Method and apparatus for pseudoperiodic drive
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsLouis L. Pecora, Thomas L. Carroll
Life of this patent
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Abstract
A controller is provided for driving at least two systems in synchronization with one another. The controller provides a pseudoperiodic drive to drive the two systems at a desired frequency and to ensure that the two systems are synchronized. The pseudoperiodic drive can be produced by combining a periodic drive with a chaotic drive, noise drive or an incommensurate frequency drive. Any of these types of drives can be combined with the periodic drive by adding to or modulating the periodic drive. Thus, the controller can drive the two systems in phase with one another by using the same pseudoperiodic drive.
Claims28
A controller for driving in synchronization at least two response systems, said controller comprising:
- (a) combining means responsive to a periodic signal and to a perturbing-signal for producing a pseudoperiodic drive signal different from the periodic signal and different from the perturbing signal;
- (b) a stable periodic drive source coupled to said combining means (a) for producing a stable periodic signal of a first frequency, the periodic signal having a periodically repeating waveform, and for applying the periodic signal only to said combining means (a);
- (c) a perturbing drive source coupled to said combining means (a) for producing a perturbing signal and for applying the perturbing signal to said combining means (a). said perturbing drive source being unresponsive to the periodic signal produced by said periodic drive source (b);
- and
- (d) means coupled to said combining means (a) for providing the pseudoperiodic drive signal to the at least two response systems so as to synchronize the at least two response systems with one another.
A method for driving in synchronization at least two response systems, said method comprising the steps of:
- (a) combining a periodic signal with a perturbing signal to produce a pseudoperiodic drive signal different from the periodic signal and different from the perturbing signal;
- (b) stably producing a stable periodic signal of a first frequency, the periodic signal having a periodically repeating waveform and being for use only by said combining step (a);
- (c) producing a perturbing signal for use by said combining step (a), said perturbing signal producing step being unresponsive to the periodic signal produced by said periodic signal producing step (b);
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- (d) providing the pseudoperiodic signal to the at least two response systems so as to synchronize the at least two response systems with one another.
A controller for driving in synchronization at least two response systems, said controller comprising:
- (a) combining means responsive to a periodic signal and to a perturbing signal for producing a pseudoperiodic drive signal;
- (b) a periodic drive source coupled to said combining means (a) for producing a periodic signal and for applying the periodic signal only to said combining means (a);
- (c) a perturbing drive source coupled to said combining means (a) for producing a perturbing signal and for applying the perturbing signal to said combining means (a), said perturbing drive source being unresponsive to the periodic signal produced by said periodic drive source (b);
- and
- (d) means coupled to said combining means (a) for providing the pseudoperiodic drive signal to the at least two response systems so as to synchronize the at least two response systems with one another.
Dependencies are inferred from the claim text.