1 themis-scm thm-scm-cdr – 2004.04.08bertrand delaporte thm – scm – cdr – 08-april-2004 in...

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THEMIS-SCM

THM-SCM-CDR – 2004.04.08Bertrand delaPorte

THM – SCM – CDR – 08-April-2004 in Velizy

• Test and Calibration Plan

• I&T Plans prior to shipment to UCB

• EGSE Design

• I&T and Spacecraft Integration Plans

• Implementation Schedule

2THM-SCM-CDR – 2004.04.08

THEMIS-SCM

SCM VERIFICATION – TEST MATRIX

PA SC PA SC+PA SC PA SC+PA

Electrical Verification X X X X X X X

Full Calibration X X

Thermal Test X X X X

Metrology (i/f, mass, CoG) (1) X X X X

Vibration QUALIF X X

Therm Vac QUALIF X

Vibration ACCEPT X X

Pre-Integration IDPU X

Integration in spacecraft X X X X

I/f model

EM FM1 to FM6

Bertrand delaPorte(1) : is the M.o.I. requested ?

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THEMIS-SCM


After winding of the internal tube

Impedance verification done

After potting of the magnetic core

Impedance verification

Magnetic flux response, with PA

done

done

After overall potting Impedance verification

Magnetic flux response, with PA

soon

After 3 axis assembly, with associated PA

Transfer function, SC in mm-box

Metrology, Vibrations

Temperature limits

Full Calibration in Chambon

After delivery to UCB Thermal vacuum (EM only ?)

I&T plans prior to delivery – SCM – SC (Sensor)

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THEMIS-SCM


Single flex Electrical verification

Offset adjustment

done

done

After cubes assembly and potting

Electrical verification

Temperature test (-40 +65)

done

done

I&T plans prior to delivery – SCM – PA 3D+ cubes

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THEMIS-SCM


After PCB cabling Electrical verification soon

After assembly in the housing

Electrical verification

Metrology, Vibrations

Full range Temperature Test

With associated SC Transfer function, SC in mm-box

Full Calibration in Chambon

After delivery to UCB Thermal vacuum (EM only ?)

I&T plans prior to delivery – SCM – full PA

6THM-SCM-CDR – 2004.04.08

THEMIS-SCM

SCM - EGSE

For Bench Test :

• mu-metal box (to put the sensor inside) – one only ?

• EGSE Interface Box (to be plugged to the PA)

• Power Supply +/-10V, Signal Generator, Oscilloscope, multimeters

For Integration in the spacecraft

• mu-metal box

• Signal Generator

• Portable PC + dedicated software, to be connected to the Themis acquisition system (in a LAN or via Internet)

Bertrand delaPorte

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THEMIS-SCM


SCM Bench Test Configuration

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THEMIS-SCM

THM-SCM-CDR – 2004.04.08

MAGNETIC CALIBRATION STATION – CHAMBON LA FORET

Bertrand delaPorte

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THEMIS-SCM


I&T AND SPACECRAFT INTEGRATION PLAN

1. Pre-intégration SCM – IDPU (DFB)

2. Integration to the spacecraft

10THM-SCM-CDR – 2004.04.08

THEMIS-SCM

1. Pre-Integration with IDPU

An « Interface Model » of the Pre-Amp will be provided for that purpose

• Same Power, Command, analog output interfaces

• Power and Cal Mode identification by led

• Cal Signal re-injected to the input

• A signal generator can be connected to each input

Validation can only be done by analysis of the telemetry data (tbd)

Bertrand delaPorte


11THM-SCM-CDR – 2004.04.08

THEMIS-SCM

2. Integration in the spacecraft

• Delivery (Incoming Inspection, Bench Test)

• Mechanical Integration of the PA, connection to the boom harness

• Sensor in the mu-metal box, connection to the boom harness

• Electrical Integration (bounding, isolation, dangerous voltage)

• Power ON and functionnal Test

Validation can only be done by analysis of the telemetry data (tbd)

Bertrand delaPorte


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THEMIS-SCM


Extended cable 1.5 m

Antenna in the mu-metal box

pre-amp

SCM – INTEGRATION IN THE SPACECRAFT

Initial configuration

The sensor is inside the mu-metal box, connected to the PA via the boom harness

Requirement: to keep the sensor in the mu-metal box until all experiments are integrated in the spacecraft (mission operation test)

Question: what is performed in UCB, and what is done in Swales ?

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THEMIS-SCM


SCM

Mu-metal box

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THEMIS-SCM



WHAT CAN BE DONE WITH THE SENSOR IN THE MU-METAL BOX

• axis identification

• re-verification of the end-to-end calibration

• Phase relation within the 3 components (for the waveforms)

• check of the conducted noise

• SCM/EField timing reference [and inter-calibration] (tbd)

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THEMIS-SCM



SENSOR MOUNTED ON THE BOOM

• PA saturated by the 50/60 Hz

except in a quite site (i.e. Chambon), or in an EMC chamber

• No measurement possible but a big failure would be seen

INSTALLATION OF THE MLI - by UCB when ?

16THM-SCM-PDR – 2003.10.10

THEMIS-SCM

SCM – INTEGRATION – QUICK TESTS WITH HOUSEKEEPING

A few Housekeeping are needed to check the experiment rapidly (if possible in real time) during the ground tests and in the commissioning.

HOUSEKEEPING FOR SCM:

• SCM-PWR-STATUS ( 1 bit )

• SCM-CAL-STATUS ( 1 bit )

• SCM-VOLT-MONITOR ( 8 bits )

• SCM-MEAN-VAL-BX, __BY, __BZ ( 16 or 8 bits )

Mean average of |Bi| over one TM format (similar to r.m.s. value)

Bertrand delaPorte

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THEMIS-SCM


AC MAGNETIC NOISE VERIFICATION

In the low frequency range (< 4 kHz), the main sources of AC noise are

• The beating within several higher frequencies, especially the DC/DC Converters if they are not synchronised. It can be conducted and/or radiated.

• The solar pannels (cannot be verified on the ground)

The CETP can help to analyse the AC radiated noise around the spacecraft. A « magnetic sniffer » has been designed and built for that purpose. In order to avoid the saturation by the 50/60 Hz, the analysis is separated into two bandwidths: below 50 Hz and above 300 Hz (5th harmonic)

18THM-SCM-CDR – 2004.04.08

THEMIS-SCM

SCM INTEGRATION – TEAM SUPPORT

The SCM team will support all critical activities of the integrations.

However, due to the large number of satellites, a strategy must be imagined to limit the number of travels, the cost and the time spent

The EM integration will be supported

The FM will be delivered 3 by 3 and the level of support for each test will be agreed with UCB

Capability of remote supporting should be implemented

Bertrand delaPorte

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THEMIS-SCM

THM-SCM-CDR – 2004.04.08

EXAMPLE OF REAL TIME SUPPORT

Bertrand delaPorte

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THEMIS-SCM


SCM SCHEDULE – KEY DATES

EM delivery to UCB for TV 31-May-2004

EM available for integration in UCB 11-Jun-2004

FM 3D cubes delivered to CETP 23-Jul-2004

FM-1,2,3 available (without TV) 24-Sep-2004

FM-4,5,6 available (without TV) 10-Nov-2004

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THEMIS-SCM


1 themis-scm thm-scm-cdr – 2004.04.08bertrand delaporte thm – scm – cdr – 08-april-2004 in...

Documents

bertrand delaportethm

delivery scm pa

bertrand delaporteit

multimetersfor integration

chambonafter delivery

egsefor bench test

velizy test

themis acquisition system