Neurocontrolled adaptive process control system
First Claim
1. Adaptive vibration control apparatus comprising:
- (1) source sensing means for sensing source vibrations in a given medium;
(2) error sensing means for sensing vibrations at a specified monitoring point in the medium whereat vibrations are to be controlled;
(3) vibration generating means for generating at least one offsetting vibration that is applied to the medium at at least one location; and
(4) controller means responsive to the source vibrations sensed by the source sensing means and to the vibrations at the specified monitoring point sensed by the error sensing means for controlling the vibration generating means in real time so as to force the vibrations sensed by the error sensing means below a first level, said controller means comprising an artificial neural network, said artificial neural network having;
an input layer of a plurality of neurons to which time sequences of an input signal derived from said source sensing means is applied said input signals propagating forward through said network;
an output layer of at least one neuron providing an output signal for controlling said vibration generating means;
at least one intermediate layer of a plurality of neurons coupled to said input and output layers;
said input, output and at least one intermediate layers being responsive to at least one error signal derived from said error sensing means so as to adapt the amount of coupling that occurs between said input, intermediated said output layers as said input signal propagates therethrough.
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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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Citations
8 Claims
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1. Adaptive vibration control apparatus comprising:
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(1) source sensing means for sensing source vibrations in a given medium; (2) error sensing means for sensing vibrations at a specified monitoring point in the medium whereat vibrations are to be controlled; (3) vibration generating means for generating at least one offsetting vibration that is applied to the medium at at least one location; and (4) controller means responsive to the source vibrations sensed by the source sensing means and to the vibrations at the specified monitoring point sensed by the error sensing means for controlling the vibration generating means in real time so as to force the vibrations sensed by the error sensing means below a first level, said controller means comprising an artificial neural network, said artificial neural network having; an input layer of a plurality of neurons to which time sequences of an input signal derived from said source sensing means is applied said input signals propagating forward through said network; an output layer of at least one neuron providing an output signal for controlling said vibration generating means; at least one intermediate layer of a plurality of neurons coupled to said input and output layers; said input, output and at least one intermediate layers being responsive to at least one error signal derived from said error sensing means so as to adapt the amount of coupling that occurs between said input, intermediated said output layers as said input signal propagates therethrough. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification