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The effects of stability augmentation on the gust response of a STOL aircraft during a curved manual approachThe task of investigating the effect of SAS was formulated as two optimal control problems for stochastic systems: (1) to compute SAS gains with a rate model in the performance index algorithm; and (2) to calculate the pilot gains and system gust response using an optimal pilot model. Both problems were solved to yield reasonable low gains for the pilot and SAS, and the lateral directional mode poles and the longitudinal short period poles could be placed accurately by the model matching algorithm. Of the longitudinal (SAS) poles achieved, the vertical rms path error was least for the unaugmented poles. The lateral rms path error was an order of magnitude larger than the vertical error and showed a plus or minus 50 percent variation with SAS. It increased with dutch roll frequency and damping, and it decreased most significantly with increased roll stability. The variation in lateral error with bank angle for curved flight was also a significant function of the augmented poles.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Porter, M. B., Jr.
(Air Force Flight Dynamics Lab. Wright-Patterson AFB, OH, United States)
Swaim, R. L.
(Purdue Univ.)
Date Acquired
August 8, 2013
Publication Date
May 1, 1975
Publication Information
Publication: NASA. Ames Res. Center 11th Ann. Conf. on Manual Control
Subject Category
Man/System Technology And Life Support
Accession Number
Distribution Limits
Work of the US Gov. Public Use Permitted.
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