NASA NTRS · 19910000455
Software For Multivariable Frequency-Domain Analysis
Abstract
FREQ (Multivariable Frequency Domain Singular Value Analysis Package) software package of subroutines performing frequency-domain analysis of: continuous- or discrete-multivariable linear systems; any continuous system for which one calculates transfer matrix at points on imaginary axis; or any discrete system for which one calculates transfer matrix at points on unit circle. Four different versions available. Single-precision brief version LAR-14119, single-precision complete version LAR-14120, double-precision brief version LAR-14121, and double-precision complete version LAR-14122. Written in ANSI standard FORTRAN 77.
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Armstrong, Ernest S., Giesy, Daniel P.. 1991-09-01. Software For Multivariable Frequency-Domain Analysis. https://ntrs.nasa.gov/citations/19910000455
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