A Finmeccanica Company 04/2000/1 EUSO Development Philosophy EUSO General Meeting Max Planck...

A Finmeccanica Company 04/2000/1

EUSODevelopment Philosophy

EUSO General Meeting

Max Planck Institute for Physics

Munich, November the 20th 2003


Introduction

Alenia contribution, in support of Instrument System responsibility, covered, during the phase A study, the following aspects:

– Development approach and associated model philosophy– System Verification Tasks outline– Provisions of guidelines for the various equipment, sub-assemblies and

subsystems, as provided by the Scientific Consortium, called for sake of comprehension: Customer Furnished Equipment (CFE)

The presentation addresses, therefore:– Development Philosophy– Guidelines for Equipment/Sub- assemblies/Subsystems– Open Areas to be covered in the following Program Phases– Schedule Outline


Development Philosophy - General

The Development philosophy for the EUSO Instrument has as sustaining pillars:

– an Assembly, Integration and Verification Program– and a Model Philosophy

The objectives of the AIV Program are primarily to:– qualify the design,– ensure that the products are in agreement with the qualified design and free

from workmanship defects and acceptable for use,– verify that the overall system (including tools, procedures and resources) will be

able to fulfil mission requirements,– achieve the delivery in due time of the flight model, – minimise the overall development costs.


Development Philosophy - General

The methods of verifications are the standard ones, i.e.:– test, analysis, review of design and inspection. Note (1)

The stages of the verification process encompass the development, qualification and acceptance phases.

The levels will be:– Equipment,– Subsystem and/or Sub-assembly (e.g. structure, harness etc…),

– EUSO Integrated Instrument,– EUSO Integrated Payload, i.e.: EUSO Instrument + Mission/Launch Specific

Items.

Note (1): The test methodology will be the main method of verification and will be used when analytical techniques cannot provide reliable results.


Development Philosophy - Instrument level

The AIV Campaign is based primarily on:– an Instrument STM– an Instrument PFM.

Three major verification steps are preliminarily identified:– Instrument thermo-mechanical qualification on the Instrument Structural

Thermal Model (STM)– Instrument functional qualification on the Instrument Protoflight Model (PFM)– Integrated Payload qualification on the EUSO Payload PFM


Development Philosophy - Guidelines for Subsystems

Equipment/Subsystem Developers (CFE) are to provide their development plans in order to harmonise and make them compatible with the overall EUSO Instrument development.

As far as models and associated development phases are concerned, the following approach is proposed:

– B.B./D.M./T.M. can be used to develop technology and demonstrate design adequacy

– E.M. (Either Engineering or Electrical Models) to demonstrate Items functionality and interface adequacy.

– PFM to qualify the items. It will be accepted also an EQM/QM and FM approach, if necessary.

Developers are requested to provide an STM to the EUSO Instrument Integrator. In certain cases, STMs can be used to achieve qualification of design, e.g. primary structure.


Development Philosophy - Overall LogicBREADBOARD/ELECTRICA

L MODEL

Flight Design OrientedCommercial/MIL parts

B/BCritical Parts

B/B2.4

STRUCTURAL THERMALMODEL

Flight representative

STMSubsystems

STM2.3

PROTO-FLIGHT MODELFlight StandardHigh-Rel Parts

PFMSubsystems

PFM2.2

EU

SO

IN

ST

RU

ME

NT

AS

SE

MB

LY

/ S

UB

SY

ST

EM

SE

US

O P

/L S

YS

TE

M

Some elementsmay be used in next

level Model

PD

GF

, PM

CA

S S

TM

s (T

o B

e A

gree

d)

2.

