An Overview of Landing Gear Dynamics PDF Download
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Author: Jocelyn I. Pritchard
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 22
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Book Description
On of the problems facing the aircraft community is landing gear dynamics, especially shimmy and brake-induced vibration. Shimmy and brake-induced vibrations can lead to accidents due to excessive wear and shortened life of gear parts and contribute to pilot and passenger discomfort. To increase understanding of these problems, a literature survey was performed. The major focus is on work from the last ten years. Some older publications are included to understand the longevity of the problem and the background from earlier researchers. The literature survey includes analyses, testing, modeling, and simulation of aircraft landing gear; and experimental validation and characterization of shimmy and brake-induced vibration of aircraft landing gear. The paper presents an overview of the problem, background information, and a history of landing gear dynamics problems and solutions. Based on the survey an assessment and recommendations of the most critically needed enhancements to the state of the art will be presented. The status of Langley work contributing to this activity will be given.
Author: Jocelyn I. Pritchard
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 22
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Book Description
On of the problems facing the aircraft community is landing gear dynamics, especially shimmy and brake-induced vibration. Shimmy and brake-induced vibrations can lead to accidents due to excessive wear and shortened life of gear parts and contribute to pilot and passenger discomfort. To increase understanding of these problems, a literature survey was performed. The major focus is on work from the last ten years. Some older publications are included to understand the longevity of the problem and the background from earlier researchers. The literature survey includes analyses, testing, modeling, and simulation of aircraft landing gear; and experimental validation and characterization of shimmy and brake-induced vibration of aircraft landing gear. The paper presents an overview of the problem, background information, and a history of landing gear dynamics problems and solutions. Based on the survey an assessment and recommendations of the most critically needed enhancements to the state of the art will be presented. The status of Langley work contributing to this activity will be given.
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781721181285
Category :
Languages : en
Pages : 34
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Book Description
One of the problems facing the aircraft community is landing gear dynamics, especially shimmy and brake-induced vibration. Shimmy and brake-induced vibrations can lead to accidents due to excessive wear and shortened life of gear parts and contribute to pilot and passenger discomfort. To increase understanding of these problems, a literature survey was performed. The major focus is on work from the last ten years. Some older publications are included to understand the longevity of the problem and the background from earlier researchers. The literature survey includes analyses, testing, modeling, and simulation of aircraft landing gear; and experimental validation and characterization of shimmy and brake-induced vibration of aircraft landing gear. The paper presents an overview of the problem, background information, and a history of landing gear dynamics problems and solutions. Based on the survey an assessment and recommendations of the most critically needed enhancements to the state of the art will be presented. The status of Langley work contributing to this activity will be given. Pritchard, Jocelyn I. Langley Research Center NASA/TM-1999-209143, NAS 1.15:209143, ARL-TR-1976, L-17840
Author: Jocelyn I. Pritchard
Publisher:
ISBN:
Category :
Languages : nl
Pages :
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Book Description
Author:
Publisher:
ISBN:
Category : Aircraft
Languages : en
Pages : 86
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Book Description
The ability to accurately predict the dynamic response of an aircraft while it is operating in the taxi mode depends, in part on the correct modeling of the dynamic characteristics of the landing gear system. Traditionally, landing gear have been designed to absorb landing impact ('shock absorber') and their characteristics during periodic, oscillatory response ('spring') have been considered as secondary. With the increased emphasis on the rough or damaged field taxi operation, there is a requirement to determine the best methods for modeling the gear system. This report documents a brief review of the state of the art of gear modeling. A study was then conducted to evaluate important model parameters, using a simple cantilevered gear computer simulation. Also included is the development of a technique for the experimental determination of important gear system parameters. (Author).
Author: William H. Sellers
Publisher:
ISBN:
Category :
Languages : en
Pages : 163
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Book Description
A study of aircraft landing gear dynamics is presented from the viewpoint of comparing various methods of treating landing gear dynamic problems. Analytical methods for finding oleo strut forces, tire forces, and for treating the aircraft landing gear dynamics problem, from the simple one degree of freedom system to an equivalent system of six degrees of freedom, are studied and results formulated. One section of this report is devoted to a survey of the known mathematical techniques for treating nonlinear mechanics problems. Also a method of reducing the solution of a set of nonlinear differential equations to the solution of a set of linear equations has been developed. Equations of motion which predict the behavior of the landing aircraft from initial impact, during rebound and to final runout are written, solved, and correlated with an actual landing. Attention is called to the direct simulation analog computer or electric circuit model study of drop testing a gear. Results from this study are compared and correlated with drop test data. A brief account of the physics of rebound phenomena is also presented. (Author).
Author: James L. Edman
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: Norman S. Currey
Publisher: AIAA
ISBN: 9781600860188
Category : Airplanes
Languages : en
Pages : 394
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Book Description
This is the only book available today that covers military and commercial aircraft landing gear design. It is a comprehensive text that will lead students and engineers from the initial concepts of landing gear design through final detail design. The book provides a vital link in landing gear design technology from historical practices to modern design trends, and it considers the necessary airfield interface with landing gear design. The text is backed up by calculations, specifications, references, working examples.
Author: Prashant Khapane
Publisher:
ISBN:
Category :
Languages : en
Pages : 108
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Book Description
Author: Edwin L. Fasanella
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 52
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Book Description
Author: Robert Kyle Schmidt
Publisher: SAE International
ISBN: 0768082463
Category : Technology & Engineering
Languages : en
Pages : 138
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Book Description
The aircraft landing gear system is relatively unique on board an aircraft—it is both structure and machine, supporting the aircraft on the ground, yet providing functions such as energy absorption during landing, retraction, steering, and braking. Advances in Aircraft Landing Gear is a collection of eleven hand-picked technical papers focusing on the significant advancements that have occurred in this field concerning numeric modeling, electric actuation, and composite materials. Additionally, papers discussing self-powered landing gear and more electrical overall aircraft architectures have been included. The content of Advances in Aircraft Landing Gear is divided into two sections: Analysis and Design Methods; and Electric Actuation, Control, and Taxi. For those looking for more information on aircraft landing gears, the SAE A-5 committee (the Aerospace Landing Gear Systems Committee), which meets twice a year, serves as a useful forum for discussion on landing gear issues and development. A current listing of documents produced and maintained by this committee appears in the appendix.
