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

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Flight Testing and Real-Time System Identification Analysis of a UH-60A Black Hawk Helicopter with an Instrumented External Sling Load

Author : Allen H. McCoy
Publisher :
ISBN 13 :
Total Pages : 96 pages
Book Rating : 4.:/5 (317 download)

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Book Synopsis Flight Testing and Real-Time System Identification Analysis of a UH-60A Black Hawk Helicopter with an Instrumented External Sling Load by : Allen H. McCoy

Download or read book 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 published by . This book was released on 1997-12 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Flight Testing and Real-Time System Identification Analysis of a Uh-60a Black Hawk Helicopter with an Instrumented External Sling Load

Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781722400941
Total Pages : 92 pages
Book Rating : 4.4/5 (9 download)

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Book Synopsis Flight Testing and Real-Time System Identification Analysis of a Uh-60a Black Hawk Helicopter with an Instrumented External Sling Load by : National Aeronautics and Space Administration (NASA)

Download or read book Flight Testing and Real-Time System Identification Analysis of a Uh-60a Black Hawk Helicopter with an Instrumented External Sling Load written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-06 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: Helicopter external air transportation plays an important role in today's world. For both military and civilian helicopters, external sling load operations offer an efficient and expedient method of handling heavy, oversized cargo. With the ability to reach areas otherwise inaccessible by ground transportation, helicopter external load operations are conducted in industries such as logging, construction, and fire fighting, as well as in support of military tactical transport missions. 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 U.S. 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 U.S. Army Black Hawk helicopter with various external loads. Tests were conducted as the U.S. 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 its control system's stability margins. Included were calculations of the stability characteristics of the load's pendular motion. Utilizing CIFER(R) software, a method for near-...

Flight Test Identification and Simulation of a UH-60A Helicopter and Slung Load

Author :
Publisher :
ISBN 13 :
Total Pages : 98 pages
Book Rating : 4.:/5 (317 download)

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Book Synopsis Flight Test Identification and Simulation of a UH-60A Helicopter and Slung Load by :

Download or read book Flight Test Identification and Simulation of a UH-60A Helicopter and Slung Load written by and published by . This book was released on 2001 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Monthly Catalog of United States Government Publications

Author :
Publisher :
ISBN 13 :
Total Pages : 1152 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis Monthly Catalog of United States Government Publications by :

Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1999 with total page 1152 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Flight-Time Identification of a UH-60A Helicopter and Slung Load

Author :
Publisher :
ISBN 13 :
Total Pages : 30 pages
Book Rating : 4.:/5 (317 download)

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Book Synopsis Flight-Time Identification of a UH-60A Helicopter and Slung Load by :

Download or read book Flight-Time Identification of a UH-60A Helicopter and Slung Load written by and published by . This book was released on 1998 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Identification Des Systèmes Pour Le Développement Intégré Des Aéronefs Et Les Essais en Vol

Author :
Publisher :
ISBN 13 :
Total Pages : 418 pages
Book Rating : 4.E/5 ( download)

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Book Synopsis Identification Des Systèmes Pour Le Développement Intégré Des Aéronefs Et Les Essais en Vol by :

Download or read book Identification Des Systèmes Pour Le Développement Intégré Des Aéronefs Et Les Essais en Vol written by and published by . This book was released on 1999 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Journal of the American Helicopter Society

Author : American Helicopter Society
Publisher :
ISBN 13 :
Total Pages : 324 pages
Book Rating : 4.X/5 (6 download)

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Book Synopsis Journal of the American Helicopter Society by : American Helicopter Society

Download or read book Journal of the American Helicopter Society written by American Helicopter Society and published by . This book was released on 2001 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Simulation Validation and Flight Prediction of UH-60A Black Hawk Helicopter/Slung Load Characteristics

Author : Peter H. Tyson
Publisher :
ISBN 13 : 9781423545231
Total Pages : 303 pages
Book Rating : 4.5/5 (452 download)

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Book Synopsis Simulation Validation and Flight Prediction of UH-60A Black Hawk Helicopter/Slung Load Characteristics by : Peter H. Tyson

Download or read book Simulation Validation and Flight Prediction of UH-60A Black Hawk Helicopter/Slung Load Characteristics written by Peter H. Tyson and published by . This book was released on 1999-03-01 with total page 303 pages. Available in PDF, EPUB and Kindle. Book excerpt: Helicopter/slung load systems are two body systems in which the slung load adds its rigid body dynamics, aerodynamics, and sling stretching dynamics to the helicopter. The slung load can degrade helicopter handling qualities and reduce the flight envelope of the helicopter. Confirmation of system stability parameters and envelope is desired, but flight test evaluation is time consuming and costly. A simulation model validated for handling quality assessments would significantly reduce resources expended in flight testing while increasing efficiency, productivity, and safety by aiding researchers, designers, and pilots to understand factors affecting helicopter-slung load handling qualities. This thesis describes a comprehensive dynamics and aerodynamics model for slung load simulation, obtained by integrating the NASA Ames Gen Hel UH-60A simulation with slung load equations of motion. Frequency domain analysis is used to compare simulation to flight test frequency responses and key system stability parameters. Results are given for no load, a 4K lb Block, and a 4K lb CONEX load. Handling quality parameters, stability margins, and load pendulum motion roots for cases without load aerodynamics and with static wind tunnel data were compared. Results illustrated state-of-the-art simulation modeling of helicopter/slung load dynamics and its accuracy in predicting key dynamic parameters of interest.

