Model reference adaptive system for the noise control of an active piezoelectric acoustic box

The paper shows the procedure for design based on the model reference adaptive control system for the noise reduction shown by the example of the acoustic box. Besides the controller design, the paper points out the possibility of modeling using the FEM (finite element method) approach, which represents a suitable basis for the controller development, simulation and testing. The MRAC (model reference adaptive control) system relies on the FEM-based model used also for the reference model determining, where the desired output of the reference model follows the output of the controlled plant with LQ (linear quadratic) controller. This approach allows at the same time the comparison of the two control approaches, showing in this case the advantage of the MRAC over the LQ control system. The simulation results show the reduction of the acoustic fluid pressure at the preselected point of the acoustic cavity influenced by the MRAC control input brought to the actuator patch. The example shows the possibility of using the MRAC control system for the active structural acoustic control. Entnommen aus <a_href="http://www.fiz-technik.de/db/b_tema.htm" target="_blank">TEMA</a>