1207 圧電フィルムを用いた柔軟構造物のモード別アクティブ振動制御

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This paper presents the design of piezoelectric film actuators/sensors which can control each mode freely and separately and the active modal vibration control method of a flexible cantilever beam. At first, the equations of motion and the sensor equations of a flexible structure with piezoelectric film actuators/sensors in modal space are derived, and the state-space model is developed. The new piezoelectric film actuators/sensors design is proposed. A piezoelectric film actuator/sensor is shaped into the second derivative of a eigenfunction in order to control the target vibration mode. Secondly, we design a control system using the Linear-Quadratic Regulator (LQR). Finally, the proposed method is applied to the active modal vibration control of a flexible structure. The simulation and experiment are conducted. The system responses to an impulse disturbance with and without control are given, and it is confirmed that the system behavior is enhanced with control. As a result, the active modal vibration control method of a flexible structure is developed.
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