Lateral Flying Qualities of Highly Augmented Fighter Aircraft

Item

Title
Lateral Flying Qualities of Highly Augmented Fighter Aircraft
Date
1982
Index Abstract
Coming Soon
Photo Quality
Complete
Report Number
AFWAL TR 81-3171 Volume 1
Creator
Monagan, Stephen J.
Bailey, Randall E.
Smith, Rogers E.
Corporate Author
Calspan Corporation
Laboratory
Flight Dynamics Laboratory
Extent
84
Identifier
ADA118070
Access Rights
Approved for public release; distribution unlimited
Distribution Classification
1
Contract
F33615-79-C-3618
DoD Project
None Given
DoD Task
None Given
DTIC Record Exists
No
Distribution Change Authority Correspondence
None
Abstract
This in-flight simulation experiment, using the USAF NT-33 variable stability aircraft operated by Calspan, was undertaken to generate later-directional flying qualities data applicable to highly augmented fighter aircraft. In particular, the effects of time delay and prefilter lag in the lateral flight control system were studied for representative Flight Phase Category A and C tasks. The combined effects of those elements as well as the effects of nonlinear command gain and high Dutch roll damping were also evaluated. Tasks included were actual target tracking, air refueling and precision landing as well as special Head-Up Display (HUD) tracking tasks. Results indicated that a properly designed HUD bank angle tracking task is a valid flying qualities evaluation task. Data show that lateral flying qualities are very sensitive to control system time dealy and very short values of roll mode time constant typically result in poor lateral flying qualities. Excellent separation of the data into flying qualities level is achieved for the Category A task data using time domain equivalent systems parameters. An optimum equivalent time constant value of 0.5 sec is indicated by the data; sensitivity to equivalent time delay is a minimum at this value. Volume I contains the body of the report, while Volume II consists of the Appendices.
Report Availability
Full text available
Date Issued
1982-06
Provenance
AFRL/VACA
Type
report
Format
1 online resource
Subject
Fighter aircraft
Flight control systems
Flight simulation
Variable stability aircraft
Augmentation
Jet lag
Roll
Damping
Optimization
Test and evaluation
Comparison
Configurations
Parameters