VIRGINIA UNIV CHARLOTTESVILLE DEPT OF ELECTRICAL ENGINEERING
This is a study of vibration control for large space structures. Advantage is taken of the limiting performance characteristics of dynamic systems. This approach permits large problems with constraints to be analyzed. A modal formulation for the limiting performance was developed in order to enhance the applicability of limiting performance to large structural systems. One effort to develop an optimal control system is based on the limiting performance approach in combination with classicaloptimal control theory. A limiting-performanceminimum-time solution was formulated to achieve the goal of rapid suppression of disturbances. Classicaloptimal control studies show that a position loop might be useful in taking care of constraint controllers, such as proof-mass dampers. Finally, to derive feedback control law based on the limiting performance characteristics, parameter identification technique has been under investigation.