Abstract: In the smart structures with vibration suppression function, robustness of the controller is important to ensure the ideal result when the parameters of the structures vary. The simple fuzzy logic controller can not maintain the good control result when the structures vary greatly. With the idea of the sliding mode control, a direct adaptive fuzzy sliding mode controller is designed. The basic control is divided into an equivalent control and a switch control, which are approximated by two sets of the fuzzy logic separately; and the adaptive laws are designed to ensure the system’s stability. The comparison results show the effectiveness of the direct adaptive fuzzy sliding mode controller on smart structures.

Key words: Adaptive fuzzy logic control, Sliding mode control, Smart structure