Browsing by Subject "SYSTEM STABILITY"

Now showing items 1-10 of 10

    • Article  

      An Asymptotic Error Analysis of Identifiers and Adaptive Observers in the Presence of Parasitics 

      Ioannou, Petros A.; Kokotovic, P. V. (1982)
      The behavior of identifiers and adaptive observers in the presence of parasitics is analyzed. Bounds for the state/parameter error are established. The adaptive schemes considered are shown to be robust provided the input ...
    • Article  

      Decentralized Adaptive Control of Interconnected Systems 

      Ioannou, Petros A. (1986)
      The adaptive control of a class of large-scale systems formed of an arbitrary interconnection of subsystems with unknown parameters, nonlinearities, and bounded disturbances is investigated. It is first shown that no matter ...
    • Article  

      Decentralized adaptive control of interconnected systems with reduced-order models 

      Ioannou, Petros A.; Kokotovic, P. (1985)
      The adaptive control of interconnected systems whose subsystems possess slow and fast modes is investigated in the presence of external disturbances. A simple example is first used to show that a decentralized adaptive ...
    • Article  

      Discrete-time decentralized adaptive control 

      Reed, J. S.; Ioannou, Petros A. (1988)
      A discrete-time decentralized model reference adaptive controller is presented for a large-scale system composed of N interconnected single-input single-output linear subsystems with unknown parameters and unmodeled dynamics. ...
    • Article  

      FREQUENCY DOMAIN CONDITIONS FOR STRICTLY POSITIVE REAL FUNCTIONS. 

      Ioannou, Petros A.; Tao, Gang (1987)
      Frequency-domain conditions for strictly positive real (SPR) functions which appear in literature are often only necessary or only sufficient. This point is raised by B. D. O. Anderson and S. Vongpanitlerd (1973), and J. ...
    • Conference Object  

      GENERAL ROBUST ADAPTIVE LAW FOR TUNING CONTROLLERS. 

      Ioannou, Petros A.; Sun, J. (IEEE, 1986)
      A general robust adaptive law is developed which can stably tune model-reference and pole-placement control schemes despite the presence of unmodeled dynamics and bounded disturbances. The analysis shows that a switching- ...
    • Conference Object  

      Parameter estimation and pole-placement control of time-varying plants. 

      Tsakalis, Kostas S.; Ioannou, Petros A. (Publ by American Automatic Control Council, 1988)
      The pole placement and adaptive pole placement control problem of linear time-varying plants with smooth parameters is considered. A controller structure is proposed which guarantees the closed-loop stability and meets the ...
    • Conference Object  

      ROBUST ADAPTIVE CONTROLLER WITH ZERO RESIDUAL TRACKING ERRORS. 

      Ioannou, Petros A. (IEEE, 1985)
      The adaptive control of a plant whose dominant part has a transfer function with relative degree n*** equals 1 has been considered in the presence of parasitics and disturbances. A new adaptive law is proposed which ...
    • Conference Object  

      Robust model reference adaptive control for multivariable plants. 

      Tao, G.; Ioannou, Petros A. (Publ by American Automatic Control Council, 1988)
      A complete procedure for generating and analyzing robust model-reference adaptive control schemes for multivariable plants is developed. It includes: the characterization of the integral structure of the modeled part of ...
    • Article  

      Robust Redesign of Adaptive Control 

      Ioannou, Petros A.; Kokotovic, P. V. (1984)
      Effects of unmodeled high frequency dynamics on stability and performance of adaptive control schemes are analyzed. In the regulation problem global stability properties are no longer guaranteed, but a region of attraction ...