Discreet controller structure for robust oscillating nonlinear stable system

This paper is presented to investigate the validity of designing a discreet controller of feed- forward and feedback structure which may be used to improve the dynamic performance of either linear or nonlinear systems. By transforming the continuous plant as well as transforming the associated controller to the discreet domain with including all parameters changes and their influence for closed loop stability as well as the desired robust control synthesis, we can construct the required controller to ensure the overall stability of strong oscillating dynamic model. This algorithm was verified by using different numerical models. The results obtained are compared with those given in the speed control of switched reluctance motor based on the hybrid fuzzy variable structure control FSMC with the concept of Lyap nov second method. Practically we can conclude that the FVSC technique may be recommended to overcome some of the drawbacks associated with the application of the discreet controller structure algorithm.