Hussein Obeid : "Contribution to adaptive control and observation..."...

Travaux : "Contribution to adaptive control and observation by higher order sliding modes - application to energy management systems"

Abstract : This thesis deals with the development of novel strategies to adapt higher  arder  sliding  mode controllers and observers. The implementation of classics first  arder  and higher  order  sliding  mode controllers requires  the knowledge of the upper bound of the disturbance  or its derivative, which are often  not known.  The first  contribution of this  thesis  is the design of an adaptive  strategy  that  can ensure the convergence  of the sliding  variable  to a predefined neighborhood of zero without requiring any information of the disturbance or its derivative and without  overestimating the adaptive  gain. This adaptive strategy  is then declined  for the design of the first  arder, second arder and integral  sliding  mode controllers, and for the Levant's  differentiator. The second contribution of the thesis is the development of two adaptive  strategies for discontinuous higher  arder  sliding  mode control.  The proposed  two algorithms can provide  the achievement of n-order sliding  mode despite disturbances with unknown  upper  bounds or with unknown upper  bounds of their  derivatives. Finally, in arder  to show the effectiveness of the proposed  algorithms, they are successfully  applied  through simulations to control the wind energy conversion system  and the linear  induction motor  system  for cogeneration.

Localisation : UTBM - Site Belfort, Rue Thierry Mieg - Amphi I102 - Bâtiment I