Neural prosthesis with fuzzy logic control system
AssigneeShriners Hospitals for Children
InventorsRichard Lauer, Brian T. Smith, Randal R. Betz
Life of this patent
Estimating the term…
Abstract
A neural prosthesis for providing a signal indicative of a predicted event from a cycle of events includes a signal-acquisition system for receiving a neural signal, and a fuzzy-logic inference system for receiving, from the signal acquisition system, a signal indicative of a current location within the cycle of events. The fuzzy-logic inference system is configured to predict a successive event in the cycle of events.
Claims20
A neural prosthesis for providing a signal indicative of a predicted event from a cycle of events, the neural prosthesis comprising:
- a signal-acquisition system for receiving a neural signal;
- a first fuzzy-logic inference system for receiving, from the signal acquisition system, a signal indicative of a current location within the cycle of events, the fuzzy-logic inference system being configured to predict a successive event in the cycle of events;
- a supervisory controller for receiving an output of the fuzzy-logic inference system, the supervisory controller including
- a memory for storing data indicative of at least one preceding predicted event in the cycle of events, and
- a comparator to impose constraints on the successive event at least in part on the basis of the preceding predicted event;
- and
- a second fuzzy-logic inference system configured to provide, at least in part on the basis of an output received from the comparator, a signal indicative of a predicted event.
A neural prosthesis for providing a signal predicting a successive gait event, the neural prosthesis comprising:
- a signal-acquisition system for receiving a neural signal;
- a first fuzzy-logic inference system for receiving a signal from the signal acquisition system, the first fuzzy-logic inference system being configured to predict a candidate successive event at least in part on the basis of the signal;
- a supervisory controller for receiving data indicative of the candidate successive event from the first fuzzy-logic inference system, the supervisory controller comprising
- a memory for storing data indicative of a preceding predicted gait event provided by the first fuzzy-logic inference system;
- and
- a comparator to impose constraints on a successive gait event at least in part on the basis of the preceding predicted gait event;
- a stimulus delivery system in communication with the supervisory controller, the stimulus delivery system being configured to generate a stimulating signal at least in part on the basis of the signal indicative of the predicted event;
- and
- a second fuzzy-logic inference system configured to provide, at least in part on the basis of an output received from the comparator, a signal indicative of a predicted event.
In a neural prosthesis, a method for providing a signal indicative of a predicted event from a cycle of events, the method comprising:
- receiving a neural signal indicative of a current location within the cycle of events;
- applying a fuzzy-logic inference algorithm to the neural signal;
- storing data indicative of at least one preceding predicted event in the cycle of events;
- identifying a constraint on the basis of the preceding predicted event;
- imposing the constraint on the successive event;
- receiving an output indicative of the successive event following imposition of the constraint thereon;
- and
- applying an additional fuzzy-logic algorithm to provide a signal indicative of a predicted event.
Dependencies are inferred from the claim text.