無人機專業(yè)英語課件：components of uav

無人機專業(yè)英語

Components

of

UAVFixed-wing:

Structure

and

ComponentHand-on:

TheAssembly

of

UAIntroduction

toFuselageC

O

N

T

E

N

TExternal

Loadand

Overload2.4Multi-rotor

UAVUnmannedHelicopter2.32.52.12.22.6Generally,the

external

force

acting

on

the

aircraft

during

takeoff,flight,landing

and

ground

parking

is

called

the

external

load

of

the

aircraft.Theseexternal

loads

include

aerodynamics,aircraft

gravity,engine

thrust,

inertiaforce,ground

reaction

force

during

aircraftlanding,groundtaxiingandshutdown,etc.External

Load

and

OverloadExternal

Load

of

Fixed-wing

UAVExternal

load

on

UAV2.12.1.11According

to

the

Form?concentrated

load?distributed

load2According

to

the

Properties?static

loads?dynamic

loads3According

to

the

State

ofAircraft?fight

load?ground

load

2.1

External

Load

and

Overload

2.1.2Classification

of

External

LoadLoads,except

for

gravity,varies

with

time

during

maneuver

flight

or

when

theaircraft

is

encountered

with

sudden

wind.The

external

load

can

only

reflect

themagnitude

and

direction

of

the

force

on

the

aircraft.In

order

to

facilitatetheanalysis

of

the

external

load

on

the

aircraft

in

a

certain

flight

state,the

force

on

theaircraft

at

that

time

is

usually

compared

with

the

gravity

of

the

aircraft.This

isthedefinition

of

overload.External

Load

and

OverloadIntroduction

of

Overload2.12.1.3The

wing

structure

is

a

thin-walled

structure,generally

composed

ofthefollowing

typical

elements:Longitudinal

elements

include

wing

beams,stringers,walls;Transverse

elements

include

wing

ribs(common

ribs

and

reinforced

ribs)and

skin

wrapped

outside

the

framework

composed

of

longitudinal

and

transversemembers.Fixed-wing:

Structure

and

ComponentsComponents

of

Fixed-wing2.22.2.1Fixed-wing:

Structure

and

ComponentsComponents

of

Fixed-wing2.22.2.1StringersRibSparSkinFixed-wing:

