APPROACH FOR SIMULTANEOUS-OPTIMIZATION OF A STRUCTURE AND CONTROL-SYSTEM

A new approach is presented for simultaneous structural and control op timum design of a system. The design variables of both the structural and the control parameters are optimized simultaneously by the sensiti vity analysis to minimize the response due to disturbances of both whi te noise and colored noise subjected to a constraint so that the syste m is stable corresponding to high-order natural modes. Three kinds of models are adopted in this approach, namely, the original spatial mode l by finite element method, the reduced modal model for designing the control system, and the original modal model for assuring stability of the system. The validity and the usefulness of the present approach a re verified by a vibration control experiment of a steel plate.