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Thales Missile Electronics THALES MISSILE ELECTRONICS LIMITED THALES NDIA-09 Briefing AURORA – Next Generation Fuzing System L.J.Turner CEng MIMechE, MIET. Head of Ordnance Systems Group

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Page 1: THALES NDIA-09 Briefing · 6 Thales Missile Electronics OHP-NDIA TME Brief.ppt – L.Turner - Tuesday, 02 June 2009 THALES MISSILE ELECTRONICS LIMITED Fuze Second Environment Sensing

Thales Missile ElectronicsTHALES MISSILE ELECTRONICS LIMITED

THALES NDIA-09 Briefing

AURORA – Next Generation Fuzing SystemL.J.Turner CEng MIMechE, MIET.

Head of Ordnance Systems Group

Page 2: THALES NDIA-09 Briefing · 6 Thales Missile Electronics OHP-NDIA TME Brief.ppt – L.Turner - Tuesday, 02 June 2009 THALES MISSILE ELECTRONICS LIMITED Fuze Second Environment Sensing

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Ordnance Systems

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TME Ordnance Hard Target Fuzing Pedigree

FIBDIDMEHTF

STRIFE

Intelligent Fuzing Research since 1995

PSFTAURORAPaveway IV

MFBFStorm

Shadow

MAFIS PV (Core Module)

JSOW

HTSF

MAFIS MLU

SG 357

Paveway III(ABF)

Cost Reduction

MOP

HTVSF JCTD

Page 4: THALES NDIA-09 Briefing · 6 Thales Missile Electronics OHP-NDIA TME Brief.ppt – L.Turner - Tuesday, 02 June 2009 THALES MISSILE ELECTRONICS LIMITED Fuze Second Environment Sensing

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Background To Aurora Fuze

< 2/3 g seen

<1/3 g seen

T 0

Accelero meter works

Free Fall Observed

Example for Illustration

MEHTF

IF research since 1995

PSFT

AURORA

MFBFStorm

Shadow

MAFIS

JSOW

Paveway IV(PGB)

Page 5: THALES NDIA-09 Briefing · 6 Thales Missile Electronics OHP-NDIA TME Brief.ppt – L.Turner - Tuesday, 02 June 2009 THALES MISSILE ELECTRONICS LIMITED Fuze Second Environment Sensing

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Aurora Design & Development

AuroraDesign, Develop and Qualify fuze for Paveway IV WeaponDevelopment contract for FuzingSystem in Jan 2004Contract covers development & production Successful qualification in early 08In Full Rate Production

High Reliability Programmable Guided Weapon FuzeIn-Line Safety and Arming System based on MEHTF/PSFT.Hardened, 3” Fuzing System using 2” electronicsEmploys Novel Post Release Safety Environment Sensing

Fuze

Page 6: THALES NDIA-09 Briefing · 6 Thales Missile Electronics OHP-NDIA TME Brief.ppt – L.Turner - Tuesday, 02 June 2009 THALES MISSILE ELECTRONICS LIMITED Fuze Second Environment Sensing

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Fuze Second Environment Sensing

Summary of Requirements for Safety Sensors:1st Sense the Intentional Release from the launch platform2nd Confirm Weapon has been released into the expected

environment(Operation of at least one of the independent safety features shall depend on sensing an environment after first motion in the launch cycle or on sensing a post launch environment. ) STANAG 4187 & Mil-Std-1316

Safety (Probability of False ARM)

The Post Launch Environment Signature Shall be Unique

Cannot be generated by credible accident, in normal handling, use, deployment or be subject to a single point failure

Reliability (Probability of Detection)

Throughout the operational flight envelope

In line with the system requirement

Page 7: THALES NDIA-09 Briefing · 6 Thales Missile Electronics OHP-NDIA TME Brief.ppt – L.Turner - Tuesday, 02 June 2009 THALES MISSILE ELECTRONICS LIMITED Fuze Second Environment Sensing

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Fuze Second Environment Sensing

Typical SensorsAir Flow:

Can provide a power sourceBut: senses an environment that is not totally unique to either “First Motion”or “Post Launch” (mainly “lanyard pulled”)Also issues with high altitude, thin air,damage, drag etc.

