Integral tangent adaptive fuzzy sliding mode control for engine

In this paper, on the basis of sliding mode control theory, a new integral tangent adaptive fuzzy sliding mode control for aircraft engine was proposed. Based on the uncertainty model of aircraft engine, a hyperbolic tangent integral sliding surface was constructed at first, and it effectively overcome the problem of integral saturation effect which was often occur in the traditional integral sliding surface. Then, fuzzy control rules were adopted to improve exponential reaching law and reduce chattering. Next, an adaptive law was given to estimate the upper bound of uncertainty in the system in order to overcome the problem that the bound of uncertainty is unknown, and the integral tangent fuzzy adaptive sliding mode controller of aircraft engine was obtained at last. Simulation results show that the proposed method can effectively reduce the steady-state error and improve the transient performance of the system, and it has strong robustness.