Control Mechanism Research of the Feedforward Active Control System by Using Intensity Map

In the case of the feedback control system, the control mechanism can be easily confirmed through the emission of the intensity from the disturbance and the convergence of the intensity where the control force acts as in the source-sink relationship. In the feedforward control system, on the other hand, the intensities interact with the intensity vectors generated by the two forces. So, it is not easy to catch the control mechanism as simple as the feedback system. In this study, to analyze the effect and mechanism of the controller in the feedforward system, a controller that minimizes various types of power is applied to the plate. And the change in the intensity map before and after the control was confirmed. The controller used in the analysis is a controller that minimizes the kinetic energy of the plate, controller that minimizes the sound power radiated from the plate, and a controller that minimizes the input power of the plate. In addition, we analyzed the contribution and influence of each component generating the intensity element, the intensity vector of the external force and the control force, and the effect of each element on the control.