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Improved Nystrom IntegratorsNew formulation for Nystrom integrators offers increased precision and speed of computation. Formulation takes advantage of capabilities of modern electronic computers. Independent and dependent variables and various partial and total derivatives expressed via compact tensor notation. In this approach, typical set of constraint equations derived in about 1 day. Solution of constraint equations speeded by SEARCH computer program. Is general-purpose optimization program, which maximizes or minimizes cost function defined by user. Used successfully, to make least-squares fit of about 4,000 equations in 12 unknowns.
Document ID
19930000735
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Lear, William M. (Charles Stark Draper Laboratory, Inc.)
Date Acquired
August 16, 2013
Publication Date
November 1, 1993
Publication Information
Publication: NASA Tech Briefs
Volume: 17
Issue: 11
ISSN: 0145-319X
Subject Category
Mathematics And Information Sciences
Report/Patent Number
MSC-21790
Accession Number
93B10735
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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