A Nonlinear Internal Feedback Model for the Pupil Control System,

Abstract

The human pupillary control system is a typical biological control system and exhibits a series of interesting nonlinear behaviors, particularly asymmetry, pupillary escape, and pupillary capture. A fairly simple nonlinear model is presented in which a signal statically proportional to pupil size is fed back internally to cause a change in system parameters related to gains and rates of light adaptation. The model was simulated on a digital computer, improvements over previous pupil models demonstrated, and a variety of experimental data as well matched. Candidate physiological mechanisms for the components of the model are discussed.

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1983
Accession Number
ADP001617

Entities

People

  • Fuchuan Sun
  • Lawrence W. Stark
  • William C. Krenz

Organizations

  • University of California, Berkeley

Tags

DTIC Thesaurus Topics

  • Asymmetry
  • Closed Loop Systems
  • Computers
  • Computing Devices
  • Control Systems
  • Digital Computers
  • Experimental Data
  • Feedback
  • Human Factors Engineering
  • Nonlinear Dynamics

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