Unit vector approach based sliding mode control of a small-scale unmanned helicopter

A sliding mode controller is applied to an uncertain small-scale unmanned helicopter. This paper explores the capability of this control technique in the context of the regulating problem. The corresponding uncertain model has both matched and unmatched uncertainties. The applied sliding mode control design methodology is so-called unit vector approach. Considering some of uncertain model parameters, computer simulations were carried out to validate the suitability of the proposed approach.