8/19/2019 Landing_gear_mechanism[1].pptx

http://slidepdf.com/reader/full/landinggearmechanism1pptx 1/6

Landing gear mechanism

By :- Vikram Ghogare

Guided by :- Prof. Patil Sir

8/19/2019 Landing_gear_mechanism[1].pptx

http://slidepdf.com/reader/full/landinggearmechanism1pptx 2/6

Abstract

•Landing gear of an aircraft is an equiment that ser!es t"orimary functions. #irst$ it allo" aircraft to safely and

successfully land and second is to suort aircraft at restcondition. Landing gear is designed according torequirement and nature of "ork of aircraft.

PURPOSE

•

 %he urose of this chater is to resent a introduction andliterature

• re!ie" summari&ing the re!ious ublished "ork rele!ant toresearch

• ob'ecti!es.

8/19/2019 Landing_gear_mechanism[1].pptx

http://slidepdf.com/reader/full/landinggearmechanism1pptx 3/6

L(%)*A%+*) *)V(),•  %he shae otimi&ation can be done.

• +se of comosite material may reduce "eight and strength canbe imro!ed.

•  %he test should be build and analysis can be erformed on thelanding gear unit

• Assembly is the rocess in "hich t"o or more ob'ects are 'oined

together to achie!e the desired function. Assembly modeling isthe rocess of creating designs that consist of t"o or morecomonents assembled together at their resecti!e "orkositions.

•  %he comonents are brought together and assembled in theAssembly esign en!ironment by alying suitable arametric

assembly constraints to them.

8/19/2019 Landing_gear_mechanism[1].pptx

http://slidepdf.com/reader/full/landinggearmechanism1pptx 4/6

(%*/+0%(/

• Aircraft1s ma'or comonent that is needed to be designed islanding gear. %he landing gear is the structure that suorts anaircraft on the ground and allo"s it to take-o2$ and land.

•  the structural design asects of landing gear are not addressed3but$ those design arameters "hich strongly imact the aircraft

con4guration design and aircraft aerodynamics "ill be discussed.•  (n addition$ some asects of landing gear such shock absorber$

retraction mechanism and brakes are assumed as non-aeronauticalissues and may be determined by a mechanical engineer.

• (n general$ the follo"ings are the landing gear arameters "hichare to be determined :

•  5. %ye 6e.g. nose gear 6tricycle7$ tail gear$ bicycle7

•  8. #i9ed 6faired$ or un-faired7$ or retractable$ artially retractable

8/19/2019 Landing_gear_mechanism[1].pptx

http://slidepdf.com/reader/full/landinggearmechanism1pptx 5/6

•  . ;eight

• <. ,heel base

•  =. ,heel track

•  >. %he distance bet"een main gear and aircraft cg

• ?. Strut diameter

•  @. %ire si&ing 6diameter$ "idth7• . Landing gear comartment if retracted

PROBLEM DESCRIPTION

• Landing gear !ibration includes self-induced oscillation referred to as shimmy and brake-induced !ibration.

• Shimmy may be caused by a number of oscillations such as lo" torsional sti2ness $

e9cessi!e freelay in gear bo9 $ "heel imbalance $ or "orn arts .•  Brake-induced !ibration includes conditions kno"n as gear "alk $ squeal and chatter

"hich are caused by the characteristics of friction bet"een the brake rotating andnonrotating arts.

• Squeal refers to the high frequency rotation oscillation of the brake stator assembly"hereas chatter and gear "alk refer to the lo" frequency fore and motion of th gear.

8/19/2019 Landing_gear_mechanism[1].pptx

http://slidepdf.com/reader/full/landinggearmechanism1pptx 6/6

0onclusion:

•  %he fundamental method of modelling thedeformation during the landing of lander isderi!ed. Based on AAS C ASDS

simulation soft"are$ the rigid Ee9ible coulingdynamics of a system "ith Ee9ible cantile!erattached to the main lander is analy&ed. #orboth taking account of deformation and takingno account of deformation$ the simulationresults indicate that the deformation ofrimary strut has considerable e2ect onstability of the lunar lander system.