Precision filter radiometer
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SOVIM. Precision Filter Radiometer. SOVIM Presentation Structures Description Structural Subsystem Verification (FEM, Vibr, Analysis) Pressurized System (n.a. SOVIM) Material flammability, toxicity and compatibility List of toxic materials (n.a.)

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Precision Filter Radiometer

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Precision filter radiometer

SOVIM

Precision Filter Radiometer

  • SOVIM Presentation

  • Structures

    • Description Structural Subsystem

    • Verification (FEM, Vibr, Analysis)

  • Pressurized System (n.a. SOVIM)

  • Material flammability, toxicity and compatibility

    • List of toxic materials (n.a.)

    • Final materials compatibility status (n.a.)

    • Material List

  • Non-ionizing radiation

  • Electrical subsystem

    • Power distribution schematics

    • Verification

  • Avionics Control

    • Schematics of safety critical subsystems

    • Summary of test results etc.

  • Mechanism in critical application

    • Summary of all mechanism

    • Reports of verification etc.

  • Batteries (n.a.)

  • Sealed Containers (n.a.)

Observatory Davos World Radiation CenterSafety Workshop 6&7 Feb. 03 ESTEC


Precision filter radiometer

SOVIM

Precision Filter Radiometer

1.1 Package

2 Valves

DPU

2 Sunphotom.

3 Radiometers

TASS (black)

Heatsink

Thermal Washer

Sun Shield

DIARAD Electronics

2 Valves

Cover Plate

(Cover Mechanism

not shown)

DIARAD Sensor

Not shown:

Cover mechanism

DC/DC, all PCB‘s

Observatory Davos World Radiation CenterSafety Workshop 6&7 Feb. 03 ESTEC


Precision filter radiometer

SOVIM

Precision Filter Radiometer

1.1 Package

Connector flange

Instrument Slots

Mounting Feet

Observatory Davos World Radiation CenterSafety Workshop 6&7 Feb. 03 ESTEC


Precision filter radiometer

SOVIM

Precision Filter Radiometer

1.1 PMO6-V Radiometer

Hall Elements

SOVIM has three PMO6

Radiometer integrated. Two are PMO6V types, one is an older PMO6R type. The V-type is the same as we flown on SOHO, the R-type is the same as on SOVA.

Safety critical parts: Nothing!

Shutter Acutator

Shutter

(the only rotating mass on Radiometer 3.6g)

Printed Circuit

Boards

Muffler

Precision Aperture

Cavity

Connector

Observatory Davos World Radiation CenterSafety Workshop 6&7 Feb. 03 ESTEC


Precision filter radiometer

SOVIM

Precision Filter Radiometer

1.1 PMO6-R Radiometer

The R-type is very similar to the V-Type and is an EURECA reflight instrument.

Observatory Davos World Radiation CenterSafety Workshop 6&7 Feb. 03 ESTEC


Precision filter radiometer

SOVIM

Precision Filter Radiometer

1.1 Sunphotometer

Printed Circuit

Boards

Purging stub

SOVIM has two three channel SPM integrated. This SPM is more or less the same as we flown on EURECA.

Safety critical:

Glass filters. This small piece of glass is wraped on all side. In front is the precision aperture with a diameter of 2mm!

Connector

Photo Diode

Glass Filters

Precision Aperture

Observatory Davos World Radiation CenterSafety Workshop 6&7 Feb. 03 ESTEC


Precision filter radiometer

SOVIM

Precision Filter Radiometer

1.1 Two Axis Sun Sensor

Linear CCD‘s

Connector

Slit Aperture

PCB‘s not shown

The SOVIM flight TASS is the flight TASS of EURECA.

Quartz Protective Window

Observatory Davos World Radiation CenterSafety Workshop 6&7 Feb. 03 ESTEC


Precision filter radiometer

SOVIM

Precision Filter Radiometer

1.1 DIARAD Sensor and Electronics

Shutter Wheels

The DIARAD is also an „EURECA reflight“ instrument, with a few modifications.

Observatory Davos World Radiation CenterSafety Workshop 6&7 Feb. 03 ESTEC


Precision filter radiometer

SOVIM

Precision Filter Radiometer

1.1 Sun-Shield

View from package side

View from sun-side

Covered with BSM

Observatory Davos World Radiation CenterSafety Workshop 6&7 Feb. 03 ESTEC


Precision filter radiometer

SOVIM

Precision Filter Radiometer

1.1 DPU

UIM 3

User Interface Module 3

UIM 2

User Interface Module 2

UIM 1

User Interface Module 1

CPU

Central Processing Unit

SIM

Space Craft Interface Module

TIM

Timing Module

EURECA „reflight DPU“

Observatory Davos World Radiation CenterSafety Workshop 6&7 Feb. 03 ESTEC


Precision filter radiometer

SOVIM

1.2 Sovim Instrument FEM Analysis Report

Conclusions of FEM (SOV-CSZ-RP-1001 / 18.12.02)

The drawings at PMOD are updated with all modifications proposed by CSAG. The results from the final analyses presented in section 6 (Analysis Results) show that the optimised SOVIM Package design is sound. The first frequency of vibration is above 220Hz.

