thales ndia briefing · thales ndia briefing hard target reliability for mafis l.j.turner ceng...

Thales Missile ElectronicsTHALES MISSILE ELECTRONICS LIMITED

THALES NDIA Briefing

Hard Target Reliability for MAFISL.J.Turner CEng MIMechE.

Ordnance Fuzing Group Manager

Thales Missile Electronics2

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THALES MISSILE ELECTRONICS LIMITED

Company Background in Fuzing & Shock Hardening

1918 - Shell Fuzing1940s - Airborne Radar, Shell Fuzing,

Proximity Fuzing (Rockets)Bomb Fuze for “Bouncing Bomb” etc.

1950s - Naval Proximity Shell Fuzing1960s - No.907 RF Proximity Fuze for Bombs.1970s - No.952 RF Proximity Fuze for Bombs.

Multi Role Shell Fuze (MRF)1980s - SG357 Runway Cratering Weapon

MFBF (No.960) Multi-Function Bomb Fuze1990s - Intelligent Hard Target Fuzing Research2000s - Intelligent Hard Target Fuzing Production

and Research, MAFIS, HTSF & AURORA.

Pioneer in hardened fuze electronics


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TME Fuzing Family Tree

FIBDID

MEHTF

STRIFEIF research since 1995

PSFT

AURORA

MFBF

StormShadow

MAFIS

JSOW

HTSF

HARDBUT


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TME Hard Target Fuzing

MFBF

MAFIS forStorm Shadow & JSOW

AURORAfor

PGB (Paveway IV)

MEHTF & PSFT


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MAFIS (Multi Application Fuze Initiation System)

Modular 3” fuzeShock hardened core electronicsApplication specific interface module

High shock survivable for MWSOut-of-Line arming systemMissile fuze (including reliability requirements)Initially developed for Storm Shadow with BROACH warheadModularity permits ready adaptation to other applicationsIn full production for:

Raytheon AGM-154C (JSOW)MBDA Storm Shadow


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MAFIS (FSU-26/B) in JSOW (AGM-154C)


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Detonator Alignment andSafety Module (DASM)

Core Electronics Module (CEM) Application Specific InterfaceModule (ASIM)

Housing

MAFIS for JSOW


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Reliability in High “g” Domain

Hard Target Fuzing

Severe Environment for survivable electro-mechanics

Multiple shock effectsHigh “g” levelsMultiple ImpulsesWeapon Attack Angles & Angle of attack

Fuze x 3 Axis – Longitudinal and LateralFrequency range

Excitation levels within fuzeAll over Temperature Extremes

Real impact data difficult to collectEven more difficult to replicate for test


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TME Shock Test Methodology

Target impact time signature

Candidate equivalent shock time signature

HydrocodeCFD modelling

Trials or modelling

PC/AC shock time signature

Composite shock time signature Spectral

analysis Compare

HydrocodeCFD modelling

Spectral analysis

Compare HydrocodeCFD modelling

Similar SRS?

Similar strain levels?Physical trial Compare Physical trial

Similar damage?


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Trials / Evaluation Approach

ComputationalFluid Dynamics Simulation

Catapult TrialsSled Trials

Advantages

Disadvantages

•Inexpensive•Repeatable•Rapid

•Difficult to Validate•Easy to misinterpret the results

•All up round physical test

•Closely replicate the tactical environment

•Inexpensive•Repeatable•Rapid•Adjustable shock environment•Temperature Extremes

•Expensive•Non-Repeatable•Infrequent•Ambient Temp

•Requires Validation


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Basis for SRS Analysis and Test

Shock Response Spectrum

Applicable for material transient responses with complicated waveforms

Enables the tailoring of shock exitations from actual data for the operational environment

Proven technique for shock simulation testing of complex waveforms

Identified in UK (DEF STAN 00-35) and US standards (MIL-STD-810)

Purpose of test to demonstrate the adequacy of material to resist degradation of functional / structural performance

SRS MAXI-MAX - Catapult, Longitudinal, 80 k g

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1000000

10 100 1000 10000 100000

Frequency (Hz)

Peak

Acc

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n (g

)

Q = 10fn[0] = 20 Hzsr = 200 kHz


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Typical Sled Trial Signatures

