초록 ▼

A method and apparatus for reducing noise across a broadband frequency range transmitted by a vibrating panel by blocking or otherwise opposing increasing non-resonant modes of vibration in the panel. The method and apparatus includes mounting an array of sensors on a surface of the vibrating panel.

A method and apparatus for reducing noise across a broadband frequency range transmitted by a vibrating panel by blocking or otherwise opposing increasing non-resonant modes of vibration in the panel. The method and apparatus includes mounting an array of sensors on a surface of the vibrating panel. The sensors generate an input signal representing the incident vibration in the panel. The input signal is sent to an adaptive controller which generates an output signal. The output signal is essentially equivalent to the input signal but opposing in phase. The output signal is then sent and distributed to an array of actuators which are also mounted to a surface of the vibrating panel. The output signal forces each of the vibrating actuators to vibrate the panel in opposition to the incident vibration in the panel and thus reduce the transmitted noise. Continual readings of the vibration in the panel allows the sensors to update the input signal and thus adjust the vibration of the actuators. This approach requires only a simple adaptive controller to actively control broadband noise transmitted through the panel.

대표청구항 ▼

[ What is claimed is:] [1.] An apparatus for reducing noise transmitted by a vibrating panel, said apparatus comprising:a plurality of generally spaced apart sensors attached to said vibrating panel, each of said sensors comprising a voltage adder and a phase reverser and being adapted for generatin

[ What is claimed is:] [1.] An apparatus for reducing noise transmitted by a vibrating panel, said apparatus comprising:a plurality of generally spaced apart sensors attached to said vibrating panel, each of said sensors comprising a voltage adder and a phase reverser and being adapted for generating an input signal in response to vibrations in said vibrating panel, said input signal having a first amplitude and a first phase;an adaptive controller for receiving each of said input signals and being adapted for generating an output signal having a second amplitude and a second phase; anda plurality of generally spaced apart actuators attached to said vibrating panel, each of said actuators being adapted for receiving at least a portion of said output signal and being movable in response to said output signal.