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Precision Filter Radiometer SOVIM Observatory Davos World Radiation CenterSafety Workshop 6&7 Feb. 03 ESTEC SOVIM Presentation 1.Structures 1.Description.

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Presentation on theme: "Precision Filter Radiometer SOVIM Observatory Davos World Radiation CenterSafety Workshop 6&7 Feb. 03 ESTEC SOVIM Presentation 1.Structures 1.Description."— Presentation transcript:

1 Precision Filter Radiometer SOVIM Observatory Davos World Radiation CenterSafety Workshop 6&7 Feb. 03 ESTEC SOVIM Presentation 1.Structures 1.Description Structural Subsystem 2.Verification (FEM, Vibr, Analysis) 2.Pressurized System (n.a. SOVIM) 3.Material flammability, toxicity and compatibility 1.List of toxic materials (n.a.) 2.Final materials compatibility status (n.a.) 3.Material List 4.Non-ionizing radiation 5.Electrical subsystem 1.Power distribution schematics 2.Verification 6.Avionics Control 1.Schematics of safety critical subsystems 2.Summary of test results etc. 7.Mechanism in critical application 1.Summary of all mechanism 2.Reports of verification etc. 8.Batteries (n.a.) 9.Sealed Containers (n.a.)

2 Precision Filter Radiometer SOVIM Observatory Davos World Radiation Center Safety Workshop 6&7 Feb. 03 ESTEC 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 1.1 Package

3 Precision Filter Radiometer SOVIM Observatory Davos World Radiation Center Safety Workshop 6&7 Feb. 03 ESTEC 1.1 Package Connector flange Instrument Slots Mounting Feet

4 Precision Filter Radiometer SOVIM Observatory Davos World Radiation Center Safety Workshop 6&7 Feb. 03 ESTEC 1.1 PMO6-V Radiometer 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 (the only rotating mass on Radiometer 3.6g) Shutter Acutator Printed Circuit Boards Precision Aperture Muffler Hall Elements Cavity Connector

5 Precision Filter Radiometer SOVIM Observatory Davos World Radiation Center Safety Workshop 6&7 Feb. 03 ESTEC 1.1 PMO6-R Radiometer The R-type is very similar to the V-Type and is an EURECA reflight instrument.

6 Precision Filter Radiometer SOVIM Observatory Davos World Radiation Center Safety Workshop 6&7 Feb. 03 ESTEC 1.1 Sunphotometer Printed Circuit Boards Connector Purging stub Precision Aperture Glass Filters Photo Diode 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!

7 Precision Filter Radiometer SOVIM Observatory Davos World Radiation Center Safety Workshop 6&7 Feb. 03 ESTEC 1.1 Two Axis Sun Sensor The SOVIM flight TASS is the flight TASS of EURECA. Linear CCD‘s Connector Slit Aperture PCB‘s not shown Quartz Protective Window

8 Precision Filter Radiometer SOVIM Observatory Davos World Radiation Center Safety Workshop 6&7 Feb. 03 ESTEC 1.1 DIARAD Sensor and Electronics The DIARAD is also an „EURECA reflight“ instrument, with a few modifications. Shutter Wheels

9 Precision Filter Radiometer SOVIM Observatory Davos World Radiation Center Safety Workshop 6&7 Feb. 03 ESTEC 1.1 Sun-Shield View from sun-side Covered with BSM View from package side

10 Precision Filter Radiometer SOVIM Observatory Davos World Radiation Center Safety Workshop 6&7 Feb. 03 ESTEC 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“

11 SOVIM Observatory Davos World Radiation Center Safety Workshop 6&7 Feb. 03 ESTEC 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

12 Precision Filter Radiometer SOVIM Observatory Davos World Radiation Center Safety Workshop 6&7 Feb. 03 ESTEC 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”.

13 Precision Filter Radiometer SOVIM Observatory Davos World Radiation Center Safety Workshop 6&7 Feb. 03 ESTEC 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.

14 Precision Filter Radiometer SOVIM 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 Center Safety Workshop 6&7 Feb. 03 ESTEC

15 Precision Filter Radiometer SOVIM Observatory Davos World Radiation Center Safety Workshop 6&7 Feb. 03 ESTEC 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

16 Precision Filter Radiometer SOVIM Observatory Davos World Radiation Center Safety Workshop 6&7 Feb. 03 ESTEC 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

17 Precision Filter Radiometer SOVIM Observatory Davos World Radiation Center Safety Workshop 6&7 Feb. 03 ESTEC 5 Electrical subsystems

18 Precision Filter Radiometer SOVIM Observatory Davos World Radiation Center Safety Workshop 6&7 Feb. 03 ESTEC 5.1 Overall power distribution

