VARIABLE-STRUCTURE CONTROL OF DISCRETIZED CONTINUOUS-TIME SYSTEMS

A novel discrete-time variable structure control technique is presente d in this paper for uncertain continuous-time systems. The design algo rithm makes use of the concept of time-delay control in order to estim ate the effects of the system perturbations inside the switching regio n. The controller performances have been evaluated by simulation using a benchmark problem proposed in literature. A satisfactory behavior i s obtained also in the presence of remarkable uncertainties, showing n oticeable robustness with respect to parameter variations and external disturbances. Moreover, the time-response characteristics can be shap ed by the designer, properly tuning the control algorithm parameters.