NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
PIFCGT: A PIF autopilot design program for general aviation aircraftThis report documents the PIFCGT computer program. In FORTRAN, PIFCGT is a computer design aid for determing Proportional-Integral-Filter (PIF) control laws for aircraft autopilots implemented with a Command Generator Tracker (CGT). The program uses Linear-Quadratic-Regulator synthesis algorithms to determine feedback gains, and includes software to solve the feedforward matrix equation which is useful in determining the command generator tracker feedforward gains. The program accepts aerodynamic stability derivatives and computes the corresponding aerodynamic linear model. The nine autopilot modes that can be designed include four maneuver modes (ROLL SEL, PITCH SEL, HDG SEL, ALT SEL), four final approach models (APR GS, APR LOCI, APR LOCR, APR LOCP), and a BETA HOLD mode. The program has been compiled and executed on a CDC computer.
Document ID
19860005850
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Broussard, J. R.
(Information and Control Systems, Inc. Hampton, VA, United States)
Date Acquired
September 5, 2013
Publication Date
December 1, 1983
Subject Category
Aircraft Stability And Control
Report/Patent Number
NAS 1.26:166123
NASA-CR-166123
TR-681103
Accession Number
86N15320
Funding Number(s)
CONTRACT_GRANT: NAS1-16303
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
No Preview Available