Aircraft and Rotorcraft System Identification

Author : Mark Brian Tischler
Publisher : AIAA Education
ISBN 13 : 9781600868207
Total Pages : 0 pages
Book Rating : 4.8/5 (682 download)

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Book Synopsis Aircraft and Rotorcraft System Identification by : Mark Brian Tischler

Download or read book Aircraft and Rotorcraft System Identification written by Mark Brian Tischler and published by AIAA Education. This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although many books have been written on the theory of system identification, few are available that provide a complete engineering treatment of system identification and how to successfully apply it to flight vehicles. This book presents proven methods, practical guidelines, and real-world flight-test results for a wide range of state-of-the-art flight vehicles, from small uncrewed aerial vehicles (UAVs) to large manned aircraft/rotorcraft.

Maintenance Test Flight Manual

Author :
Publisher :
ISBN 13 :
Total Pages : 42 pages
Book Rating : 4.X/5 (4 download)

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Book Synopsis Maintenance Test Flight Manual by :

Download or read book Maintenance Test Flight Manual written by and published by . This book was released on 1990 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Uh-60 Black Hawk Pilot's Flight Operating Manual

Author : Department of the Army
Publisher : Periscope Film LLC
ISBN 13 : 9781935700616
Total Pages : 586 pages
Book Rating : 4.7/5 (6 download)

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Book Synopsis Uh-60 Black Hawk Pilot's Flight Operating Manual by : Department of the Army

Download or read book Uh-60 Black Hawk Pilot's Flight Operating Manual written by Department of the Army and published by Periscope Film LLC. This book was released on 2011-04 with total page 586 pages. Available in PDF, EPUB and Kindle. Book excerpt: Developed to replace the UH-1 Iroquis, Sikorsky s UH-60 Black Hawk first entered service in 1979. A four-blade, twin-engine, medium-lift utility helicopter, the UH-60 serves as the U.S. Army s primary tactical transport helicopter. Modified versions include models for the U.S. Navy and Air Force, and specialized versions including the UH-60C (modified for Command and Control missions), EH-60A (electronic systems operations and electronic warfare), and the UH-60Q (medical transport). Two major variants of the Black Hawk currently exist: the UH-60L and UH-60M. The UH-60L incorporates improvements to the basic design that provide more power and lifting capability, as well as automatic flight control. The newer UH-60M features upgraded engines, improved rotor blades, and state-of-the-art flight controls that will allow the helicopter s service life to extend to 2020 and beyond. Over 2500 Black Hawks have been built, and nearly 1000 more are currently on order. Black Hawks have seen combat service for the U.S. Military in Grenada, Panama, Somalia, Afghanistan and Iraq. Other nations also employ the UH-60 including Brazil, Colombia, Israel, Mexico, Taiwan, Australia, Japan, and Turkey. Created by Sikorsky and the U.S. Army, this pilot s flight operating manual profiles the UH-60Q Black Hawk. Over 500 pages long, this unclassified document is reprinted here in its entirety."

The Development of an Airborne Instrumentation Computer System for Flight Test

Author :
Publisher :
ISBN 13 :
Total Pages : 22 pages
Book Rating : 4.:/5 (317 download)

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Book Synopsis The Development of an Airborne Instrumentation Computer System for Flight Test by :

Download or read book The Development of an Airborne Instrumentation Computer System for Flight Test written by and published by . This book was released on 1984 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: Instrumentation interfacing frequently requires the linking of intelligent systems together, as well as requiring the link itself to be intelligent. The airborne instrumentation computer system (AICS) was developed to address this requirement. Its small size, approximately 254 by 133 by 140-mm, standard bus, and modular-board configuration give it the ability to solve instrumentation interfacing and computation problems without forcing a redesign of the entire unit. This system has been used on the F-15 aircraft digital electronic engine control (DEEC) and its follow-on engine model derivation (EMD) project, and in an OV-1C Mohawk aircraft stall-speed warning system. The AICS is presently undergoing configuration for use on an F-104 pace aircraft and on the advanced fighter technology integration (AFTI) F-111 aircraft.

