Abstract
The simultaneous design optimization of smart structures is often performed in the control system design framework. However, it is essentially a multiobjective optimization problem where multiple systems including structures, sensors and actuators need to be optimized simultaneously. Although a LQ problem is a kind of multiobjective optimization that has two opposing objectives (energy and performance) in its cost function, the degrees of freedom and applicable scope of the cost function is limited. In this paper, the effectiveness of the multiobjective optimization approach for designing a smart structure system is demonstrated. Piezoelectric actuator is often used in the smart structure system. It is also demonstrated that the nonlinear and hysteresis effects of the piezoelectric actuators are effectively considered in this approach.
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