Browsing by Subject "Robustness (control systems)"

Now showing items 21-40 of 66

    • Article  

      Mobile agents for wireless computing: The convergence of wireless computational models with mobile-agent technologies 

      Spyrou, Christiana; Samaras, George S.; Pitoura, Evaggelia 1967-; Evripidou, Paraskevas (2004)
      Wireless mobile computing breaks the stationary barrier and allows users to compute and access information from anywhere and at anytime. However, this new freedom of movement does not come without new challenges. The mobile ...
    • Article  

      Model Reference Adaptive Control for Plants with Unknown Relative Degree 

      Ioannou, Petros A.; Tao, G. (1993)
      One of the basic assumptions in stable model reference adaptive control (MRAC) that the relative degree n002A of the modeled part of the plant is known exactly and matches that of the reference model is relaxed by the ...
    • Article  

      Multiple model adaptive control with mixing 

      Kuipers, M.; Ioannou, Petros A. (2010)
      Despite the remarkable theoretical accomplishments and successful applications of adaptive control, the field is not sufficiently mature to solve challenging control problems where strict performance and robustness guarantees ...
    • Article  

      Multiple model adaptive mixing control: The discrete-time case 

      Baldi, S.; Ioannou, Petros A.; Mosca, E. (2012)
      Most of the work in multiple model adaptive control with various forms of switching focused on continuous-time systems. The purpose of this technical note is to extend the results of one approach, the adaptive mixing control ...
    • Conference Object  

      Necessary conditions for partially observed diffusions 

      Charalambous, Charalambos D.; Hibey, Joseph L. (IEEE, 1993)
      We present a new approach to deriving necessary conditions for stochastic partially observed control problems when the control enters the drift coefficient, and correlation between signal and observation noise is allowed. ...
    • Conference Object  

      Neural network control of unknown systems 

      Kosmatopoulos, Elias B.; Chassiakos, Anastassios; Boussalis, Helen R.; Mirmirani, Maj; Ioannou, Petros A. (IEEE, 1998)
      In this paper, we show that for all unknown Multi-Input (MI) nonlinear system that affected by external disturbances, it is possible to construct a semi-global state-feedback stabilizer when the only information about the ...
    • Article  

      A new class of nonlinear robust adaptive controllers 

      Zhang, Y.; Ioannou, Petros A. (1996)
      Recently, a new class of adaptive control schemes, motivated from nonlinear systems theory, has been proposed for minimum phase linear time invariant plants. Under certain assumptions on the plant transfer function, these ...
    • Article  

      A new linear adaptive controller: Design, analysis and performance 

      Zhang, Y.; Ioannou, Petros A. (2000)
      The certainty equivalence and polynomial approach, widely used for designing adaptive controllers, leads to "simple" adaptive control designs that guarantee stability, asymptotic error convergence, and robustness, but not ...
    • Conference Object  

      A new robust adaptive control scheme for linear time varying plants 

      Fidan, B.; Zhang, Y.; Ioannou, Petros A. (2002)
      In a recent work, a new linear adaptive controller based on certainty-equivalence and backstepping design, which promises a level of transient and asymptotic performance comparable to that of the tuning functions adaptive ...
    • Article  

      On the Stability Proof of Adaptive Schemes with Static Normalizing Signals and Parameter Projection 

      Tsao, T.; Ioannou, Petros A. (1993)
      Recently, it has been shown [8] that robust stability in model-reference adaptive control (MRAC) is guaranteed by simply using a static, instead of a dynamic, normalizing signal together with a parameter projection in the ...
    • Conference Object  

      Optimization of nonlinear stochastic uncertain relaxed controlled systems: Entropy rate functional and robustness 

      Rezaei, F.; Charalambous, Charalambos D.; Kyprianou, Andreas (2004)
      This paper is concerned with nonlinear stochastic uncertain relaxed controlled difussions, in which the pay-off is described by the relative entropy between the nominal measure and the uncertain measure, when the uncertain ...
    • Conference Object  

      Optimization of nonlinear stochastic uncertain relaxed controlled systems: Entropy rate functional and robustness 

