Boots – shoes – and leggings
Patent
1990-10-30
1994-11-22
MacDonald, Allen R.
Boots, shoes, and leggings
395903, 36443101, G21C 736
Patent
active
053676122
ABSTRACT:
An adaptive process control system selectively controls vibrations in a given medium in real time. Unwanted vibrations present at a point being monitored in a given medium are sensed, and the system generates an appropriate offsetting vibration that is applied to the medium at a convenient location, which may be remote from the monitored point. The system includes a vibration sensor, such as one or more accelerometers, that sense both input and output vibrations present within the medium; at least one vibration generator, such as an electromagnetic shaker, that generates appropriate offsetting vibrations that are applied to the medium at one or more appropriate locations; and a neural network controller that controls the vibration generator(s) so as to force the sensed vibration at the monitored point(s) to a desired level. The adaptive vibration cancellation provided by the invention takes place in real time, and without the need to process time-consuming complex mathematical algorithms. A specific embodiment of the neural network controller includes a plurality of 4-layer neural networks configured in an adaptive filtered-x configuration.
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Bozich Daniel J.
Eggert Jay A.
MacKay H. Bruce
Muenchau Ernest E.
Davis George
MacDonald Allen R.
Science Applications International Corporation
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