Structure

and

ComponentsClassification

of

Fixed-wing2.2Metal

Skin

WingCloth

Skin

Wing2.2.2During

flightandlanding,thefuselagestructureshallbeartheconcentrated

load

transmitted

from

the

fixed

joints

of

wing,tail,

landinggear

and

other

components,which

is

the

main

external

load

of

the

fuselage.At

the

same

time,it

also

bears

loads

of

various

components,the

gravity

offuselage

itself

as

well

as

aerodynamic

forces.Introduction

to

FuselageExternal

Load

of

FuselageExternal

Load

of

Fuselage2.32.3.1The

fuselage

structure

of

modern

aircraft

is

composed

of

stringer,spacer

frame

and

skin.The

spacer

frame

is

divided

into

ordinary

frameand

reinforced

frame.Ordinary

frame

is

used

to

maintain

the

sectionalshape

of

the

fuselage,while

the

role

of

reinforced

frame

is

to

spread

theconcentrated

force

to

the

fuselage

structure

through

the

joint,and

thentransmit

it

to

the

skin

in

the

form

ofshearflow.Introduction

to

FuselageComponents

of

FuselageStructure

of

Fuselage2.32.3.2With

the

improvement

of

aircraft

flight

performance,the

structure

of

the

fuselage

is

alsodeveloping.According

to

the

stress

of

the

skin

of

fuselage,the

fuselage

structure

is

divided

intodifferent

types

as

follows:·Framework

type.·Monocoque

type.·Semi-Monocoquetype.Introduction

to

FuselageClassification

of

FuselageSemi-Monocoque

Type

FuselageFramework

Type

FuselageMonocoque

Type

Fuselage2.32.3.3Multi-rotor

UAV(also

called

multi-axisUAV)is

a

special

helicopter

with

three

ormore

rotor

axes.The

motor

on

each

axisrotates

to

drive

the

rotor

to

generate

thrust.This

kind

of

aircraft

is

mostly

symmetricalor

axial

symmetrical.Multi-rotor

UAVStructure

of

Multi-rotor

UAV2.4Introduction2.4.1Power

devices

used

by

UAVmainly

includepistonengine,turbojet

engine,turbofan

engine,turboprop

engine,

turboshaftengine,ramjet

engine,rocketengine,motor,etc.Multi-rotor

UAVComponents

and

FunctionsElectronic

Speed

ControllerPropeller

of

UAV2.42.4.2MotorBattery1Fighter

Aircraft·J-10·J-20·J-312Fighter

Bomber

Aircraft·JH-73Trainer

Aircraft·JL-8·JL-9·L-154Transport

Aircraft·Y-8·Y-9·Y-205Bomber

Aircraft·H-6·H-206Helicopter·Z-8·Z-9·HC-120/EC1207Unmanned

Aerial

Vehicle·AVIC

CloudShadow·Wing

Loong

UAVAVIC

has

played

a

major

rolein

developing

Chinese

aviationfor

two

decades,and

it

has

morethan160different

aerospaceproducts

across11categories.Some

famous

products

are

asfollows:Multi-rotor

UAVThe

Development

of

AVIC2.42.4.3NameAmountNameAmountFrame1setFoot

stand1setPropeller2pairsFCS1setMotor4Damping

plate1Electric

regulation4GPSmodule1Battery1groupGPSbracket1Remote

controller1DuPont

line4Receiver1…UAVassemblyisanimportantskill

for

UAV

application

technology.Here

we

takeacertainUAVdevice

for

example.See

the

following

table

for

the

list

of

accessories.Hand-on:

The

Assembly

of

UAVIntroduction2.52.5.1Which

includes:?Welding

of

motor

wire

and

banana

head.?Welding

of

electric

adjusting

wire

and

banana

head.?Weld

the

electric

regulator

and

power

cord

to

the

lower

center

plate.?Welding

of

T-head.Use3Mgluetopastetheflightcontrolonthetop(front)ofthelowercenter

plate,and

try

to

install

the

flight

control

on

the

center

of

thelower

center

plate.Use

foam

double-sided

adhesive

tape

to

installthe

receiver

on

the

lower

center

plate.Install

the

MotorFix

the

motor

on

the

baseoftheboom. Install

the

Lower Center

PlateWhen

installing

the

lower

centerplate,tightenthescrewsmoderately

to

avoid

screw

damage.Hand-on:

The

Assembly

of

UAVProcess

of

AssemblyInstall

Flight

Controland

ReceiverWeldingofLines2.52.5.2The

fixing

mode

of

bladeisrelatedtothetypeofmotorandblade.Takethe

installation

of

DJI

F450propeller

for

example,the

side

printedwithDJI

LOGO

is

upward,and

the

section

with

bigger

thickness

iswindward.The

installation

position

can

be

determined

by

clockwiserotation. Install

Upper

CenterPlateFirst,assemble

the

GPS

carbon

rod

bracket

with

glue,then

install

theGPS

base

on

the

M4arm

screw

hole

of

the

upper

center

plate,

andthenfix

the

GPS

on

the

top

plate

of

thebracketwithadhesivetape.In

order

to

install

the

electric

regulator

firmly,installtheflatsideonthearm,fix

it

with

self-locking

ties,and

then

installtheelectricregulatortothe

arm.Hand-on:

The

Assembly

of

UAVProcess

of

AssemblyPlace

the

upper

center

plate

at

the

correct

position

and

fix

itwithscrews.Install

ElectricRegulatorInstall

GPS

and

LEDInstall

Propeller2.52.5.2Hand-on:

The

Assembly

of

UAV“6S”

