The performance representing vibration energy of a system greatly depends on the locations of actuators and sensors. Active controller designed based on a finite dimensional model can seriously degrade the performance due to the residual modes effect, which can lead to the instability problem in a closed-loop system.
In this thesis optimal feedback gain and optimal locations of sensors are experimentally obtained, and a method of suppressing the residual modes effect is experimentally investigated.
The results are compared with theoretical ones obtained from a simply-supported beam model.