Yazar "Akçay, Hüseyin" için listeleme
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An insight into instrumental variable frequency-domain subspace identification
Akçay, Hüseyin (Pergamon-Elsevier Science LTD, 2010)In this paper, we study instrumental variable subspace identification of multi-input/multi-output linear-time-invariant, discrete-time systems from non-uniformly spaced frequency response measurements. A particular algorithm, ... -
Instrumental variable frequency-domain subspace identification
Akçay, Hüseyin (2010)In this paper, we study instrumental variable subspace identification of multi-input/multi-output linear-time-invariant, discrete-time systems from non-uniformly spaced frequency response measurements. A particular algorithm, ... -
Linear quadratic gaussian regulator design for a half car vehicle model
Ağırman, Erhan (Anadolu Üniversitesi, 2007)Bu çalışma aktif otomotiv süspansiyonlarının LQG teknikleri kullanılarak kontrolü ile ilgilidir. Tesadüfî yol gürültüsüne maruz kalan bir yarım araba modelinin analitik incelemesi yapılıp aktif süspansiyon sistemlerin ... -
Membership set identification with periodic inputs and orthonormal regressors
Akçay, Hüseyin; At, Nuray (Elsevier Science BV, 2006)In this paper, we study the central and the projection algorithms in membership-set estimation with periodic input signals and orthonormal basis functions for the special case that the number of the estimated parameters ... -
Modeling of hysteresis and power losses in transformer laminations
Akçay, Hüseyin; Ece, Dugan Gökhan (IEEE-Inst Electrical Electronics Engineers Inc, 2003)In this paper, a method for the representation of hysteresis and power losses in the laminations of power transformers is proposed. The developed model is based on data supplied from steel manufacturer and able to predict ... -
Modelling of road roughness for full-car models: a spectral factorization approach
Türkay, Semiha; Akçay, Hüseyin (IEEE, 2016)In this paper, we study modelling of road roughness for full-car models from power spectrum and coherence measurements of parallel tracks. The modelling problem is cast as a spectral factorization problem and solved via ... -
Multi-objective control design for a truck cabin
Türkay, Semiha; Akçay, Hüseyin (IFAC Secretariat, 2014)In this paper, a multi-objective control of a three-degrees-of-freedom cabin model for a commercial truck excited by random road disturbances is studied. The multi-objective control problem is formulated as a non-convex ... -
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 ... -
Multi-objective control of full-vehicle suspensions: A case study
Türkay, Semiha; Akçay, Hüseyin (IFAC Secretariat, 2011)This paper presents two procedures for multi-objective control of a full-vehicle suspension excited by random road disturbances. The control problem is first formulated as a mixed H2/H? synthesis problem and an output ... -
Multi-Objective Design for Half-Car Active Suspensions
Türkay, Semiha; Akçay, Hüseyin (IEEE, 2012)In this paper, multi-objective control of a half-car suspension system is formulated as a mixed H-2/H-infinity synthesis problem and this convex problem is solved using linear matrix inequalities. Then, the control design ... -
Multiobjective output feedback via LMI optimization and quarter-car actice suspension system
Soyiç, Aslı (Anadolu Üniversitesi, 2009)Bu tezde, doğrusal matris esitşizlik tabanlı otomatik kontrol yaklaşımı ve bu yaklaşımın bir uygulaması olarak düşey ivme ölçümlü çeyrek araç modeli aktif süspansiyon sistemi tasarımı çalışılmıştır. Tasarım amaçları H? ... -
Nuclear Norm Spectrum Estimation From Uniformly Spaced Measurements
Akçay, Hüseyin (IEEE-Inst Electrical Electronics Engineers Inc, 2014)Subspace-based methods have been effectively used to estimate multi-input/multi-output, discrete-time, linear-time invariant systems from uniformly spaced spectrum samples. A critical step in these methods is the splitting ... -
On the existence of a disk algebra basis
Akçay, Hüseyin (Elsevier Science BV, 2000)In this paper, approximation of discrete-time systems by fixed pole orthonormal basis functions is investigated. It is shown that if accumulation points of basis poles do not cover the entire unit circle, then the Fourier ... -
On the performance limitations of quarter-car active suspension models
Türkay, Semiha; Akçay, Hüseyin (2007)In this paper, constraints on the road disturbance transfer functions are derived for a quarter-car active suspension system. The derived constraints complement the existing constraints in the literature. By using the ... -
On the uniform approximation of discrete-time systems by generalized Fourier series
Akçay, Hüseyin (IEEE-Inst Electrical Electronics Engineers Inc, 2001)In this paper, model sets for linear time-invariant discrete-time systems spanned by fixed orthonormal bases are studied. It is shown that the Fourier series of the system transfer function with respect to these bases ... -
Paley inequalities for discrete-time rational orthonormal bases
Akçay, Hüseyin (Elsevier Science BV, 2000)In this paper, we derive some inequalities which provide information about the Fourier coefficients of linear-time-invariant discrete-time systems with respect to the bounded rational orthonormal basis functions studied ... -
Parallel Track Models from Road Measurements
Akçay, Hüseyin; Türkay, Semiha (IEEE, 2017)In this paper, coherence function estimation for parallel tracks from road measurements is studied. A two-stage scheme is proposed. In the first stage, the measurements are de-trended and periodic components are removed. ... -
Positive realness in stochastic subspace identification: A regularized and reweighted nuclear norm minimization approach
Akçay, Hüseyin; Türkay, Semiha (Institute of Electrical and Electronics Engineers Inc., 2015)In this paper, we propose a method to transform a non-positive real transfer function matrix into a positive real one. This problem is of engineering interest and arises when a linear time-invarant dynamics is identified ... -
Positive Realness in Stochastic Subspace Identification: A Regularized and Reweighted Nuclear Norm Minimization Approach
Akçay, Hüseyin; Türkay, Semiha (IEEE, 2015)In this paper, we propose a method to transform a non-positive real transfer function matrix into a positive real one. This problem is of engineering interest and arises when a linear time-invarant dynamics is identified ... -
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 ...