104 Vibration Control of A Structure with An Active Dynamic Vibration Absorber Involving Actuator Constraints : Experimental Verification for Multi-Degree-of-Freedom Structure

Abstract

This paper proposes a design method for vibration control of a multi-degree-of-freedom structure with an active dynamic vibration absorber involving actuator constraints. The linear parameter varying system is formulated taking account of both the maximum control input and the maximum stroke of the actuator by using a nonlinear function of hyperbolic tangent. The gain-scheduled control based on the linear matrix inequality is obtained so that the closed-loop system is stable and has good performance even if saturation phenomena of the actuator occur. The effectiveness of our proposed method is verified by experiments conparing the performance with that of an H_∞ fixed controller.