Abstract
This paper discusses a displacement control problem in a multi-layer composite disk consisting of a transversely isotropic structural layer onto which piezoelectric layers of crystal class 6mm are perfectly bonded. It is considered that some electrodes are arranged concentrically on the top surface of each piezoelectric layer. When a stationary heating temperature distribution acts on the bottom surface of the composite disk, the thermally induced elastic displacement on the structural layer surface can be controlled by applying appropriate voltages to the electrodes. In order to maximize the function of displacement control, an optimum design of the electrode arrangements is performed. The applied voltages are determined by using the quasi-Newton method based on the BFGS updating formula, whereas the electrode arrangements are determined by employing the particle swarm optimization (PSO). Numerical calculations have been carried out for a composite disk consisting of a CFRP layer and cadmium selenide layers .Obtained numerical results are shown in tabular and graphical forms.
