• Conference Object  

      Model reference adaptive control for plants with unknown relative degree 

      Tao, G.; Ioannou, Petros A. (Publ by IEEE, 1989)
      One of the basic assumptions in stable model reference adaptive control is that the relative degree n* of the modeled part of the plant is known exactly and matches that of the reference model. The authors relax this ...
    • Conference Object  

      Persistency of excitation and overparameterization in model reference adaptive control 

      Tao, G.; Ioannou, Petros A. (Publ by IEEE, 1988)
      It is shown that if a model-reference adaptive controller is designed for an overparameterized plant, the persistence of excitation of the measured vector signal in the adaptive loop will be lost independently of the number ...
    • Article  

      Persistency of excitation and overparametrization in model reference adaptive control 

      Tao, G.; Ioannou, Petros A. (1990)
      In an overparametrized model reference adaptive control system, the measured signal (t) cannot be persistently exciting (PE) for any bounded reference input r(t). The controller parameter vector for model-plant transfer ...
    • Article  

      Robust adaptive control of bilinear plants 

      Tao, G.; Ioannou, Petros A. (1989)
      A robust model reference adaptive control scheme for bilinear plants with bounded disturbances is developed. Global stability of the closed-loop adaptive system is guaranteed by using a switching-a- modified adaptive law. ...