Method and apparatus for controlling vibration

Details Method and apparatus for controlling vibration Method and apparatus for controlling vibration

1993-12-15

1997-03-18

Coles, Sr., Edward L.

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

Adjacent ear

381 94, A61F 1106, H04B 1500

Patent

active

056130090

ABSTRACT:
Disclosed is a vibration control method being largely effective in vibration-proof even when a natural frequency is relatively low and its transmissibility of vibration is high and being thus effective in reducing vibration in a wide range of frequencies; and its apparatus. In the above method, vibration information of a vibration source as a reference signal and vibration information of a vibration-proof object as an error signal are inputted into an adaptive filter. The reference signal is processed by regenerating a filter coefficient on the basis of adaptive algorithm, to form a feedforward signal. In the other hand, vibration information of the vibration-proof object is inputted in a feedback calculating means, and a feedback control signal is formed on the basis of a feedback control rule. The feedforward control signal and the feedback control signal are synthesized, to form a drive signal for a vibration exciting means. The vibration exciting means is thus controlled and driven on the basis of the drive signal.

REFERENCES:
patent: 4677677 (1987-06-01), Eriksson
patent: 5018202 (1991-05-01), Takahashi et al.
patent: 5337366 (1994-08-01), Eguchi et al.
The Cancellation of Repetitive Noise and Vibration; Barrie Chaplin; 12-80; p. 182.
The Application of Self-Tuning Control Strategies to the Active Reduction of Sound.

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