Effects of Time-Shifted Data on Flight-Determined Stability and Control Derivatives. Technical Report NASA Technical Note TN D-7830, Research Engineering, NASA Dryden Flight Research Center

Steers, Sandra Thornberry and Iliff, Kenneth W. (1975) Effects of Time-Shifted Data on Flight-Determined Stability and Control Derivatives. Technical Report NASA Technical Note TN D-7830, Research Engineering, NASA Dryden Flight Research Center.

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Abstract

Flight data from five aircraft were shifted in time by various increments to assess the effects of time shifts on estimates of stability and control derivatives produced by a maximum likelihood estimation method. Derivatives could be extracted from flight data with the maximum likelihood estimation method even if there was a considerable time shift in the data. Time shifts degraded the estimates of the derivatives, but the degradation was in a consistent rather than a random pattern. Time shifts in the control variables caused the most degradation, and the lateral-directional rotary derivatives were affected the most by time shifts in any variable.

EPrint Type:	Other
Keywords:	Parameter estimation, Stability and control derivatives, Time-shifted data
Subjects:	Aircraft/Project: F-8 Aircraft/Project: M2-F3 (01 - 09) Aeronautics: (08) Aircraft Stability And Control Aircraft/Project: F-111 Aircraft/Project: C-140 JetStar
ID Code:	712
Deposited On:	14 Febuary 2006
Additional Information:	86 pages.