New Approach for Active Control of Smart Structure Using Multi Actuators and Sensors

In this paper a new approach is presented for controlling the structural vibrations. The proposed active control method is based on structural dynamics theories in which multi actuators and sensors are utilized. Each actuator force is modeled as an equivalent viscous damper so that several lower vibration modes are damped critically. This subject is achieved by simple mathematical formulation. The proposed method does not depend on the type of dynamic load and it could be applied to control structures with multi degrees of freedom. For numerical verification of proposed method, several criterions such as maximum displacement, maximum kinetic energy and maximum drift are evaluated in five story shear building, excited by harmonic load. This study shows that the proposed method has suitable efficiency for reducing structural vibrations. Also, according to the results, the maximum shift in the structure of the upper floors 5 degrees of freedom are reduced by 75%