Issue 10 Volume 41 May 16, 2003

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AIRCRAFT DESIGN, TESTING AND PERFORMANCE
Includes all stages of design of aircraft and aircraft structures and systems. Also includes aircraft testing, performance, and evaluation,
and aircraft and flight simulation technology. For related information see also 18 Spacecraft Design, Testing and Performance; and 39
Structural Mechanics. For land transportation vehicles see 85 Technology Utilization and Surface Transportation.
20030032372 Air Force Flight Test Center, Edwards AFB, CA
A Comparison of Nonlinear Algorithms in the Prevention of Pilot-Induced Oscillations Caused by Actuator Rate
Limiting (Project HAVE PREVENT)
Hanley, James; Ritter, Stefan; Gloystein, John; Griffiths, George, Jr.; Luker, JOel; Dec. 2002; ISBN0309084997; 58 pp.; In
English; Original contains color illustrations
Report No.(s): AD-A410173; AFFTC-TIM-02-07; No Copyright; Avail: CASI; A04, Hardcopy
This report presents the results of Project HAVE PREVENT, a comparison of nonlinear algorithms in the prevention of
pilot-induced oscillations (PIO) caused by actuator rate limiting. The overall test objective was to compare the ability of two
flight control system filters in the prevention of PIO during actuator rate limiting. The Air Force Institute of Technology,
Engineering Department (AFIT/ENY) requested this testing. The USAF Test Pilot School (TPS), Class O2A, conducted 13
flight tests totaling 21.0 hours at Edwards AFB, California, from 16 to 23 October 2002.
DTIC
Pilot Induced Oscillation; Flight Control; Actuators; Algorithms
20030032381 Army Research Lab., Adelphi, MD
Acoustic Data Collection of Tactical Unmanned Air Vehicles (TUAVs)
Pham, Tien; Sim, Leng; Dec. 2002; ISBN0309084997; 47 pp.; In English; Original contains color illustrations
Report No.(s): AD-A410088; ARL-TR-2749; No Copyright; Avail: CASI; A03, Hardcopy
This report discusses the data collection experiments of tactical unmanned air vehicles (TUAVs) conducted by the U.S.
Army Research Laboratory of Webster Airfield, Patuxent River, MD in October 2001 and January 2002. The purpose of these
data collection experiments was to collect raw acoustic signatures of TUAVs and to develop an acoustic database to support
activities of the Action Group 6 (AG6) under the Technical Cooperative Program. The AG6’s main objectives are to improve
the understanding and utilization of acoustic sensor technology and to evaluate acoustic sensor performance in the detection,
tracking, and classification of TUAVs.
DTIC
Data Acquisition; Drone Aircraft; Acoustics
20030032479 Sest, Inc., Middleburgh Heights, OH, USA
Enhancement/Upgrade of Engine Structures Technology Best Estimator (EST/BEST) Software System
Shah, Ashwin; Chamis, Christos C., Technical Monitor; March 2003; 64 pp.; In English; Original contains color illustrations
Contract(s)/Grant(s): NASA Order C-76751-J; WBS-22-708-90-53
Report No.(s): NASA/CR-2003-212126; NAS 1.26:212126; E-13778; No Copyright; Avail: CASI; A04, Hardcopy
This report describes the work performed during the contract period and the capabilities included in the EST/BEST
software system. The developed EST/BEST software system includes the integrated NESSUS, IPACS, COBSTRAN, and
ALCCA computer codes required to perform the engine cycle mission and component structural analysis. Also, the interactive
input generator for NESSUS, IPACS, and COBSTRAN computer codes have been developed and integrated with the
EST/BEST software system. The input generator allows the user to create input from scratch as well as edit existing input files
interactively. Since it has been integrated with the EST/BEST software system, it enables the user to modify EST/BEST
generated files and perform the analysis to evaluate the benefits. Appendix A gives details of how to use the newly added
features in the EST/BEST software system.
Author
Computer Systems Programs; Software Engineering; Computer Programming; Aerodynamics; Structural Analysis; Engine
Tests
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