Robustness Verification for Flexible Structures via Interval Control Systems

摘要

A new robust control scheme is implemented for vibration control of flexible structures. The study of interval control systems has been the subject of much controls and systems research in the recent years. This methodology for control allows engineers to develop a system which accounts for all types of uncertain parametric changes which take place in the system. A SVD based modeling technique is described here for developing an interval model that represents an uncertain experimental system. The test bed is a ten-bay aluminum truss-like structure. A reaction mass actuator (RMA) is used as the force actuator device for controlling the structure. A standard local velocity feedback controller is implemented to control the structure. Added mass to structural nodes represents parametric uncertainty. Using the tools developed for interval control systems analysis, the system performance is analyzed in detail in terms of it frequency responses and locations of poles.