Host: The Japan Society of Mechanical Engineers
Name : Dynamics and Design Conference 2019
Date : August 27, 2019 - August 30, 2019
In order to realize a vibration suppression of flexible structures like a membrane, we focus on introducing a smart structures technology to the membrane structure. In this study, a vibration control system using a DEA as an actuator for the membrane structure is proposed. A non-contact vibration test system using a high power Nd: YAG pulse laser for producing an ideal impulse excitation and laser Doppler vibrometers for measuring the response on the membrane is used for evaluating the vibration characteristics of the smart membrane structure. DEA is flexible, light and stretchable, and so it is suitable to be installed on the membrane structures as an actuator. Considering applications of DEA as space structures, a vacuum chamber is used in the control experiments. To confirm the effectiveness of the proposed method, the control experiments with H∞ control for reducing multiple modes vibration are conducted in the vacuum chamber. It is verified by this study that the present active control method combined with the passive control mechanism due to DEA’s damping effectively suppresses the vibration responses of the membrane structure in wide frequency range.