      Rezaei, F.; Charalambous, C. D.; Kyprianou, Andreas (Affiliation: Sch. of Info. Technol. and Eng., University of Ottawa, 800 King Edward Ave., Ottawa, Ont. K1N 6N5, CanadaAffiliation: Sch. of Info. Technol. and Eng., University of Ottawa, 161 Louis Pasteur, A519, Ottawa, Ont. K1N 6N5, CanadaAffiliation: Electrical Engineering Department, University of Cyprus, 75 Kallipoleos Avenue, Nicosia, CyprusAffiliation: Mechanical Engineering Department, University of Cyprus, 75 Kallipoleos Avenue, Nicosia, CyprusCorrespondence Address: Rezaei, F.Sch. of Info. Technol. and Eng., University of Ottawa, 800 King Edward Ave., Ottawa, Ont. K1N 6N5, Canadaemail: frezaei@site.uottawa.ca, 2004)
      This paper is concerned with nonlinear stochastic uncertain relaxed controlled difussions, in which the pay-off is described by the relative entropy between the nominal measure and the uncertain measure, when the uncertain ...
    • Conference Object  

      Optimization of nonlinear stochastic uncertain relaxed controlled systems: Entropy rate functional and robustness 

      Rezaei, F.; Charalambous, Charalambos D.; Kyprianou, Andreas (Affiliation: Sch. of Info. Technol. and Eng., University of Ottawa, 800 King Edward Ave., Ottawa, Ont. K1N 6N5, CanadaAffiliation: Sch. of Info. Technol. and Eng., University of Ottawa, 161 Louis Pasteur, A519, Ottawa, Ont. K1N 6N5, CanadaAffiliation: Electrical Engineering Department, University of Cyprus, 75 Kallipoleos Avenue, Nicosia, CyprusAffiliation: Mechanical Engineering Department, University of Cyprus, 75 Kallipoleos Avenue, Nicosia, CyprusCorrespondence Address: Rezaei, F.Sch. of Info. Technol. and Eng., University of Ottawa, 800 King Edward Ave., Ottawa, Ont. K1N 6N5, Canadaemail: frezaei@site.uottawa.ca, 2004)
      This paper is concerned with nonlinear stochastic uncertain relaxed controlled difussions, in which the pay-off is described by the relative entropy between the nominal measure and the uncertain measure, when the uncertain ...
    • Conference Object  

      Optimization of Stochastic Uncertain Systems: Large Deviations and Robustness 

      Charalambous, Charalambos D.; Rezaei, F. (2003)
      This paper is concerned with an abstract formulation of stochastic uncertain control systems, in which the pay-off is described by the relative entropy between the nominal measure and the uncertain measure, while the ...
    • Article  

      A p-version MITC finite element method for Reissner-Mindlin plates with curved boundaries 

      Xenophontos, Christos A.; Kurtz, J.; Fulton, S. (2006)
      We consider the approximation of Reissner-Mindlin plates with curved boundaries, using a p-version MITC finite element method. We describe in detail the formulation and implementation of the method, and emphasize the need ...
    • Conference Object  

      A Perfect Reconstruction Paradigm for Digital Communication 

      Voulgaris, P. G.; Hadjicostis, Christoforos N.; Touri, R. (2003)
      In this paper we present a deterministic worst-case framework for reconstruction of discrete data transmissions through dispersive communication channels. This framework can be explored based on robust control ideas and ...
    • Article  

      Performance Analysis And Improvement In Model Reference Adaptive Control 

      Datta, Aniruddha; Ioannou, Petros A. (1994)
      Boundedness of all closed-loop signals and asymptotic convergence of the tracking error to zero or to a residual set are the criteria that have been most commonly used to characterize the performance of model reference ...
    • Conference Object  

      Performance improvement versus robust stability in model reference adaptive control 

      Datta, Aniruddha; Ioannou, Petros A. (Publ by IEEE, 1992)
      The mean square tracking error criterion and the L∞ tracking error bound criterion are used to assess the performance of a standard robust model reference adaptive control schemes in ideal and nonideal situations. Controller ...
    • Article  

      A probabilistic reasoning approach for discovering web crawler sessions 

      Stassopoulou, Athena; Dikaiakos, Marios D. (2007)
      In this paper we introduce a probabilistic-reasoning approach to detect Web robots (crawlers) from human visitors of Web sites. Our approach employs a Naive Bayes network to classify the HTTP sessions of a Web-server access ...
    • Conference Object  

      Remarks on the explicit solutions for nonlinear partially observable stochastic control problems and relations to H∞ or robust control 

      Charalambous, Charalambos D.; Elliott, Robert J. (IEEE, 1995)
      Partially observable stochastic and H∞ control problems are considered. The dynamics include nonlinearities which are the gradient of some potential function in addition to linear terms, the observations are linear, and ...