Abstract

Fuzzy logic can be used advantageously in autonomous orbital operations that require the capability of handling imprecise measurements from sensors. Several applications are under way at the Software Technology Laboratory, NASA/Johnson Space Center to investigate fuzzy logic approaches and develop guidance and control algorithms for autonomous orbital operations. Translational as well as rotational control of a spacecraft have been demonstrated using space shuttle simulations. An approach to a camera tracking system has been developed to support proximity operations and traffic management around space station Freedom. Pattern recognition and object identification algorithms currently under development will become part of this camera system at an appropriate level in the future. A concept to control environment and life support systems for large lunar-based crew quarters is also under development. Investigations in the area of reinforcement learning, utilizing neural networks combined with a fuzzy logic controller, are planned as a joint project with Ames Research Center.

Author Keywords: autonomous orbital operations; fuzzy logic control; sensor fusion

Article Outline

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Corresponding author. Address correspondence to Robert N. Lea, Software Technology Branch/PT4, NASA/Johnson Space Center, Houston, TX.