Aircraft and Rotorcraft System Identification: Engineering Methods with Flight-Test Examples

Acronyms

ACAH

=

attitude command, attitude hold

ADOCS

=

Advanced Digital Optical Control System

AFCS

=

Automatic Flight Control System

AFDD

=

U.S. Army Aeroflightdynamics Directorate (Ames Research Center)

AGARD

=

Advisory Group for Aerospace Research and Development

AIAA

=

American Institute of Aeronautics and Astronautics

ARI

=

aileron-to-rudder interconnect

ASE

=

aeroservoelastic, also automatic stabilization equipment (SH-2G)

CIFER

=

Comprehensive Identification from Frequency Responses software package

COMPOSITE

=

CIFER program that combines multiple spectral windows to achieve a final frequency response

CONDUIT

=

Control Designer's Unified Interface software package

CZT

=

chirp z-transform

DERIVID

=

CIFER program used to identify a state-space model structure that best fits the MIMO frequency-response database

DFT

=

discrete Fourier transform

DLR

=

Deutsche Forshungsanstalt f r Luft- und Raumfahrt (until 1989: DFVLR)

DOF

=

degree(s) of freedom

FCS

=

Flight control system

FFT

=

fast Fourier transform

FRESPID

=

CIFER program that calculates SISO frequency responses using a chirp z-transform (an advanced FFT)

GENHEL

=

Sikorsky general helicopter flight dynamics simulation program

GTR

=

generic tilt-rotor simulation

HQR

=

Cooper-Harper handling-qualities rating

IMU

=

inertial measurement unit

LOES

=

lower-order equivalent system

LTI

=

linear time invariant

MCLAWS

=

modernized control laws

MIL-STD-nnnn

=

military requirements standard

MIMO

=

multiple-input/multiple-output

MISO

=

multiple-input/single-output

MISOSA

=

CIFER program that determines frequency responses when multiple inputs are present

MUAD

=

maximum unnoticeable added dynamics

NASA

=

National Aeronautics and Space Administration (US)

NAVFIT

=

CIFER

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