Flight Test Identification And Simulation Of A Uh 60a Helicopter And Slung Load

DOWNLOAD

Download Flight Test Identification And Simulation Of A Uh 60a Helicopter And Slung Load PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Flight Test Identification And Simulation Of A Uh 60a Helicopter And Slung Load book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page

Flight Test Identification And Simulation Of A Uh 60a Helicopter And Slung Load

DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2001

Flight Test Identification And Simulation Of A Uh 60a Helicopter And Slung Load written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with categories.

Helicopter slung-load operations are common in both military and civil contexts. Helicopters and loads are often qualified for these operations by means of flight tests, which can be expensive and time consuming. There is significant potential to reduce such costs both through revisions in flight-test methods and by using validated simulation models. To these ends, flight tests were conducted at Moffett Field to demonstrate the identification of key dynamic parameters during flight tests (aircraft stability margins and handling-qualities parameters, and load pendulum stability), and to accumulate a data base for simulation development and validation. The test aircraft was a UH-60A Black Hawk, and the primary test load was an instrumented 8- by 6- by 6-ft cargo container. Tests were focused on the lateral and longitudinal axes, which are the axes most affected by the load pendulum modes in the frequency range of interest for handling qualities; tests were conducted at airspeeds from hover to 80 knots. Using telemetered data, the dynamic parameters were evaluated in near real time after each test airspeed and before clearing the aircraft to the next test point. These computations were completed in under 1 min. A simulation model was implemented by integrating an advanced model of the UH-60A aerodynamics, dynamic equations for the two-body slung-load system, and load static aerodynamics obtained from wind-tunnel measurements. Comparisons with flight data for the helicopter alone and with a slung load showed good overall agreement for all parameters and test points; however, unmodeled secondary dynamic losses around 2 Hz were found in the helicopter model and they resulted in conservative stability margin estimates.

Advances In Guidance Navigation And Control

DOWNLOAD
Author : Liang Yan
language : en
Publisher: Springer Nature
Release Date : 2025-03-06

Advances In Guidance Navigation And Control written by Liang Yan and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2025-03-06 with Technology & Engineering categories.

This book features the latest theoretical results and techniques in the field of guidance, navigation, and control (GNC) of vehicles and aircrafts. It covers a wide range of topics, including but not limited to, intelligent computing communication and control; new methods of navigation, estimation, and tracking; control of multiple moving objects; manned and autonomous unmanned systems; guidance, navigation, and control of miniature aircraft; and sensor systems for guidance, navigation and control, etc. Presenting recent advances in the form of illustrations, tables, and text, it also provides detailed information of a number of the studies, to offer readers insights for their own research. In addition, the book addresses fundamental concepts and studies in the development of GNC, making it a valuable resource for both beginners and researchers wanting to further their understanding of guidance, navigation, and control.

Flight Time Identification Of A Uh 60a Helicopter And Slung Load

DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1998

Flight Time Identification Of A Uh 60a Helicopter And Slung Load written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with categories.

Journal Of The American Helicopter Society

DOWNLOAD
Author : American Helicopter Society
language : en
Publisher:
Release Date : 2001

Journal Of The American Helicopter Society written by American Helicopter Society and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Helicopters categories.

Flight Testing And Real Time System Identification Analysis Of A Uh 60a Black Hawk Helicopter With An Instrumented External Sling Load

DOWNLOAD
Author : Allen H. McCoy
language : en
Publisher:
Release Date : 1997-12

Flight Testing And Real Time System Identification Analysis Of A Uh 60a Black Hawk Helicopter With An Instrumented External Sling Load written by Allen H. McCoy and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997-12 with Science categories.

Historically, helicopter and load combinations have been qualified through flight testing, requiring considerable time and cost. With advancements in simulation and flight test techniques, there is potential to substantially reduce costs and increase the safety of helicopter sling load certification. Validated simulation tools make possible accurate prediction of operational flight characteristics before initial flight tests. Real time analysis of test data improves the safety and efficiency of the testing programs. To advance these concepts, the US Army and NASA, in cooperation with the Israeli Air Force and Technion, under a Memorandum of Agreement, seek to develop and validate a numerical model of the UH-60 with sling load and demonstrate a method of near real time flight test analysis. This thesis presents results from flight tests of a US Army Black Hawk helicopter with various external loads. Tests were conducted as the US first phase of this MOA task. The primary load was a container express box (CONEX), which contained a compact instrumentation package. The flights covered the airspeed range from hover to 70 knots. Primary maneuvers were pitch and roll frequency sweeps, steps, and doublets. Results of the test determined the effect of the suspended load on both the aircraft's handling qualities and it's control system's stability margins. Included were calculations of the stability characteristics of the load's pendular motion. Utilizing CIFER software, a method for near-real time system identification was also demonstrated during the flight test program.

Monthly Catalog Of United States Government Publications

DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1999-07

Monthly Catalog Of United States Government Publications written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999-07 with Government publications categories.

The Aeronautical Journal

DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2004

The Aeronautical Journal written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Aeronautics categories.

International Aerospace Abstracts

DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1999

International Aerospace Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Aeronautics categories.

Flight Research At Ames

DOWNLOAD
Author : Paul F. Borchers
language : en
Publisher:
Release Date : 1999

Flight Research At Ames written by Paul F. Borchers and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Aeronautics categories.

Identification Des Syst Mes Pour Le D Veloppement Int Gr Des A Ronefs Et Les Essais En Vol

DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1999

Identification Des Syst Mes Pour Le D Veloppement Int Gr Des A Ronefs Et Les Essais En Vol written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Airplanes categories.