A Local Controller for Discrete-Time Large-Scale System by Using Integral Variable Structure Control

A new local controller for discrete-time integral variable structure control of a large-scale system with matched and unmatched uncertainty is presented. the local controller is able to bring the large-scale system into stability by using only the states feedback from individual subsystem itself. a new theorem is established and proved that the controller is able to handle the effect of interconnection for the large-scale system with matched and unmatched uncertainty,and the system stability is ensured. the controller is able to control the system to achieve the quasi-sliding surface and remains on it. the results showed a fast convergence to the desired value and the attenuation of disturbance is achieved. © 2015 c. h. chai and johari h. s. osman.