The results from the simple stress analysis presented in section 6.2.2 (Results from Static Analysis) show, that no obvious stress problems exist with the present design.

Mode Shapes of Modal Analysis for optimised Sovim Package

Observatory Davos World Radiation CenterSafety Workshop 6&7 Feb. 03 ESTEC


Precision filter radiometer

SOVIM

Precision Filter Radiometer

1.2 Structural Verifaction

  • In parallel with the mechanical design, a structural analysis (FEM) has been done to asses strength compliance and dynamic behavior (first resonance frequency). See Contraves document SOV-CSZ-RP-1001, Issue 3, 18/12/2002.

  • Validation of the FEM model and confirmation of compliance shall be done through vibration-testing on the PFM at acceptance test level.

  • Structural design shall be based on fracture control principles and procedure. See IIRD document “SOVIM-PMO-PQA/G-109”.

Observatory Davos World Radiation CenterSafety Workshop 6&7 Feb. 03 ESTEC


Precision filter radiometer

SOVIM

Precision Filter Radiometer

2 Pressurized System

SOVIM does not contain any pressurized systems

or subsystems.

All internal boxes and instruments have holes to be

adequately vented.

The Sensor Package is vented trough three pairs of in/out valves,

and in the case of DIARAD trough its openings in the cover plate.

Observatory Davos World Radiation CenterSafety Workshop 6&7 Feb. 03 ESTEC


Precision filter radiometer

SOVIM

Precision Filter Radiometer

2.1 Valves

The design is as for EURECA, SOVA and was space qualified (see:SOVIM-PMO-VER/G-002). The pressure difference to activate the valve is set to ±50hPa, which is individually tested for each valve.

The EURECA breathe out valves

Observatory Davos World Radiation CenterSafety Workshop 6&7 Feb. 03 ESTEC


Precision filter radiometer

SOVIM

Precision Filter Radiometer

3 Material flammability, toxicity and compatibility

3.1 List of toxic materials

SOVIM does not contain any toxic materials. All the materials used are listed in the DML and DCL.

3.2 Final materials compatibility List

3.3 Material List

DML:SOVIM-PMO-PQA/G-102

DCL:SOVIM-PMO-PQA/G-103

Observatory Davos World Radiation CenterSafety Workshop 6&7 Feb. 03 ESTEC


Precision filter radiometer

SOVIM

Precision Filter Radiometer

4 Non-ionizing radiation

  • SOVIM has one source of non-ionizing radiation: The three DC/DC converters. This sub-units are re-flight units, already used on ESA-EURECA and was successfully tested at ESA/ESTEC Testcenter Noordwijk (NL) according to the requirements: EURECA Electromagnetic Compatibility and Power Quality Specification” SPE 1200 604.

  • Experiment EMC/EMI tests foreseen at ESTEC spring 2003

Observatory Davos World Radiation CenterSafety Workshop 6&7 Feb. 03 ESTEC


Precision filter radiometer

SOVIM

Precision Filter Radiometer

5 Electrical subsystems

Observatory Davos World Radiation CenterSafety Workshop 6&7 Feb. 03 ESTEC


Precision filter radiometer

SOVIM

Precision Filter Radiometer

5.1

Overall

power

distribution

Observatory Davos World Radiation CenterSafety Workshop 6&7 Feb. 03 ESTEC


Precision filter radiometer

SOVIM

Precision Filter Radiometer

5.1

Main power switches and inrush current limiter

Observatory Davos World Radiation CenterSafety Workshop 6&7 Feb. 03 ESTEC


Precision filter radiometer

SOVIM

Precision Filter Radiometer

5.1 Schematics : Electrical fuse and inrush current limiter

Electr. Fuse

Inrush current limiter

Observatory Davos World Radiation CenterSafety Workshop 6&7 Feb. 03 ESTEC


Precision filter radiometer

SOVIM

Precision Filter Radiometer

5.1 EURECA reflight main power switch groups

One complete group including a relay, over-current measurement and a secundary inrush current limiter

