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DYGABCD: A program for calculating linear A, B, C, and D matrices from a nonlinear dynamic engine simulationA digital computer program, DYGABCD, was developed that generates linearized, dynamic models of simulated turbofan and turbojet engines. DYGABCD is based on an earlier computer program, DYNGEN, that is capable of calculating simulated nonlinear steady-state and transient performance of one- and two-spool turbojet engines or two- and three-spool turbofan engines. Most control design techniques require linear system descriptions. For multiple-input/multiple-output systems such as turbine engines, state space matrix descriptions of the system are often desirable. DYGABCD computes the state space matrices commonly referred to as the A, B, C, and D matrices required for a linear system description. The report discusses the analytical approach and provides a users manual, FORTRAN listings, and a sample case.
Document ID
19780025167
Acquisition Source
Legacy CDMS
Document Type
Technical Publication (TP)
Authors
Geyser, L. C.
(NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 3, 2013
Publication Date
September 1, 1978
Subject Category
Aircraft Propulsion And Power
Report/Patent Number
NASA-TP-1295
E-9464
Accession Number
78N33110
Funding Number(s)
PROJECT: RTOP 505-05
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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