Active-passive composite tuned mass

The time delay between the beginning of a dynamic response and the counteraction of TMD is one of the most important topics in structural control (passive and active) from an engineering point of view. Therefore, Koshika et al. [193] have proposed an active-passive composite tuned mass damper (APTMD). The feasibility and the practicability of the theory was confirmed by demonstrating its control effect using an experimental model, as Fig. 8.50 shows. 

Koshika, N. et al. Research, development and application of active-passive composite tuned mass dampers. Proc. 4th Int. Conf. on Adaptive Structures, Technomic (1993)... 

Fukushima, I., Kobori, T, Sakamoto, M., Koshika, N.,Nishimura, I., Sasaki, K. (1996, September). Vibration control of a tall building using active-passive composite tuned mass damper. Paper presented atthe Third International Conference on Motion and Vibration Control, 1-6, Chiba, Japan. 

Hybrid control refers either to a combination of passive and active systems or, more commonly, to a combination of passive with semi-active systems, aiming at lowering the forces required by active or semi-active systems, respectively. One such device is the hybrid mass damper (HMD), which combines tuned mass dampers with active actuators. The actuator force is mily used to increase efficiency and robustness to changes in structural dynamic characteristics. Also in the category of hybrid mass dampers is the active-passive composite tuned mass damper (APTMD) developed by Ohrui et al. (1994) and named DUOX. This device is composed of an active mass damper mounted on a timed mass damper. Fig. 8. During structural motion, the mass of the AMD is driven in the opposite direction of the TMD, therefore magnifying the motion of the passive device. When the building... 

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