Primary inrush current limiter

Main current measurement

Observatory Davos World Radiation CenterSafety Workshop 6&7 Feb. 03 ESTEC


Precision filter radiometer

SOVIM

Precision Filter Radiometer

5.1 Schematics : EURECA reflight DC/DC

One of four DC/DC groups

Observatory Davos World Radiation CenterSafety Workshop 6&7 Feb. 03 ESTEC


Precision filter radiometer

SOVIM

Precision Filter Radiometer

5.1 EURECA reflight DC/DC

+5V

-8V

+8V

+13V

Observatory Davos World Radiation CenterSafety Workshop 6&7 Feb. 03 ESTEC


Precision filter radiometer

SOVIM

Precision Filter Radiometer

5.1 DPU power interface circuits

Observatory Davos World Radiation CenterSafety Workshop 6&7 Feb. 03 ESTEC


Precision filter radiometer

SOVIM

Precision Filter Radiometer

5.1 Voltage to Frequency Converters

14 VFC channels

Heater drivers

Housekeeping multiplexers

ASIC

Current sensor

Power switches

Connector harness

Observatory Davos World Radiation CenterSafety Workshop 6&7 Feb. 03 ESTEC


Precision filter radiometer

SOVIM

Precision Filter Radiometer

5.1 Cover Driver PCB

Hall element driver

Harness to VFC

One of five cover driver-stage

Observatory Davos World Radiation CenterSafety Workshop 6&7 Feb. 03 ESTEC


Precision filter radiometer

SOVIM

Precision Filter Radiometer

6 Verification Electrical Subsystems

  • Prototyping and testing of all subunits before start of manufacturing of flight units

  • Detailed design review of all subunits

  • FMECA

  • Measurement of electrical signal levels at min/max condition

  • Measurement of timing range compatibility at min/max condition

  • Thermal environment test

  • Functional test

  • Data I/F is tested with “Electrical Software Simulator” at ALENIA

Observatory Davos World Radiation CenterSafety Workshop 6&7 Feb. 03 ESTEC


Precision filter radiometer

SOVIM

Precision Filter Radiometer

6 Avionics Control

n.a.

Observatory Davos World Radiation CenterSafety Workshop 6&7 Feb. 03 ESTEC


Precision filter radiometer

SOVIM

Precision Filter Radiometer

7 Mechanism in critical application

Observatory Davos World Radiation CenterSafety Workshop 6&7 Feb. 03 ESTEC


Precision filter radiometer

SOVIM

7.1 COVER Mechanism

Back Surface Mirror

(mass 0.4g)

Cover Plate

Cover

(rotating mass 6.9 g)

TASS quartz window is covered with two slit apertures of 5 x 17.5mm size.

Locking Pin

Moving mass 0.9 g

End Stops

Hall Elements

Step Motor

Linear Actuator

The whole „Cover“ consist of five individual

identical cover mechanism. All five Covers

are mounted on the cover plate.

The locking pin is to hold the cover during launch and reentry in position, to protect the sensitive surfaces against contamination.

Observatory Davos World Radiation CenterSafety Workshop 6&7 Feb. 03 ESTEC


Precision filter radiometer

SOVIM

Precision Filter Radiometer

7.1 Cover Mechanism

Single cover

without BSM

Motor axle

Cover Plate

Locking pin

End stops

Diarad openings

TASS openings

without quartz window

Cover Mechanism view from the sun-direction

Observatory Davos World Radiation CenterSafety Workshop 6&7 Feb. 03 ESTEC


Precision filter radiometer

SOVIM

Precision Filter Radiometer

7.1 Radiometer Shutter Mechanism

90° Actuator

Shutter covered with BSM

(3.6 gr.)

Position sensing PCB

Observatory Davos World Radiation CenterSafety Workshop 6&7 Feb. 03 ESTEC


Precision filter radiometer

SOVIM

Precision Filter Radiometer

7.2 Reports of mechanism verification

  • Reports of mechanism verifications will be delivered at IFDR and with PFM-H/W acceptance data package at delivery.

  • Already done are the following verifications :

  • Cover qualification tests

  • Cover life test

  • PMO6-V shutter life test

  • DIARAD shutter life test

Observatory Davos World Radiation CenterSafety Workshop 6&7 Feb. 03 ESTEC


Precision filter radiometer

SOVIM

Precision Filter Radiometer

8 Batteries

SOVIM does not contains any batteries or elctrolytic capacitors.

Observatory Davos World Radiation CenterSafety Workshop 6&7 Feb. 03 ESTEC


Precision filter radiometer

SOVIM

Precision Filter Radiometer

9 Sealed Containers

SOVIM does not contain any sealed containers.

Please refer also to point 2 : Pressurized System.

... internal boxes and instruments have holes to be

adequately vented....

Observatory Davos World Radiation CenterSafety Workshop 6&7 Feb. 03 ESTEC


Precision filter radiometer

SOVIM

Precision Filter Radiometer

Observatory Davos World Radiation CenterSafety Workshop 6&7 Feb. 03 ESTEC


Precision filter radiometer

SOVIM

Precision Filter Radiometer

Observatory Davos World Radiation CenterSafety Workshop 6&7 Feb. 03 ESTEC


Precision filter radiometer

SOVIM

Precision Filter Radiometer

Observatory Davos World Radiation CenterSafety Workshop 6&7 Feb. 03 ESTEC


Precision filter radiometer

SOVIM

Precision Filter Radiometer

Observatory Davos World Radiation CenterSafety Workshop 6&7 Feb. 03 ESTEC


Precision filter radiometer

SOVIM

Precision Filter Radiometer

Observatory Davos World Radiation CenterSafety Workshop 6&7 Feb. 03 ESTEC


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