Minimization of acoustic potential energy in enclosure using both active noise control and active vibration control

Minimization of acoustic potential energy in an enclosure using both active noise control (ANC) and active vibration control (AVC) is considered, the optimal feedforward control law for minimizing the acoustic potential energy in a cavity walled by flexible planar structures being derived. It is found that the control acoustic power radiated from each acoustic secondary source used for ANC, and control vibration power infused by each control actuator for AVC become zero under the optimal control condition. It is also found that zero power phenomena are the necessary conditions for the optimality. Finally, the control effects for minimizing the potential energy using ANC and AVC are demonstrated from a viewpoint of numerical analysis.