Time & Frequency Products

April 2014

Mechanics

• Design• Mechanisms

• Calculations• Design verification• Composites• Buckling• Dynamics

• MBS

• Explicit

• Tests• Clean room• TV chamber• Vibration, shock devices• NDT, Stress/strain measurement• Material

OutlineSSSSERENUMERENUMERENUMERENUM, a.s, a.s, a.s, a.s....

• Experiences with space applications (Locking mechanisms, HDRM, Front door of coronagraph…)

• Expert material selection

• Variant solution in case of complex assemblies

• Customer access to all key design calculations

Design - mechanismsSSSSERENUM,ERENUM,ERENUM,ERENUM, a.sa.sa.sa.s....

• Appropriate conversion of design into mathematical models

• Skilled determination of critical boundary conditions, kind of loads and analyses types in order to simulate real conditions (statics vs. dynamics, fatique, nonlinearities ...)

• Assessment of results with feasible redesign proposals

Calculations – Design verificationSSSSERENUMERENUMERENUMERENUM, a.s, a.s, a.s, a.s....

• Determination of critical parts and spots of a part or an assembly considered, using aproper criteria (Halpin-Tsai….)

• Strain and margin of safety determination

• Mathematical models verification by static, modal or vibrational tests

Calculations - CompositesSSSSERENUMERENUMERENUMERENUM, a.s, a.s, a.s, a.s....

• On case of need using nonlinear mathematical models (material and geometric nonlinearities)

• Possibility of check and tuning of nonlinear material models by tests

• Simulation of buckling and post-buckling (arc-length methods) states (arc-length methods)

Calculations – BucklingSSSSERENUM, a.s.ERENUM, a.s.ERENUM, a.s.ERENUM, a.s.

• Modal analysis (verification of Eigenfrequency and shapes is possible)

• Transient and frequency response

• Vibration analysis, responses to specified spectra (sinus, random)

• Structure shock response

Calculations – DynamicsSSSSERENUMERENUMERENUMERENUM, a.s, a.s, a.s, a.s....

• GMM, TMM model development

• Submodel quality checks and incorporation of all models into one common subsystem thermal model

• Thermal analysis (ESATAN) of all space mission load cases

• Reduced model development

Calculations – ThermalSSSSERENUMERENUMERENUMERENUM, a.s, a.s, a.s, a.s....

• Dynamic analysis of rigid and flexible parts connected with varionsjoints

• Time history of reaction forces and displacements of nodes

• Transient stress and strain fields

• Vibration analysis

• DOE + Monte Carlo methods and Optimization

Calculations – Dynamics - MBSSSSSERENUMERENUMERENUMERENUM, a.s, a.s, a.s, a.s....

• Penetrations

• Impacts

• Crashes

Calculations – Explicit Dynamics SSSSERENUMERENUMERENUMERENUM, a.s, a.s, a.s, a.s....

• Assemblage, soldering, measurement

• Thermovacuum tests are available in the clean room

• Cleanliness• Room: 100,000 • Tent: 10,000

Tests – Clean roomSSSSERENUMERENUMERENUMERENUM, a.s, a.s, a.s, a.s....

• Maximum dimensions for parts to be assembled:• Room:

• 8,5m x 3,5m x 4m or• 6m x 4,5m x 4m

• Tent:

• 1,82m x 2,1m x 2,6m

• Chamber volume:• 1m3

• Vacuum value• Less than 10-3 Pa

• Not variable

• Temperature values• Range: -60ºC ÷120ºC

• Accuracy: 0.1ºC• Rate: 1ºC/min

• Breakthrough• 10 x DSUB connector 50

pin

Tests – TV chamber SSSSERENUMERENUMERENUMERENUM, a.s, a.s, a.s, a.s....

• Maximum internal dimensions for parts to be placed into chamber:• 800mm x 800mm x 800mm

• Vibration tests• Resonance

determination • Shocks • Accident safety• Combined tests

(vibration, shocks, temperature, humidity)

• Linear acceleration • Electrodynamic

vibration and shock device:

• LDS V890-LPT900 COMBO

• TIRA S597/LS-340 • LDS V850-440 HBT600

COMBO

Tests – Vibration, shock devices SSSSERENUMERENUMERENUMERENUM, a.s, a.s, a.s, a.s....

• Standards: • EN 60068-2-57, 59, 64

• RTCA/DO-160• MIL-STD-810

• VW 80101

• Equipment:• Visual method – endoscope IW2,

IF8D2, stereomicroscope (Olympus)

• Eddy Current method – Phasec2200 (Hocking), Defectometer2.835, 2.837 (Foerster), EddyScan 30 (Nortec)

• Ultrasound and Acoustic –MasterScan 340 (Sonatest), BondMaster 1000 (Staveley)

• Acoustic Emission method –Xedo (Dakel)

• Thermo-graphic analyses – Spate 4000 (Ometron)

• Shearography and ESPI systems – Q800, Q100 (DantecDynamics)

• Liquid Penetrates – Ardrox(Chemetall)

• Optical method – Aramis (Gom)

Tests – NDT, Stress/strain

measurement SSSSERENUMERENUMERENUMERENUM, a.s, a.s, a.s, a.s....

• Standard specifications: • EN 473, ISO 9712, EN 4179, NAS-410,

SNT-TC-1A

• Approval certificates: • UT, ET -- EN 473 level 2 • VT -- EN 473 level 3, EN 4179 level 2,

NAS-410 level 2

• Coupon, panel and structural part static and fatigue testing

• Crack growth monitoring• Fracture toughness tests (K-factor, J-

integral, plastic zone, ...) • Contact corrosion tests • Hot-Wet testing • Equipment:

• Fatigue and static loading test machines MTS, Instron Schenck, Tira, Inova, Instron and Amsler up to 500 kN

• Laboratory for metallographic and fracture surfaces analysis:

• Metallographic microscope GX51 BF/DF (1000x)

• Optical microscope Olympus SZ40 (50x)

• Spectrometers BAIRD Foundrymate+ PerkinElmer

Tests – Material SSSSERENUMERENUMERENUMERENUM, , , , aaaa.s.s.s.s....

• Nanosatellites (2013-now) – Cubesat development

• PROBA3 (2012-now) - Front door assembly design of Optical Objective Assembly for ASPIICS coronagraph

• FLUTTER (2011-2012) – Flutter calculations and wind tunnel experiments on aeroelastic models an correlation with flutter calculations on full scale part

• SWARM (2005 -2011) - Three flight units of capacitive microaccelerometer including ground segment equipment were developed and delivered for three satellites of SWARM mission.

ReferencesSSSSERENUM,ERENUM,ERENUM,ERENUM,a.sa.sa.sa.s.