Output Feedback Sliding Mode Control for Bending and Torsional Vibration Control of 6-Stories Flexible Structure.

Abstract

We discuss bending and torsional vibration control of the 6-stories flexible structure. In the case where they consider structural control like high rise building, it is required to design a controller to have good control performance and simple designing for cutting down on personnel. So, we apply sliding mode control that is nonlinear robust control theory. Adopting this theory, control system design becomes very easy, and it takes too short time to design. However this controller is done by state feedback in general way, and it is difScult to do. Because it's few cases that sensors are placed in all stories. For this, sliding mode controller should be designed with output feedback, so we designed two output feedback sliding mode controller by using minimum error excitation method. The first is constructed by only nonlinear control inputs, and the second is done linear and nonlinear input. And, we investigated their performance using such controllers with numerical simulations and experiments. Consequently, we explain design methods and control system design constraints, and characteristics for flexible structural control.