Title :
Adaptive observers for nonlinear nonpassifiable systems with application to signal transmission
Author :
Fradov, A.L. ; Nikiforov, V.O. ; Andrievsky, B.R.
Author_Institution :
Inst. for Problems of Mech. Eng., Acad. of Sci., St. Petersburg, Russia
Abstract :
A unified approach to signal transmission based on adaptive observers and passification is extended to nonpassifiable nonlinear systems, particularly to systems with relative degree greater than one. Two versions of signal transmission scheme are proposed based on augmented error adaptive observer and high-order tuners. Conditions of parametric convergence of the message estimation for the noiseless case and robustness of the scheme to the bounded channel noise are established. An example of information transmission by means of Lorenz system is given.
Keywords :
adaptive systems; noise; nonlinear systems; observers; robust control; tuning; Lorenz system; adaptive observers; augmented error adaptive observer; bounded channel noise; high order tuners; information transmission; message estimation; noiseless case; nonlinear nonpassifiable systems; parametric convergence; passification; robustness; signal transmission; Additive noise; Chaotic communication; Convergence; Mechanical engineering; Noise robustness; Nonlinear optics; Nonlinear systems; Observers; Optical transmitters; Tuners;
Conference_Titel :
Decision and Control, 2002, Proceedings of the 41st IEEE Conference on
Print_ISBN :
0-7803-7516-5
DOI :
10.1109/CDC.2002.1185121
