能動騒音制御および能動振動制御による振動放射音響パワーの最小化

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  • Minimization of the Acoustic Power Radiated from a Vibrating Panel Using Both Active Noise Control and Active Vibration Control.
  • ノウドウ ソウオン セイギョ オヨビ ノウドウ シンドウ セイギョ ニ ヨル シンドウ ホウシャ オンキョウ パワー ノ サイショウカ

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This paper concerns the minimization of total acoustic power radiated from a vibrating panel using both active noise and vibration control approaches. This paper begins by deriving the optimal feedforward control law for minimizing the total acoustic power radiated from a vibrating panel:three kinds of control strategies for minimizing the total acoustic power are presented in the work. It is found that acoustic control power at every secondary source location always becomes zero under the optimal control condition. It is also found that the vibration control power at each control location becomes zero under the optimal control condition. The fact that the control power for both acoustic and vibration stance becomes zero turns out to be a necessary condition for the optimalicy. Using the acoustic intensity distribution as well as the vibration intensity distribution, these phenomena are investigated. Finally, control effects for minimizing the total acoustic power for two casesuse of a single acoustic secondary source and a single vibration controller, and use of four acoustic secondary sources and a single vibration controller-are shown.

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