Title :
An algebraic parameter estimation approach to the adaptive observer-controller based regulation of the boost converter
Author :
Sira-Ramírez, H. ; Spinetti-Rivera, M. ; Fossas-Colet, E.
Author_Institution :
CINVESTAV-IPN, San Pedro
Abstract :
In this article, a new approach is proposed for the problem of output voltage reference trajectory tracking in a boost converter with unknown, piecewise constant, load resistance values, under the restriction of noisy output voltage measurements alone. We use a nonlinear algebraic parameter estimation approach for the fast computation of the actual value of the stepwise changing load. With this information, a reduced order nonlinear observer for the inductor current is updated as well as a static passive output feedback control law derived on the basis of the exact tracking error dynamics and Lyapunov stability considerations. The average nonlinear adaptive observer-controller scheme is implemented on the switch regulated converter using the averaging features of a Sigma - Delta modulator.
Keywords :
DC-DC power convertors; Lyapunov methods; adaptive control; nonlinear control systems; observers; parameter estimation; reduced order systems; switching convertors; voltage control; Lyapunov stability; Sigma - Delta modulator; algebraic parameter estimation; boost converter; feedback control law; inductor current; nonlinear adaptive observer-controller; reduced order nonlinear observer; tracking error dynamics; voltage measurements; voltage reference trajectory tracking; Delta modulation; Error correction; Inductors; Lyapunov method; Output feedback; Parameter estimation; Switches; Switching converters; Trajectory; Voltage measurement;
Conference_Titel :
Industrial Electronics, 2007. ISIE 2007. IEEE International Symposium on
Conference_Location :
Vigo
Print_ISBN :
978-1-4244-0754-5
Electronic_ISBN :
978-1-4244-0755-2
DOI :
10.1109/ISIE.2007.4375157