Task Analysis of the UH-60 Mission and Decision Rules for Developing a UH-60 Workload Prediction Model

Author : Carl R. Bierbaum
Publisher :
ISBN 13 :
Total Pages : 48 pages
Book Rating : 4.3/5 ( download)

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Book Synopsis Task Analysis of the UH-60 Mission and Decision Rules for Developing a UH-60 Workload Prediction Model by : Carl R. Bierbaum

Download or read book Task Analysis of the UH-60 Mission and Decision Rules for Developing a UH-60 Workload Prediction Model written by Carl R. Bierbaum and published by . This book was released on 1989 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Modal Analysis of UH-60A Instrumented Rotor Blades

Author : Karen S. Hamade
Publisher :
ISBN 13 :
Total Pages : 52 pages
Book Rating : 4.:/5 (317 download)

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Book Synopsis Modal Analysis of UH-60A Instrumented Rotor Blades by : Karen S. Hamade

Download or read book Modal Analysis of UH-60A Instrumented Rotor Blades written by Karen S. Hamade and published by . This book was released on 1990 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Time Domain Validation of the Sikorsky General Helicopter (GenHel) Flight Dynamics Simulation Model for the UH-60L Wide Chord Blade Modification

Download Time Domain Validation of the Sikorsky General Helicopter (GenHel) Flight Dynamics Simulation Model for the UH-60L Wide Chord Blade Modification PDF Online Free

Author : Robert L. Barrie
Publisher :
ISBN 13 : 9781423540335
Total Pages : 158 pages
Book Rating : 4.5/5 (43 download)

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Book Synopsis Time Domain Validation of the Sikorsky General Helicopter (GenHel) Flight Dynamics Simulation Model for the UH-60L Wide Chord Blade Modification by : Robert L. Barrie

Download or read book Time Domain Validation of the Sikorsky General Helicopter (GenHel) Flight Dynamics Simulation Model for the UH-60L Wide Chord Blade Modification written by Robert L. Barrie and published by . This book was released on 1999-12-01 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: Helicopter design at the Sikorsky Aircraft Corporation is aided by the use of the Sikorsky General Helicopter (GenHel(registered)) Flight Dynamics Simulation Model. Specifically, GenHel output is used by both handling qualities and maneuver loads engineers as a predictive design tool. Inherent in the use of an analytical model is the requirement for validation. This report seeks to validate the GenHel(registered) flight dynamics simulation models used in the design of the UH-60L Wide Chord Blade (WCB) modification. initially comparisons are made between the current analytical models and flight test data for selected trim flight conditions and dynamic maneuvers. Based on the correlation of the data, modifications are made to the analytical model where necessary. The modified analytical model will be validated through a final comparison with test flight data. The goal of this report is to validate the use of Sikorsky's GenHel(registered) flight simulation program as an analytic predictive tool in the design of the WCB modification and identify any areas where improvements could be applied. Validation of the WCB GenHel model serves two purposes. First it confirms the ability of GenHel to model the flight dynamic response of the UH-60L with the WCB modification. Second it confirms the predictive loads forwarded to the structural engineers during the design phase of the WCB.

Flight Testing of Small Remotely Piloted Aircraft for System Identification

Author : Aaron Wypyszynski
Publisher :
ISBN 13 : 9781109474169
Total Pages : 137 pages
Book Rating : 4.4/5 (741 download)

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Book Synopsis Flight Testing of Small Remotely Piloted Aircraft for System Identification by : Aaron Wypyszynski

Download or read book Flight Testing of Small Remotely Piloted Aircraft for System Identification written by Aaron Wypyszynski and published by . This book was released on 2009 with total page 137 pages. Available in PDF, EPUB and Kindle. Book excerpt: Flight testing of small unmanned aircraft (span 4-8ft, weight 5-15lbs, speed 30-100ft/s) in both the academic and small company fields is sparse at best. Most test programs consist of little more than attempting to perform a mission and then determining if objectives were met. Often, a flight test program may determine an aircraft drag polar at most. In order to truly determine the qualities of an aircraft, it is important to determine the aerodynamic, stability, and control parameters of the aircraft system, so that increased quantitative analysis and comparison may be performed versus the low-level analysis that is typically performed. When qualitative analysis is used to improve a design, the process can be lengthy as a trial and error a process is used to determine what improves or degrades performance. The use of system identification can immediately and quantitatively determine the aircraft parameters. This greatly shortens both the time and the cost of improving the aircraft design. Three factors often prevent the use of system identification in academic and small company settings; complexity, lack of a process that minimizes the challenges of testing small unmanned aircraft and cost. Processes currently used in large flight testing programs in industry provide excellent results, yet take several years of experience to become familiar with and multiple tests in order to tune the processes for best results. Testing small unmanned aircraft also poses several problems, both due to the fact that the pilot is removed from the aircraft and that aircraft in the size range of this study are more susceptible to atmospheric turbulence due to their low wing loading. Cost of a data acquisition system capable of performing system identification is also prohibitive, costing several thousands of dollars when the maximum limit for many small projects can be as little as USD 1000 for data acquisition hardware. This thesis discusses a method that addresses all three of these problems to enable aircraft system identification on a low budget and short time period for someone who has limited experience in aircraft system identification.

Problems of System Identification in Flight Vibration Testing

Author :
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (227 download)

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Book Synopsis Problems of System Identification in Flight Vibration Testing by :

Download or read book Problems of System Identification in Flight Vibration Testing written by and published by . This book was released on 1984 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The accuracy of modal data analysis was studied for two tests with up to 8 different methods of analysis. It was found that the state of the art is poor and insufficient to deal with critical flutter cases. Improvements are possible and should be sponsored.