Fuzzy Logic Control on Smart Structure based on Optimal Placement of Piezoelectric Patch

In order to reduce the vibration of smart structures, this paper gets the optimal location of piezoelectric patch by the D-optimal design principle, and then uses a fuzzy logic controller which was designed base on optimal fuzzy rules to control it. The D-optimal design principle is an optimization method which chosen by the maximum determinant of Fisher information matrix criteria. Study on the mode shapes and dynamic characteristics of structure, and the mode shapes of selected structural are converted into unitary mode. In order to approach higher level of vibration control, piezoelectric patches are placed on the maximum mode strain locations of the structure. This paper designs a fuzzy logic controller with a new method which according to the analysis of the motion traits of the beam. The simulation results show that this controller has more superiority than the ordinary controller.