2.1

PD

GF

, PM

CA

S F

Ms

1.1

EUSO platformElements (from ESA)

Investigation &Development

Tests

Integration &Development

Activities

Vibration Tests &Thermal Performance

Tests

QualificationTests

InstrumentIntegration &

alignment

Mechanical &Thermal Tests

Proto-Qualification& Acceptance

InstrumentIntegr &Alignment

EUSO P/L in launchconfiguration

Mechanical Test

Perform., FunctionalChecks

EUSO P/L in On-OrbitConfiguration

Ready for Shipment

Calibr., Functional &Performance Tests &

Conducted EMC

EnvironmentalTests

Static,ModalSurvey, TV/TB Instrument Simulator

shipment for RLTFtests

tkjkljlkjlests

Equipmentelectrical models

SEM

Electrical integration &functional tests


Development Philosophy

FOCALSURFACEMODULE

PDGF (P/L ELEMENT)

PASSIVE MCAS(P/L ELEMENT)

LIDAR

BAFFLE

LID

TRUNNIONS (5x)

RADIATOR

THERMAL & DEBRISPROTECTIONS LAYERS NOT SHOWN

FRONTFRESNEL

LENS

REARFRESNEL

LENS

OC = Operational Configuration (Platform/Instrument)


Development Philosophy

LC = Launch Configuration (Platform/Carrier/Instrument)


Development Philosophy - Instrument levelEUSO Instrument

STMOverall structural and thermal model (inclusive of thermo-structural dummies of avionics, optics, EUSO P/L PDGF and PMCAS): static, modal survey, TV/TB, including cycling of LID cover/mechanism opening/closure in extreme environmental conditions , physical properties, alignment before and after environmental tests

PFMRefurbishment of STM structureComplete functional verification, there including calibrationProof testPhysical propertiesEMC conducted testsGrounding/bonding

EUSO Payload

System level on STM Model:

Vibro-Acoustic test

System level on Protoflight Model:Physical properties, including I/F requirements by Inspection (OC/LC);Radiated EMC test (OC);TB/TV (OC); Vibro-Acoustic test (OC);Modal Survey test (LC);Functional, Performance tests (OC/LC)

LC = Launch Configuration (Platform/Carrier/Instrument)OC = Operational Configuration (Platform/Instrument)


Open Areas

Instrument Review

EUSO Instrument development approach is generic and lacks visibility on equipment/subsystems specific developments.

– It is a specific activity for the next Program Phases. However some improvements can be done with the co-operation of the various developers in the near term.

Mission Review

System Electrical Model missing– Noted. Introduction to be assessed and is possible in the next Program Phases.

EMC tests at Instrument and PSE (Payload Service Electronic) level missing

– Noted. It is introduced

Proof Test of Instrument PFM missing– Point taken. If CFRP confirmed for the primary structure, proof test will be

executed on the PFM Structure Subsystem.


Open Areas

Mission Review (cont’d)

Modal Survey Test at PFM Launch configuration missing– It will be introduced

Instrument PFM must be a new structure, not a refurbishment from STM

– Noted. It depends on several aspects. A trade-off will be carried out in the future Program phases.

End-to-End verification to be performed with dedicated SCOE.– Point will be covered in the future.


EUSO INSTRUMENT - SCHEDULE OUTLINE

Assy and subsystem level qualification models. For ALS responsibility HW:o LID Assy reliability test and functional tests (extreme temperature conditions)o overall structural and thermal model (inclusive of

thermo-structural dummies of avionics, optics, EUSO P/L PDGF and PMCAS, etc...) tests

- static (protoflight level) - modal - thermal vacuum (solar fluxes simulation) in open / close configuration; - physical properties (mass, cog, fit checks etc...) - alignments and light tightness checks before and after environmental tests

System level PFM AIV process based ono refurbishment of STM structure;o lenses installation, alignment and calibration (optics responsible in optics facility) o completion of PFM integration in Alenia Spazio facilitieso complete functional verification

o phisical properties (mass, inertia, cog, fit checks etc...)o EMC tests (conducted)o alignments and light tightness checks before shipping for integration on EUSO P/Lo grounding/bonding

Instrument and Payload joint PFM AIV process based ono acoustic testo thermal vacuumo EMC tests (radiated)o functional testso alignments and light tightness checks before and after environmental testso grounding/bonding

1 ST YEAR 2ND YEAR 3RD YEAR 4TH YEAR 5TH YEAR 6TH YEARQ1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4

Preliminary Design ReviewSTMDetailed Design ReviewCritical Design ReviewPFM Instrument Level

PFM additional AIV tasks (jointly with P/L) Phase B Phase C/DQualification Review / Flight Acceptance Review

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