Retardation sensing:Parachute operation detection

Air pressure:Pitot (air speed) Motor operating

Page 8: THALES NDIA-09 Briefing · 6 Thales Missile Electronics OHP-NDIA TME Brief.ppt – L.Turner - Tuesday, 02 June 2009 THALES MISSILE ELECTRONICS LIMITED Fuze Second Environment Sensing

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Novel Concept for Second Environment Sensing

Weapon Arming Manoeuvre (WAM)PSFT introduced crossed axis MEMS Accelerometers and

Processor to sense Post Release Environment

EXAMPLE : Internal Fuze Accelerometers monitor unique launch “g” followed by post launch zero “g” to confirm post launch environment

> Threshold g seen < 2/3 g seen <1/3 g seen

Accelerometer works

Free Fall Observed

Release from aircraft = T0 Environment Confirmed

Page 9: THALES NDIA-09 Briefing · 6 Thales Missile Electronics OHP-NDIA TME Brief.ppt – L.Turner - Tuesday, 02 June 2009 THALES MISSILE ELECTRONICS LIMITED Fuze Second Environment Sensing

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AURORA Fuze - WAM / BWAD

Implementation Allow weapon to determine start point Two stage manoeuvre

Enable ArmingLate Arm signal

Weapon Armed

Ballistic Free Fall Pull-Up Manoeuvre

Start Command

Late Arm Signal

Charge

Armed

Page 10: THALES NDIA-09 Briefing · 6 Thales Missile Electronics OHP-NDIA TME Brief.ppt – L.Turner - Tuesday, 02 June 2009 THALES MISSILE ELECTRONICS LIMITED Fuze Second Environment Sensing

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BWAD Requirements

The Ballistic Weapon Arming Detector (BWAD) will detect two events:

The presence of ballistic flight called the “quiet zone”.

A manoeuvre at a precise time following the “quiet zone”.

Ballistic WAD Threshold and Timing:

Upon receipt of the start command from the weapon, the Fuze will enable the circuitry to validate the weapon motion during quiet zone and manoeuvre.

Two different acceleration thresholds (g levels) are defined; one for each event.

During the quiet zone the g levels must remain below the acceleration threshold.

Following the quiet zone, the g level must cross the acceleration threshold during the manoeuvre

A Dual Axis Accelerometer is used to measure the “g” levels as the manoeuvre is performed

Accelerations due to Vibration on the Wing Encountered During Training and Tactical Missions and due to vibration encountered during transport or assembly not be mistaken for the WAM

Page 11: THALES NDIA-09 Briefing · 6 Thales Missile Electronics OHP-NDIA TME Brief.ppt – L.Turner - Tuesday, 02 June 2009 THALES MISSILE ELECTRONICS LIMITED Fuze Second Environment Sensing

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Ballistic Weapon Arming Detection (BWAD) Description

Down Range

Alti

tude

Start Message Sent To Fuze

Weapon Release Weapon Free FallZero Accelerations

Weapon CreatesLateralAccelerations

Weapon ArmingDetectionWindows

WADCircuitDetection

Weapon Free FallZero Accelerations

StartMessageSent

t1 t2 t3 t4

t0

Must Not Exceed Threshold

Must Exceed Threshold

Time

Pass

Quiet Zone Threshold QTNoise Zone Threshold NTQuiet Zone Witness Window Open Time t1Quiet Zone Witness Window Close Time t2Noise Zone Witness Window Open Time t3Noise Zone Witness Window Close Time t4

QT NT

BWAD Variables

Page 12: THALES NDIA-09 Briefing · 6 Thales Missile Electronics OHP-NDIA TME Brief.ppt – L.Turner - Tuesday, 02 June 2009 THALES MISSILE ELECTRONICS LIMITED Fuze Second Environment Sensing

