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Control system design using frequency domain models and parameter optimization, with application to supersonic inlet controlsA technique is described for designing feedback control systems using frequency domain models, a quadratic cost function, and a parameter optimization computer program. FORTRAN listings for the computer program are included. The approach is applied to the design of shock position controllers for a supersonic inlet. Deterministic or random system disturbances, and the presence of random measurement noise are considered. The cost function minimization is formulated in the time domain, but the problem solution is obtained using a frequency domain system description. A scaled and constrained conjugate gradient algorithm is used for the minimization. The approach to a supersonic inlet included the calculations of the optimal proportional-plus integral (PI) and proportional-plus-integral-plus-derivative controllers. A single-loop PI controller was the most desirable of the designs considered.
Document ID
19740026518
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Seidel, R. C. (NASA Lewis Research Center Cleveland, OH, United States)
Lehtinen, B. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 3, 2013
Publication Date
October 1, 1974
Subject Category
Computers
Report/Patent Number
NASA-TM-X-3108
E-7710
Accession Number
74N34631
Funding Number(s)
PROJECT: RTOP 501-24
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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