A study on robustness property of sliding-mode controllers: a noveldesign and experimental investigations |
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Authors: | Erbatur K. Kaynak M.O. Sabanovic A. |
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Affiliation: | Intelligent Syst. Group, Tubitak Marmara Res. Center, Kocaeli; |
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Abstract: | The robustness property of sliding-mode controllers (SMCs) makes them attractive for industrial control applications. However, this property is valid only under ideal sliding-mode conditions. Additionally, practical SMCs are likely to exhibit high-frequency oscillations in the plant output, called chattering, and to excite unmodeled dynamics. A novel, chattering-free sliding-mode control algorithm design, based on Lyapunov stability criteria, is considered in this paper. The control algorithm developed is experimentally implemented on a direct-drive manipulator for various payload configurations. It is seen that the controller carries a certain amount of robustness property, the trajectory-following performance being only slightly affected by the changes in the payload. A comparison of the experimental results with those obtained by a well-tuned proportional-derivative control is also given |
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