Time History – Typical Sled Trial - X axis

-150000

-100000

-50000

0

50000

100000

150000

0.000000 0.000500 0.001000 0.001500 0.002000

Time (seconds)

Acc

eler

ation

(g)

Time History – Typical Sled Trial - Z axis

-60000

-40000

-20000

0

20000

40000

60000

80000

100000

0.000000 0.000500 0.001000 0.001500 0.002000

Time (seconds)

Acc

eler

ation

(g)

SRS - Sled Trial

100

1000

10000

100000

1000000

10 100 1000 10000 100000

Frequency (Hz)

Peak

Acc

eler

atio

n (g

)

X axis Z axis

Q = 10fn[0] = 20 Hzsr = 200 kHz


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Typical CFD Simulations

CFD Model construction can affect simulation

SRS MAXI-MAX - SIMULATION 3.29 X and Z axes

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Frequency (Hz)

Peak

Acc

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)

X axis Z axis

Q = 10fn[0] = 20 Hzsr = 200 kHz

Time History - Simulation 3.29, z axis

-80000

-60000

-40000

-20000

0

20000

40000

60000

80000

0.002 0.004 0.006 0.008 0.01 0.012

Time (s)

Acc

eler

atio

n (g

)

Time History - Simulation 3.29, x axis

-80000

-60000

-40000

-20000

0

20000

40000

60000

80000

0.002 0.004 0.006 0.008 0.01 0.012

Time (s)

Acc

eler

atio

n (g

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Typical Catapult Trials DataTime History - Catapult, Longitudinal, 80k g (nominal)

-4.00E+04

-2.00E+04

0.00E+00

2.00E+04

4.00E+04

6.00E+04

8.00E+04

1.00E+05

0.0000 0.0005 0.0010 0.0015 0.0020 0.0025 0.0030

Time (seconds)

Acc

eler

ation

(g)

SRS MAXI-MAX - Catapult, Longitudinal, 80 k g

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1000000

10 100 1000 10000 100000

Frequency (Hz)

Peak

Acc

eler

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n (g

)

Q = 10fn[0] = 20 Hzsr = 200 kHz


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Sled / CFD / Catapult ComparisonSRS MAXI-MAX - Composite Sled, Simulation & Catapult

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100 1000 10000 100000

Frequency (Hz)

Peak

Acc

eler

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n (g

)

Simulation - X Simulation - Z Sled - X Sled - Z Catapult - Longitudinal

Q = 10fn[0] = 20 Hzsr = 200 kHz


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Achieving comparable damage

Sled Trial Damage Catapult Test Damage


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FractureFracture

Damage to silicon component die


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Catapult & Shock / Counter Shock Test Facilities

Selected for capability to generate comparable SRS levels

Creates ‘equivalent damage’

Quick testing turnaround

Multiple Test configurations

Longitudinal

Predominately axial shock application – Multiple impacts

Variable shock parameters – “g” x Duration

Selectable Fuze roll orientation

Temperature extremes

Lateral

As above plus simultaneous lateral and axial shock application – Multiple impacts


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Testing for Survival and Function – Catapult

Test vehicle: Mass: 22 kg maxVelocity: 50 m/s maxShock: 100,000 g

Duration

Shoc

k Le

vel 100,000 g 50 us

41,000 g 120 us16,000 g 300 us

Typical shock signature


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Testing for Survival and Function - Guns

Off axis test vehicleShock-Counter-Shock High Impact gun tests

Shock counter shock (SCS) facilityHigh speed impactsMultiple shocks

(typically +50kg for 700µs, -20kg for 600 µs)High off-axis angles (Sub Modules)


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Conclusions

MAFIS Hard Target FuzeSuccessfully tested in excess of 50 K”g”

Multiple effects, 3 Axis, temperature extremes etc.High reliability – Missile levels

In full scale productionIn service with RAF and USN

Storm Shadow & JSOWGrowth path

Void & Layer insertionBDI/BDAIn-Line TechnologySupersonic Applications

MAFIS Proven Hard Target Fuze


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thales ndia briefing · thales ndia briefing hard target reliability for mafis l.j.turner ceng...

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