Active noise and vibration control system

Details Active noise and vibration control system Active noise and vibration control system

1996-08-15

1998-09-01

Chang, Vivian

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

Within cabin or compartment of vehicle

381 86, 381 711, A61F 1106

Patent

active

058021841

ABSTRACT:
Vibrational energy in a first frequency range within a vehicle or the like is controlled by an active vibration control system which includes a sensor, controller, driver, actuator and actuator power dissipation reduction circuit. The controller provides a control signal to a Class-D power amplifier operating at a second higher frequency to generate an output signal to the actuator in the frequency range of the noise/vibration to be controlled resulting in a force output from the actuator controlling vibration and/or noise in a passenger compartment of the vehicle. The actuator power dissipation reduction circuit reduces high frequency energy transients with in-series inductors to prevent heat inducing eddy currents in the actuator without additional current flow in the power amplifier.

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Swanson, D.A. and Miller, L.R., Design and Effectiveness Evaluation of an Active Vibration Isolation System for a Commercial Jet Aircraft, Lord Library of Technical Articles LL-6003 (1994).
Harris Application Note 9404, No. 5174, p. 3, Apr. 1994.

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