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FREQ: A computational package for multivariable system loop-shaping proceduresMany approaches in the field of linear, multivariable time-invariant systems analysis and controller synthesis employ loop-sharing procedures wherein design parameters are chosen to shape frequency-response singular value plots of selected transfer matrices. A software package, FREQ, is documented for computing within on unified framework many of the most used multivariable transfer matrices for both continuous and discrete systems. The matrices are evaluated at user-selected frequency-response values, and singular values against frequency. Example computations are presented to demonstrate the use of the FREQ code.
Document ID
19890019676
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Giesy, Daniel P. (PRC Kentron, Inc., Hampton VA., United States)
Armstrong, Ernest S. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
September 6, 2013
Publication Date
September 1, 1989
Subject Category
Computer Programming And Software
Report/Patent Number
L-16566
NAS 1.15:4127
NASA-TM-4127
Accession Number
89N29047
Funding Number(s)
PROJECT: RTOP 506-46-11-01
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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