| 摘要 |
PURPOSE: A system for reducing vibration-noise of a wind power generator is provided to prevent a resident's stress by outputting reflected wave of phase opposite to the vibration noise wave of the wind power generator and reducing the noise-wave. CONSTITUTION: A system for reducing vibration-noise of a wind power generator comprises a measurement sensor, a filtering unit, a control unit, a main amplification unit and an output unit. The measuring sensor detects vibration-noise. The filtering unit extracts only a random frequency band of the vibration-noise detected by the measurement sensor. The control unit creates the reflected wave of an phase opposite on the phase of the frequency band extracted from the filtering unit. The main amplification unit amplifies the reflected wave created from the control unit. The output unit outputs the reflected wave amplified in the main amplification unit. |
