Control Performances Based on Control System Design Strategies for Active Structural Control

An active control system consists of three parts : the vibration system of the controlled object, sensors and actuators, and controllers. Control performance depends on the characteristics of the controllers. Therefore, we discuss control system design strategies and control performance for a typical design method of active structural control in detail. Although there are many control system design methods for active vibration control systems of structural control, we focus attention on a design method using modern and postmodern control theories, which is called robust control theory. We verify the control performances as benchmark problems for LQ control, LQG control, disturbance cancellation control, H2 control, H∞ control, μ control and sliding mode control. In this study, we use two vibration models : the active vibration absorber (AVA) model and the active dynamic vibration absorber (ADVA) model. Finally, we confirm that μ is superior to other control methods for linear structural control, and sliding mode is currently the best method for the nonlinear structural control system compared with other control methods in practical use.

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