Now showing items 1-18 of 18

    • Adaptive control design for nonlinear systems via successive approximations 

      Babaei, N.; Salamci, M. U.; Karakurt, A. H. (American Society of Mechanical Engineers, 2017)
      The paper presents an approach to the Model Reference Adaptive Control (MRAC) design for nonlinear dynamical systems. A nonlinear reference system is considered such that its response is designed to be stable via Successive ...
    • Adaptive robust sampled-data control of a class of systems under structured perturbations 

      Yu, R.; Ocali, O; Sezer, E. S. (IEEE, 1993)
      Robust adaptive sampled-data control of a class of linear systems under structured perturbations is considered. The controller is a time-varying state-feedback law having a fixed structure, containing an adjustable parameter, ...
    • Cumulant-based parametric multichannel FIR system identification methods 

      Özgen, M. T.; Alshebeili, S. A.; Çetin, A. E.; Venetsanopoulos, A. N. (Elsevier, 1994)
      In this paper, “least squares” and recursive methods for simultaneous identification of four nonminimum phase linear, time-invariant FIR systems are presented. The methods utilize the second- and fourth-order cumulants of ...
    • Decentralized strong stabilization problem 

      Özgüler, A. B.; Ünyelioğlu, K. A. (American Automatic Control Council, 1992)
      In the decentralized strong stabilization problem for linear time-invariant finite-dimensional systems, the objective is to stabilize a given plant using a stable decentralized controller. A solvability condition for this ...
    • Effects of linear filter on stability and performance of human-in-the-loop model reference adaptive control architectures 

      Yousefi, E.; Demir, D. F.; Sipahi, R.; Yucelen, T.; Yildiz, Y. (American Society of Mechanical Engineers, 2017)
      Model reference adaptive control (MRAC) can effectively handle various challenges of the real world control problems including exogenous disturbances, system uncertainties, and degraded modes of operations. In human-in-the-loop ...
    • Experimental study of linear closed-loop control of subsonic cavity flow 

      Yan P.; Debiasi, M.; Yuan X.; Little J.; Özbay H.; Samimy, M. (2006)
      A study is presented of the modeling and implementation of different concepts for linear feedback control of a single-mode resonance shallow cavity flow. When a physics-based linear model is used for cavity pressure ...
    • Fixed zeros of decentralized control systems 

      ÜÜnyelioglu, K. A.; Özgüner, Ü.; Özgüler, A. B. (IEEE, 2000)
      This paper considers the notion of decentralized fixed zeros for linear, time-invariant, finite-dimensional systems. For an N-channel plant that is free of unstable decentralized fixed modes, an unstable decentralized fixed ...
    • Global stabilization via local stabilizing actions 

      Özgüler, A. B. (Institute of Electrical and Electronics Engineers, 2006)
      Stabilization of a linear, time-invariant system via stabilization of its main diagonal subsytems is the underlying problem in all diagonal dominance techniques for decentralized control. In these techniques as well as all ...
    • LQ optimal design at finitely many frequencies 

      Köroğlu, H.; Morgül, Ö. (Institute of Electrical and Electronics Engineers, 1998)
      The notion of Linear Quadratic (LQ) optimality at a single frequency is developed in single-input single-output (SISO) linear time-invariant (LTI) system/quasi-stationary signal framework and the optimality condition is ...
    • 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 ...
    • On the Set of All Stabilizing First-Order Controllers 

      Saadaoui, K.; Özgüler, A.B. (2003)
      A computational method is given for determining the set of all stabilizing proper first-order controllers for finite dimensional, linear, time invariant, scalar plants. The method is based on a generalized Hermite-Bie ...
    • On the stabilization and stability robustness against small delays of some damped wave equations 

      Morgül, O. (IEEE, 1995)
      In this note we consider a system which can be modeled by two different one-dimensional damped wave equations in a bounded domain, both parameterized by a nonnegative damping constant. We assume that the system is fixed ...
    • On the stabilization of a cable with a tip mass 

      Morgül, Ö.; Rao, B. P.; Conrad, F. (IEEE, 1994)
      In this note, we consider a vertical cable which is pinched at the upper end. A mass is attached at the lower end where a control force is also applied. We show that this hybrid system is uniformly stabilized by choosing ...
    • PI and low-order controllers for two-channel decentralized systems 

      Gündeş, A.N.; Özgüler, A.B. (2003)
      A systematic design method is proposed for simple loworder decentralized controllers in the cascaded form of proportional-integral and first-order blocks. The plant is linear, time-invariant and has two channels, ...
    • Plant Order Reduction for Controller Design 

      Özgüler, A.B.; Gündeş, A.N. (2003)
      Two dual methods of plant order reduction for controller design are proposed for linear, time-invariant, multi-input multi-output systems. The model reduction methods are tailored towards closed-loop stability and performance ...
    • Reduced-order model-based feedback controller design for subsonic cavity flows 

      Yuan X.; Caraballo, E.; Yan P.; Özbay, H.; Serrani, A.; DeBonis J.; Myatt J.H.; Samimy, M. (2005)
      This paper explores feedback controller design for cavity flows based on reduced-order models derived using Proper Orthogonal Decomposition (POD) along with Galerkin projection method. Our preliminary analysis shows that ...
    • Robust LQ control for harmonic reference/disturbance signals 

      Köroǧlu, H.; Morgül, Ö (Institute of Electrical and Electronics Engineers, 2000)
      Linear Quadratic (LQ) controller design is considered for continuous-time systems with harmonic signals of known frequencies and it is shown that the design is reducible to an interpolation problem. All LQ optimal loops ...
    • Tracking and regulation control of a 2-DOF robot arm with unbalance 

      Güler, S.; Özgüler, A.B. (2012)
      Servomechanism synthesis for a two degree-of-freedom robot arm assembled on a vessel and affected from sea disturbances is considered. Dynamic equations of the robot arm with unbalance and of an approximate base disturbance ...