Auxiliary mass damper

As in most technical fields, actuators are increasingly designed with the help of computers. The actuator and its surrounding are simulated as a mathematical model by means of commercially available software. Such models are fundamental for the simulation of the system response characteristic in each specific case. In this way, it is possible to find out about all the important properties of the system even before the actuator is built, and the actuators relevant parameters can be optimized to achieve the desired values. This designing strategy is exemplified below with an auxiliary mass damper which is able to withdraw kinetic energy from a host vibrating system. 

AVC for pinverirain applications e.g.active auxiliary mass actuator, active mounts, active torsional vibration damper... 

Tamura [194] shows several popular mechanisms of active vibration control systems for civil engineering structures. Mass damper systems, which use the inertia force of the auxiliary mass as the reaction force, are most commonly adopted. They need only a small space for installation and they can suppress the response of tall buildings very effectively during strong winds. 

An example of an active system is described in Figure l.The figure shows a mass damper where Ihe connection with the main frame incorporates apowered actuator able to accelerate the auxiliary mass. Horizontal displacements and accelerations in the main structure are measured by sensors (dashed box) and this information goes (dashed arrows) to Ihe actuator, so governing its operation by means of a controller. Such systems are usually known as active mass dampers. 

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