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Phys Rev E Stat Nonlin Soft Matter Phys. 2001 Apr;63(4 Pt 2):046204. Epub 2001 Mar 22.

Restricted feedback control of one-dimensional maps.

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  • 1Entelos, Inc., Menlo Park, CA 94025, USA.


Dynamical control of biological systems is often restricted by the practical constraint of unidirectional parameter perturbations. We show that such a restriction introduces surprising complexity to the stability of one-dimensional map systems and can actually improve controllability. We present experimental cardiac control results that support these analyses. Finally, we develop new control algorithms that exploit the structure of the restricted-control stability zones to automatically adapt the control feedback parameter and thereby achieve improved robustness to noise and drifting system parameters.

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