Purposes for production plan for 1100 DOM and 28 DU assembly

downtownbeeMechanics

Nov 18, 2013 (3 years and 10 months ago)

74 views

Purposes for production plan for
1100 DOM and 28 DU assembly

Gianfranca De Rosa

Dept

of
Physics
,
Univ
. Federico II, and INFN
Naples

DOM Assembly


Sites


200 m
2
:
assembly

and test set up


200 m
2
:
storage

components

and
DOMs



Facilities
:


Electronic Lab


Dark Box


Cleaning

space

and
tools

for test,
splicing

optical

fibres
,….

About 1100 DOM to be assembled

DU Assembly


Sites


200 m
2
:
assembly

and test set up


200
-
300 m
2
:
storage

components

and
DUs



Facilities
:


overhead

travelling

crane



10 t


Minimum
height

5
-
6 m

About 30 DU to be assembled

A
possibility
:
address

external

companies for
(part of) DOM and DU
assembly


A
ssessment of the assembly costs with external
companies



Contacts

with companies of the
Aerospace

Technology Center of Napoli



Reliability already proven in other experiments

The main areas concerning
Science and Research

are:



Observation from the Earth and Space



Structures for space application



Phisics of particles



Scientific experimentation in the aeronautic field



Monitoring and enviroment surveillance in critical conditions

USV
:

Ummanned

Space

Vehicle

(USV)

project,

within

the

Italian

Aerospace

Research

Program

(PRORA),

managed

by

Italian

Aerospace

Research

Centre

(CIRA),

aims

at

the

development

of

a

revolutionary

technology
.

In

partnership

with

Carlo

Gavazzi

Space

S
.
p
.
a
.
,

Marotta

A
.
T
.

is

projecting

and

developing

two

USV

vehicle
.

VIRMOS
:
The

VIRMOS
project has delivered the
VIMOS spectrograph for
the European Southern
Observatory Very Large
Telescope (ESO
-
VLT).
The Marotta A.T. s.r.l.
was responsible for the
construction of all units
and related subsystems.


VST

(VLT
Survey

Telescope
)

Marotta s.r.l. has joined the realization
of prototypes of all actuators for active
optics.
Supervisioning

engineering and
production for the implementation of
structural steel and
its

mechanical
components

From the idea to the product in one company structure with
integrated services and processes for:

-

Aeronautics and space

-

Scientific research

-

Mechanical work

-

Aeronautical maintenance

www.marottasrl.it


info@marottasrl.it

E
-
ELT

Marotta s.r.l. has joint the technical
proposal for Front
-
End Engineering
Design (FEED) Study of the

Secondary Mirror Unit for the
European Extremely

Large Telescope (E
-
ELT)

Manufacturing and Integration for space instrumentation:




Pamela Telescope Project


Hexapod

International Space Station


MECFOND

http://www.mecfond.it/

designing and manufacturing high
capacity mechanical presses for the
automotive industry and special machines
and systems for the aeronautical sector.

Assembly shop

The size of plant, advanced and updated machineries, highly qualified staff grant us a
productive capacity.

In addition, thanks to its strategic location the company is easily accessible, and it is very
close to the
harbour

(1 km).

A
ssessment of the assembly costs
DOM

Operazioni

posizionare PMT (n
°
19) nel
foam
,

con i coni d'
espansione

collegare PMT alle schede

pulire le semisfere

test elettrico del sensore
piezo
-
acustico

ed incollaggio

posizionare il
foam

assemblato nella semisfera

test (corrente consumo a 400 V, registrazioni)

gel (
pouring

e
outgassing
)

imbustare, sigillare, e posizionare le semisfere in
ambiente scuro

Operazioni

sovrapporre le semi
-
sfere

sistemeare le sfere in una camera a vuoto con i guanti

ridurre la pressione a 700
mbar

sigillare le sfere

testare la funzionalità con led

dare potenza elettrica e misurare i consumi

Mappare ogni PMT

test

test

test idrostatici

record test

4,5 h

255


Emisfero
inferiore

Operazioni

come sopra

montare EO penetrator

gluing

cooling

system

montare le schede e testare

montare il nano beacon e testare (incollaggio)

montare la scheda con il
tiltometro

e la bussola
e collaudare

pressure

gauge
,
fiber

splice

montare il PMT sull'octopus
board

posizionare in dark box e testare i PMT (
n
°

12)

gel (
pouring

e
outgassing
)

5,6 h

290


Chiusura
sfera

Emisfero
superiore

9,3 h

500


Tot: 1045


Assembly = 12% DOM

Timetable

DOM
assembly

Production Capability
1 DOM: 2.5 man-day
3 DOM/day can be produced with 7 persons+1 coordinator
66 DOM / month
800 DOM in 12 months
Timetable


2012


Completion

of
construction

projects


Tenders


Preparation

of
assembly

sites


2013


Production


Assembly


2014


Assembly


Deployment



End of the
operations
:
december

2014

Organizational Plan for the production


of
1100 DOM e 28 DU


Technology Transfer
for learning the techniques of
integration and testing

of the DOM



Industrialization

of production
process

to
assure

60
DOM/
month

and 3 DU/ mese

-
The deployment of 28DU requires a precise and compelling program of
the production and integration, both for DOM and DU

-
The production of 1100 DOM (66/month for 18 months) requires a
mass production line with an accurate plan of Industrial Management
and Production Organization

Production Plan DOM Assembly

-
DOM
validation


-
Preparation

of Technology Transfer
has

to start
soon
, in
parallel

with the
Studies

for
development

of
industrialization

plans
.

-
Good

the
partecipation

of the
respondibles

of TT to the
assembly

phase

of the DOM to be
installed

in ANTARES
line and
at

Capo Passero

Same

conditions

needed

also

for the DU
assembly

Production Plan DOM Assembly

Time (days)
DOM validation
Preparation of Technology Transfer
120
Development Industrialization Plans
120
Technology Transfer (TT)
60
Sites Arrangment
60
Pre-production
40
Mass Production
390
DOM validation
Preparation of Technology Transfer
Development Industrialization Plans
Technology Transfer (TT)
Sites Arrangment
Pre-production
Mass Production
start
1
gen 2013
end
30 jun
2014
Production Plan DOM

ELT M2 Unit
-
Project Engineering


OPTEON
SUPERIOR
ANGULAR
RESOLUTION
OPTEON
SUPERIOR
ANGULAR
RESOLUTION
STRATEGIC ASPECTS:



Maximum reduction of the system weight and inertia;



Maximum stiffness related to the system
eigenfrequency



Maximum stability of the connected and drive
components in order to minimize the system error
budget (zero backlash)

PROPOSAL OBJECTIVES

provide new generation technologies of design and
manufacturing applied to astronomical technology able to
realize an M2 Unit complete system compliant to ESO
specifications and at the same time innovative



Maximum safety during telescope science and maintenance operations



Maximum performances within the overall telescope structure



Easy and economic to produce with industrial robust solutions




W
ith the highest accuracy



Easy to test



Easy to maintain



Innovative respect to other solutions present today