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Fuzzy Control Hardware for Segmented Mirror Phasing AlgorithmThis paper presents a possible implementation of a control model developed to phase a system of segmented mirrors, with a PAMELA configuration, using analog fuzzy hardware. Presently, the model is designed for piston control only, but with the foresight that the parameters of tip and tilt will be integrated eventually. The proposed controller uses analog circuits to exhibit a voltage-mode singleton fuzzifier, a mixed-mode inference engine, and a current-mode defuzzifier. The inference engine exhibits multiplication circuits that perform the algebraic product composition through the use of operational transconductance amplifiers rather than the typical min-max circuits. Additionally, the knowledge base, containing exemplar data gained a priori through simulation, interacts via a digital interface.
Document ID
20020043214
Acquisition Source
Headquarters
Document Type
Other
Authors
Roth, Elizabeth
(Mercer Univ. Macon, GA United States)
Date Acquired
August 20, 2013
Publication Date
October 1, 1999
Publication Information
Publication: 1999 NASA/ASEE Summer Faculty Fellowship Program
Subject Category
Optics
Funding Number(s)
CONTRACT_GRANT: NGT8-52874
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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