that when tire damping is precisely known, road-holding quality of the suspension system ... -
Multi-objective control of a full-car model using linear-matrix-inequalities and fixed-order optimisation
Türkay, Semiha; Akçay, Hüseyin (Taylor & Francis LTD, 2014)This paper studies multi-objective control of a full-vehicle suspension excited by random road disturbances. The control problem is first formulated as a mixed H-2/H synthesis problem and an output-feedback solution is ... -
Power spectrum estimation in innovation models
Akçay, Hüseyin; Türkay, Semiha (Academic Press LTD- Elsevier Science LTD, 2019)In this paper, a regularized nuclear norm minimization-based subspace identification algorithm is proposed to estimate discrete-time power spectra of multi-input/multi-out systems in innovation models from output-only ... -
Rational interpolation of analytic functions from real or imaginary parts of frequency-response data: A subspace-based approach
Akçay, Hüseyin; Türkay, Semiha (2009)In this letter, construction of analytic functions from evaluations of real or imaginary parts on finite subsets of the unit circle is studied. The points in the subsets are not necessarily uniformly spaced as in the most ... -
Road Roughness Evaluation by Curve-Fitting and Subspace-Identification Methods
Türkay, Semiha; Akçay, Hüseyin (Asce-Amer Soc Civil Engineers, 2016)In this paper, for a quarter-car model, root-mean square response variables are calculated for roads classified by the international standard organization, based on the straight-line spectrum models. Covariance expressions ... -
Spectrum estimation with missing values: A regularized nuclear norm minimization approach
Akçay, Hüseyin; Türkay, Semiha (World Scientific Publ Co Pte LTD, 2016)In this paper, we consider estimation of a power spectrum from noise corrupted spectrum samples on uniform grids of frequencies with missing values. We propose two schemes based on the regularized nuclear norm minimization ... -
Stochastic optimal control of truck cabin with active suspension
Akçay, Hüseyin; Türkay, Semiha (Inderscience Enterprises LTD, 2014)In this paper, a three-degree-of-freedom cabin model for a commercial truck is derived to study ride motions of the cabin under random road excitations. First, an active suspension system is designed using the linear-Nqu ... -
A study of random vibration characteristics of the quarter-car model
Türkay, Semiha; Akçay, Hüseyin (Academic Press LTD Elsevier Science LTD, 2005)In this paper, the quarter-car model is used to study the response of the vehicle to profile imposed excitation with randomly varying traverse velocity and variable vehicle forward velocity. Root-mean-square response of ... -
A subspace-based method for solving Lagrange-Sylvester interpolation problems
Akçay, Hüseyin; Türkay, Semiha (Siam Publications, 2007)In this paper, we study the Lagrange-Sylvester interpolation of rational matrix functions which are analytic at infinity, and propose a new interpolation algorithm based on the recent subspace-based identification methods. ... -
Subspace-based spectrum estimation in innovation models by mixed norm minimization
Akçay, Hüseyin; Türkay, Semiha (Pergamon-Elsevier Science LTD, 2019)In this paper, identification of discrete-time power spectra of multi-input/multi-output (MIMO) systems in innovation models from output-only time-domain measurements is considered.A hybrid identification algorithm unifying ... -
Tire Damping Effect on H-2 Optimal Control of Half-Car Active Suspensions
Türkay, Semiha; Akçay, Hüseyin (Asme-Amer Soc Mechanical Eng, 2010)In this note the root-mean-square response of a half-car model following a random road profile is studied. Road excitation at the front wheel is modeled by a first-order linear shape filter driven by white-noise and the ...