Now showing items 1-16 of 16

    • Decentralized control and periodic feedback 

      Khargonekar P. P.; Özgüler, A. B. (IEEE, 1994)
      The decentralized stabilization problem for linear, discretetime, periodically time-varying plants using periodic controllers is considered. The main tool used is the technique of lifting a periodic system to a time-invariant ...
    • Discrete-time LQ optimal repetitive control 

      Köroğlu, H.; Morgül, Ö. (IEEE, 1999)
      LQ optimal repetitive control is developed in single-input single-output discrete-time signal/system framework. For a given plant and a stabilizing controller, the LQ optimal repetitive control system can be obtained by ...
    • Explicit time-delay compensation in teleoperation: an adaptive control approach 

      Abidi K.; Yildiz, Y.; Korpe, B. E. (John Wiley and Sons Ltd, 2016)
      This paper proposes a control framework that addresses the destabilizing effect of communication time delays and system uncertainties in telerobotics, in the presence of force feedback. Force feedback is necessary to obtain ...
    • Interpolating between periodicity and discreteness through the fractional Fourier transform 

      Özaktaş, H. M.; Sümbül, U. (IEEE, 2006)
      Periodicity and discreteness are Fourier duals in the same sense as operators such as coordinate multiplication and differentiation, and translation and phase shift. The fractional Fourier transform allows interpolation ...
    • Model based anticontrol of discrete-tiime systems 

      Morgül, Ö. (Institute of Electrical and Electronics Engineers, 2003)
      We will consider a model-based approach for the anticontrol of some discrete-time systems. We first assume the existence of a chaotic model in an appropriate form. Then by using an appropriate control input we try to match ...
    • A model-based scheme for anticontrol of some discrete-time chaotic systems 

      Morgül, Ö. (World Scientific, 2004)
      We consider a model-based approach for the anticontrol of some discrete-time systems. We first assume the existence of a chaotic model in an appropriate form. Then by using an appropriate control input we try to match the ...
    • A new delayed feedback control scheme for discrete time chaotic systems 

      Morgül, Ö. (2009)
      In this paper we consider the stabilization problem of unstable periodic orbits of discrete time chaotic systems. We consider both one dimensional and higher dimensional cases. We propose a novel generalization of the ...
    • A new method for the computation of all stabilizing controllers of a given order 

      Saadaoui, K.; Özgüler, A. B. (Taylor & Francis, 2005)
      A new method is given for computing the set of all stabilizing controllers of a given order for linear, time invariant, scalar plants. The method is based on a generalized Hermite-Biehler theorem and the successive application ...
    • A new periodic controller for discrete time chaotic systems 

      Morgül, Ö. (World Scientific Publishing Co. Pte. Ltd., 2010)
      In this paper we consider the stabilization problem of unstable periodic orbits of discrete time chaotic systems. For simplicity we consider only one dimensional case. We propose a novel periodic feedback controller law ...
    • On the discrete adaptive posicast controller 

      Abidi, K.; Yildiz, Y. (IFAC Secretariat, 2015)
      In this paper, we present the discrete version of the Adaptive Posicast Controller (APC) that deals with parametric uncertainties in systems with input time-delays. The continuous-time APC is based on the Smith Predictor ...
    • Reducing the dispersion errors of the finite-difference time-domain method for multifrequency plane-wave excitations 

      Oğuz, U.; Gürel, L. (Taylor & Francis, 2003)
      We demonstrate the applications of discrete-time signal-processing (SP) techniques for the purpose of generating accurate plane waves in the finite-difference time-domain (FDTD) method. The SP techniques are used either ...
    • Robust stability of discrete-time systems under parametric perturbations 

      Karan, M.; Sezer, M. E.; Ocali, O. (IEEE, 1994-05)
      Stability robustness analysis of a system under parametric perturbations is concerned with characterizing a region in the parameter space in which the system remains stable. In this paper, two methods are presented to ...
    • A stability result for delayed feedback controllers 

      Morgül, Ö. (Institute of Electrical and Electronics Engineers, 2003)
      We consider the delayed feedback control (DFC) scheme for one dimensional discrete time systems. To analyze the stability, we construct a map whose fixed points correspond to the periodic orbits of the system to be controlled. ...
    • Stability results for some periodic feedback controllers 

      Morgül, O. (2005)
      We propose two periodic feedback schemes for the stabilization of periodic orbits for one dimensional discrete time chaotic systems. These schemes can be generalized to higher dimensional systems in a straightforward way. ...
    • Stabilization of unstable periodic orbits for discrete time chaotic systems by using periodic feedback 

      Morgül, Ö. (World Scientific Publishing, 2006)
      We propose a periodic feedback scheme for the stabilization of periodic orbits for discrete time chaotic systems. We first consider one-dimensional discrete time systems and obtain some stability results. Then we extend ...
    • Synchronization and chaotic masking scheme based on occasional coupling 

      Morgül, Ö. (American Physical Society, 2000)
      Synchronization and a related message transmission scheme using synchronized chaotic systems was presented for discrete-time systems. The scheme was based on occasional coupling of transmitter and receiver systems. The ...