NTRS - NASA Technical Reports Server

Back to Results
Comparison of the STI NIPIP tracking dynamics identification with the on-line Fourier analyzer DFA results including a time varying caseThe Non-Intrusive Pilot Identification Procedure (NIPIP) recently developed at STI and described at the 1981 Annual Manual was used to identify operators who were compensatory tracking a sub-critical-instability task. NIPIP uses a time domain least squares procedure converting to frequency domain coefficients. The forcing function was a sum of sinusoids supplied by the STI Mark II Describing Function Analyzer, which computes on-line Fourier coefficients of the operator's error/input describing function. The resulting open-loop and operator dynamics computed by each procedure are compared, and they are shown to be reasonably close when there is reasonable power in the error signal at the measurement frequencies. A special run was made in which the operator abruptly reduced gain within 1 sec, and the ability of the NIPIP to identify this step time variation in the operator is illustrated.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Jex, H. R.
(Systems Technology, Inc. Hawthorne, CA, United States)
Hanson, G.
(Systems Technology, Inc. Hawthorne, CA, United States)
Date Acquired
August 12, 2013
Publication Date
May 1, 1986
Publication Information
Publication: NASA. Ames Research Center, 21st Annual Conference on Manual Control
Subject Category
Man/System Technology And Life Support
Accession Number
Funding Number(s)
CONTRACT_GRANT: F33615-82-C-0629
Distribution Limits
Work of the US Gov. Public Use Permitted.
No Preview Available