Developing a control strategy that can handle model uncertainties, external disturbances, and parameter fluctuations is essential for the desired operation of a nonlinear system. An attempt is made to develop such a control algorithm using the Learning Variable Structure Control technique. The proposed controllers have the advantages of both iterative learning control (ILC) and sliding mode control (SMC) such that they can compensate both structured and unstructured uncertainties. They are made comprised of modified-twisting algorithm and super-twisting algorithm respectively with the ILC technique.In this article, the performance of the two developed controllers is compared to a traditional SMC-based ILC approach. Based on simulation results, the super-twisting algorithm based ILC is found to be superior with reference to speed of convergence and tracking accuracy. This method is used to control the slip-ratio of an electric vehicle as a specific application in this paper.
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