Optimal Placement of Multi Actuators in Active Control of Building Frames

The optimal placement of the actuator for obtaining the best possible reduction in responses was a topic of interest for researchers. Many optimization techniques were used for obtaining the optimal reduction in responses. Placement of more than three actuators in building frame in practice is difficult and cumbersome. As a result, number of actuators to be placed in the frame is generally restricted as three. For optimization problem, involving three actuators, many computational problems are involved, namely, numerical stability, convergence of the solution, possibility of dynamic instability and in some cases, amplification of some response quantities. The above problems are generally encountered in many standard optimization techniques which are used for optimization. Further, some constraints may have to be imposed in the algorithm for floors where actuators cannot be placed for practical reasons. Under such circumstances, optimal placement of actuator is best achieved using the trial or iterative method.