Design Sliding Control for Non-Affine Nonlinear Systems

In this paper we present result of sliding control for non-affine nonlinear systems. Because nonlinear systems have complex behaviors, their analysis is very difficult and there is no general method for designing nonlinear controllers. Global linearization control (GLC) is Conventional approach for nonlinear system can not be used for all nonlinear systems such as non-minimum phase system and it is not robust in the presence of parameter uncertainty or unmodeled dynamics. By defining an area of certain surface, many researchers succeed in using this sliding mode method for linear and non-linear systems. Sliding control is robust method. In this paper we used sliding control for two constant volume reactors with exothermic reaction that is non-affine non linear system. The results of sliding control produce a better response of closed loop system than the GLC and PID controllers.

Keywords:

sliding control , nonlinear system , non- affine systems