Vibration/noise control system for vehicles

Details Vibration/noise control system for vehicles Vibration/noise control system for vehicles

1993-03-11

1995-01-31

Voeltz, Emanuel T.

Boots, shoes, and leggings

364581, G01K 1116

Patent

active

053863720

ABSTRACT:
A plurality of pulse signals (trigger signals) responsive to driving of a power plant are directly supplied to respective adaptive control circuits each having an adaptive digital filter for controlling components of periodic or semi-periodic vibrations and noises ascribed to related component parts of a vibration
oise source. Further, the adaptive control is performed while varying a sampling frequency in response to changes in parameters of operating conditions of the power plant. Optionally, a control signal from the adaptive digital filter is corrected for gain. Further, periodic signal-eliminating means is provided for determining a transfer characteristic of a system to which the adaptive control is applied, based on a residual component signal from the periodic signal-eliminating means, a random signal having a low amplitude level, etc.

REFERENCES:
patent: 4715559 (1987-12-01), Fuller
patent: 4878188 (1989-10-01), Ziegler, Jr.
patent: 5146505 (1992-09-01), Pfaff et al.
patent: 5222148 (1993-06-01), Yuan
Publication entitled "Signal Processing for Active Control", Apr. 9-11, 1991, Author Hareo Hamada; International Symposium on Active Control of Sound and Vibration.

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