19 Precision Filter Radiometer SOVIM Observatory Davos World Radiation Center Safety Workshop 6&7 Feb. 03 ESTEC 5.1 Main power switches and inrush current limiter

20 Precision Filter Radiometer SOVIM Observatory Davos World Radiation Center Safety Workshop 6&7 Feb. 03 ESTEC 5.1 Schematics : Electrical fuse and inrush current limiter Inrush current limiterElectr. Fuse

21 Precision Filter Radiometer SOVIM Observatory Davos World Radiation Center Safety Workshop 6&7 Feb. 03 ESTEC 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

22 Precision Filter Radiometer SOVIM Observatory Davos World Radiation Center Safety Workshop 6&7 Feb. 03 ESTEC 5.1 Schematics : EURECA reflight DC/DC One of four DC/DC groups

23 Precision Filter Radiometer SOVIM Observatory Davos World Radiation Center Safety Workshop 6&7 Feb. 03 ESTEC 5.1 EURECA reflight DC/DC +5V-8V+8V+13V

24 Precision Filter Radiometer SOVIM Observatory Davos World Radiation Center Safety Workshop 6&7 Feb. 03 ESTEC 5.1 DPU power interface circuits

25 Precision Filter Radiometer SOVIM Observatory Davos World Radiation Center Safety Workshop 6&7 Feb. 03 ESTEC 5.1 Voltage to Frequency Converters 14 VFC channels Heater drivers Housekeeping multiplexers ASIC Current sensor Power switches Connector harness

26 Precision Filter Radiometer SOVIM Observatory Davos World Radiation Center Safety Workshop 6&7 Feb. 03 ESTEC 5.1 Cover Driver PCB Hall element driver Harness to VFC One of five cover driver-stage

27 Precision Filter Radiometer SOVIM Observatory Davos World Radiation Center Safety Workshop 6&7 Feb. 03 ESTEC 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

28 Precision Filter Radiometer SOVIM Observatory Davos World Radiation Center Safety Workshop 6&7 Feb. 03 ESTEC 6 Avionics Control n.a.

29 Precision Filter Radiometer SOVIM Observatory Davos World Radiation Center Safety Workshop 6&7 Feb. 03 ESTEC 7 Mechanism in critical application

30 SOVIM Observatory Davos World Radiation Center Safety Workshop 6&7 Feb. 03 ESTEC 7.1 COVER Mechanism The whole „Cover“ consist of five individual identical cover mechanism. All five Covers are mounted on the cover plate. Step Motor Locking Pin Moving mass 0.9 g Linear Actuator Cover (rotating mass 6.9 g) Back Surface Mirror (mass 0.4g) Hall Elements End Stops Cover Plate TASS quartz window is covered with two slit apertures of 5 x 17.5mm size. The locking pin is to hold the cover during launch and reentry in position, to protect the sensitive surfaces against contamination.

31 Precision Filter Radiometer SOVIM Observatory Davos World Radiation Center Safety Workshop 6&7 Feb. 03 ESTEC 7.1 Cover Mechanism Diarad openings Single cover without BSM End stops Motor axle Cover Mechanism view from the sun-direction Cover Plate Locking pin TASS openings without quartz window

32 Precision Filter Radiometer SOVIM Observatory Davos World Radiation Center Safety Workshop 6&7 Feb. 03 ESTEC 7.1 Radiometer Shutter Mechanism 90° Actuator Shutter covered with BSM (3.6 gr.) Position sensing PCB

33 Precision Filter Radiometer SOVIM Observatory Davos World Radiation Center Safety Workshop 6&7 Feb. 03 ESTEC 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

34 Precision Filter Radiometer SOVIM Observatory Davos World Radiation Center Safety Workshop 6&7 Feb. 03 ESTEC 8 Batteries SOVIM does not contains any batteries or elctrolytic capacitors.

35 Precision Filter Radiometer SOVIM Observatory Davos World Radiation Center Safety Workshop 6&7 Feb. 03 ESTEC 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....

36 Precision Filter Radiometer SOVIM Observatory Davos World Radiation Center Safety Workshop 6&7 Feb. 03 ESTEC

37 Precision Filter Radiometer SOVIM Observatory Davos World Radiation Center Safety Workshop 6&7 Feb. 03 ESTEC

38 Precision Filter Radiometer SOVIM Observatory Davos World Radiation Center Safety Workshop 6&7 Feb. 03 ESTEC

39 Precision Filter Radiometer SOVIM Observatory Davos World Radiation Center Safety Workshop 6&7 Feb. 03 ESTEC

40 Precision Filter Radiometer SOVIM Observatory Davos World Radiation Center Safety Workshop 6&7 Feb. 03 ESTEC

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