Regulations“6S”Standardize

(Seiketsu)Set

in

order(Seiton)Sustain

(Shitsuke)2.5Shine

(Seiso)Sort

(Seiri)2.5.3SafetyUnmanned

helicopter

refers

to

theUAV

that

can

realize

VTOL(

verticaltake

off

and

landing)and

has

the

mostflexibility.It

belongs

to

rotary

wingUAV

in

configuration

and

generalaircraft

in

function.Unmanned

HelicopterIntroduction2.62.6.1The

lift

of

unmanned

helicopters

is

generated

by

rotors.The

basic

structure

ofunmanned

helicopter

is

generally

composed

of

main

rotor,fuselage,tail

rotor,landing

gear,control

system,transmissionsystem,motororengine,etc.Unmanned

HelicopterComponents

of

Unmanned

HelicopterA

Typical

Unmanned

Helicopter2.62.6.2Us

e

c

o

nne

c

t

i

ng

wo

r

d

s

a

nd

phrases

to

connect

sentences

that

contain

related

topics

.To

p

i

c

sen

t

e

n

ce

an

d

k

ey

words

.Do

not

omit

words

to

make

your

sentences

shorter.Use

a

vertical

list

for

complex

text.Unit

2

English

Training

Partsafety

instructions

.Take

care

ofHedging

.Rule2

.6Rule2

.5Rule2

.3Rule2

.2Rule2

.4Rule2

.1?Do

not

omit

nouns

to

make

sentences

shorter.

It

will

be

difficult

for

the

reader

to

know

w

hat

you

mean

.Non

-

STE

:

Can

be

a

maximum

of

five

inches

long

.STE

:

Cracks

can

have

a

maximum

length

of

five

inches

.?Do

not

omit

verbs,

because

the

reader

w

ill

not

understand

w

hat

the

action

is

.

Non

-

STE

:

Rotary

sw

itch

to

INPUT.STE

:

Set

the

rotary

sw

itch

to

INPUT.?Do

not

omit

the

subject,

because

the

reader

w

ill

not

know

w

hat

you

are

referring

to

.

Non

-

STE

:

If

installed,

remove

the

shims

.STE

:

If

shims

are

installed,

remove

them

.Do

not

omit

w

ords

to

make

your

sentences

shorter.R

ul

e2.

1When

the

sentence

is

long

and

you

must

include

many

different

items

(for

example,

a

list

of

components,

parts,

or

documents)

or

actions

in

a

sentence,

you

can

put

them

in

a

vertical

list

.

Vertical

lists

make

long

complex

sentences

much

easier

to

read

and

understand

.Non

-

STE

:

The

wheel

assembly

comprises

the

tire,

the

tube,

the

spokes,

the

spoke

fittings,

the

valve,

and

the

hub

.STE

:

The

w

heel

assembly

has

these

parts

:·

The

tire·

The

tube·

The

spokes·

The

spoke

fittings·

The

valve·

The

hubUse

a

vertical

list

for

complex

text

.R

ul

e2.

2【Examples】(

1

)

These

safety

precautions

are

the

minimum

necessary

for

work

in

the

pit

lane

.

But

the

local

regulations

can

give

other

necessary

safety

precautions

.(

2

)

If

the

pressure

increases,

it

changes

the

electrical

currents

in

the

transmitter.

Thus,

the

pow

er

unit

supplies

currents

to

the

indicator

on

the

related

panel

.(

3

)

When

the

hydraulic

pressure

is

released,

the

sequence

valve

moves

to

the

open

position

.

As

a

result,

the

actuators

are

connected

to

the

hydraulic

return

.Use

connecting

w

ords

and

phrases

to

connect

sentences

that

contain

related

topics

.R

ul

e2.

3Hedging,

also

called

caution

or

cautious

language

or

tentative

language

or

vague

language,

is

a

way

of

softening

the

language

by

making

the

claims

or

conclusions

less

absolute

.

It

is

especially

common

in

science

and

engineering,

for

example,

when

giving

a

hypothesis

or

presenting

results

.Hedges

can

be

contrasted

with

boosters

(such

as

“will”

or

“definitely”

or

“always”),

which

allow

writers

to

express

their

certainty.

These

are

less

commonly

used

in

academic

writing,

though

tend

to

be

overused

by

learners

of

academic

English

in

place

of

more

cautious

language

.Hedging

.R

ul

e2.

4(

1

)

WARNING:

Before

you

fill

the

liquid

oxygen

system,

put

on

a

face

mask

and

protective

clothing

.

Liquid

oxygen

can

cause

irritation

of

the

respiratory

tract

and

eye

irritation

.(

2

)

WARNING:

Always

keep

your

hands

and

feet

away

from