How does an active seismic response control system work?

The active control systems of the seismic response, already widely used in Asia, allow at the same time to improve the dynamic performance of the building and to monitor the structure 24 hours a day. The active anti-seismic systems in fact guarantee the maximum seismic protection to buildings, transforming a structure into a real Smart structure.
Every day, when we walk, our body is able to maintain balance thanks to the unconscious measurement of certain parameters, such as the inclination through the auricular labyrinth. All this is possible thanks to the brain that measures parameters and controls the movement of the body. The human body is in fact the perfect example of an active control system.

What are the components of an active anti-seismic system?

An active control system requires the use of actuators to exert strength, sensors to measure parameters and a ticket inspector in which the control algorithm can be implemented, which is in effect comparable to the brain of the machine.
In the same way that the human body allows to maintain balance, the active control system of the seismic response requires:

  1. The installation of actuators on the roof of the building, to exert control forces on the building.
  2. Sensors positioned at certain points, to measure the movement of the structure.
  3. The central control computer, where the control algorithm is implemented to allow active monitoring of the building.

During the earthquake the sensors measure the movement of the building, while the central control computer imposes the generation of forces by each of the devices installed on the roof, in order to minimize the displacements of the floors, the inter-floor drifts and consequently the efforts to the structural elements.

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