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AURORA Fuze - ‘WAM’ / ‘WAD’

Advantages:Unique second environmentManoeuvre is at commanded time:

When convenient to weaponCan be set to specific flight parametersExpands release envelope

Simple in operationAll “Hardware” checking logicNo (Safety Critical) Software

Ballistic Free Fall Manoeuvre

Start Command

Page 13: THALES NDIA-09 Briefing · 6 Thales Missile Electronics OHP-NDIA TME Brief.ppt – L.Turner - Tuesday, 02 June 2009 THALES MISSILE ELECTRONICS LIMITED Fuze Second Environment Sensing

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Sensor Validation Strategy

Analyse and Prove Safety & Reliability performance Develop a model of the sensor and circuit

Validate performance over the spread of component tolerances and temperatures against the actual aircraft & credible accident scenario’s

Use actual recorded data from aircraft

Generate data for credible accidents

Validate model against hardware in simulated environment

Page 14: THALES NDIA-09 Briefing · 6 Thales Missile Electronics OHP-NDIA TME Brief.ppt – L.Turner - Tuesday, 02 June 2009 THALES MISSILE ELECTRONICS LIMITED Fuze Second Environment Sensing

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Sensor Validation Strategy

Model of the sensor and circuit

Include Sensor parameters

Sensitivity

Linearity

Offset

Cross axis coupling

Include component & circuit variability's

Component tolerances

Temperature variations

Noise

Calibration

Page 15: THALES NDIA-09 Briefing · 6 Thales Missile Electronics OHP-NDIA TME Brief.ppt – L.Turner - Tuesday, 02 June 2009 THALES MISSILE ELECTRONICS LIMITED Fuze Second Environment Sensing

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WAM/WAD - Modelling

Model Benefits

Fast Run-times

Enabled multiple runs

Good statistical analysis

GUI front end – easy to use

Parameters can be tuned in real time

Enabled understanding of design and its limitations

Enabled difficult trajectories to be easily identified and investigated

Allowed performance of intent to be assessed without circuit being implemented

Page 16: THALES NDIA-09 Briefing · 6 Thales Missile Electronics OHP-NDIA TME Brief.ppt – L.Turner - Tuesday, 02 June 2009 THALES MISSILE ELECTRONICS LIMITED Fuze Second Environment Sensing

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Model Validation Plan

Centrifuge testing of assembly

Centrifuge can simulate the actual weapon environments

Two axis positioner allows acceleration produced to be vectored into difference axes

Aligning fuze’s two sensing axes orthogonal to acceleration vector enables the fuze to detect zero “g”

Dynamic testing with Start command” followed by vectored acceleration allows representative BWAM to be applied to fuze

Aircraft type data can also be applied. Selection of data close to the decision threshold achievable

Incorrect inputs to prove no arming of system

Proved BWAD performance - Safe & Suitable for service

Page 17: THALES NDIA-09 Briefing · 6 Thales Missile Electronics OHP-NDIA TME Brief.ppt – L.Turner - Tuesday, 02 June 2009 THALES MISSILE ELECTRONICS LIMITED Fuze Second Environment Sensing

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Conclusions

Aurora accepted into UK serviceDOC trials at China Lake

Paveway IV deployed with UK Armed Forces

Successfully fired in combat Against a range of hard & soft targets

Page 18: THALES NDIA-09 Briefing · 6 Thales Missile Electronics OHP-NDIA TME Brief.ppt – L.Turner - Tuesday, 02 June 2009 THALES MISSILE ELECTRONICS LIMITED Fuze Second Environment Sensing

Thales Missile ElectronicsTHALES MISSILE ELECTRONICS LIMITED

THALES NDIA-09 Briefing

AURORA – Next Generation Fuzing SystemL.J.Turner CEng MIMechE, MIET.

Head of Ordnance Systems Group