Active vibration control of smart composite beams using PSO-optimized self-tuning fuzzy logic controller

This paper presents the optimized fuzzy logic controller (FLC) with on-line tuning of scaling factors for vibration control of thin-walled composite beams. In order to improve the performances and robustness properties of FLC, the proposed method adjusts the input scaling factors via peak observer. The membership functions of the proposed FLC are optimized using the particle swarm optimization (PSO) algorithm. The composite beam is modeled by the third-order shear deformation theory (TSDT) and discretized by using the finite element method. Several numerical examples are provided for the cantilever composite beam under a periodic excitation and periodic excitation with an unexpected disturbance. In order to present the efficiency of the proposed controller, the obtained results are compared with the corresponding results in the cases of the optimized FLCs with constant scaling factors and LQR optimal control strategy.