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Multi-Mode Fuzing for XM1069/120MM LOS MP

NDIA Fuze Conference

Seattle, Washington

April 7, 2005

Presented by: Jason Friedberg

Contributors: Olivier Nguyen

Barry Schwartz

Eric Scheper

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Program Background

• 2 year ATO Program to demo an ARDEC designed multi-purpose projectile against:– Hard targets – bunkers, buildings, vehicles– Anti-Personnel

• ARDEC designed Multi-Mode Fuze• Settable for

• Impact• Impact w/delay• Airburst at set time

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LINE OF SIGHT MULTI-PURPOSE PROJECTILE

Combines capabilities of Canister, M830A1, M908 and HEP into one round.

Combines capabilities of Canister, M830A1, M908 and HEP into one round.

FUTURE: 1 ROUND

2010

PRESENT: 4 ROUNDS 2005

M908

M830A1

M1028 Canister

M393 A3

TARGET SET

Combines capabilities of Canister, M830A1, M908 and HEP into one round.

Combines capabilities of Canister, M830A1, M908 and HEP into one round.

FUTURE: 1 ROUND

2010

PRESENT: 4 ROUNDS 2005

M908

M830A1

M1028 Canister

M393 A3

PRESENT: 4 ROUNDS 2005

M908

M830A1

M1028 Canister

M393 A3

TARGET SETTARGET SET

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Projectile Designs

• Full Bore 120MM projectile– Acceleration = 40kG –Velocity = 1190 m/s – Spin = 18 rps

• Blast warhead• Fragment system• Base Mounted Fuze• Folding fins

• Sub Caliber Sabot Round– Acceleration = 55kG–Velocity = 1495 m/s– Spin = 30 rps

• Blast warhead• Fragment system• Base Mounted Fuze• Fixed fin

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Projectile Designs

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Hard target penetration test

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Fuze System Design

• Nose Mounted Impact Switch

• Base Mounted Fuze Module containing:

–Plug-in S&A–Microcontroller Circuitry

• Modular design

–Fuze holder houses electronics and plug-in S&A

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Fuze Mechanical Design

• Mechanical s&a based on M509• Three leaf setback lock• Irreversible commit to launch

signal– Alternate environment - base

pressure switch• Piston actuator 2nd safe

– Used for arming delay• Explosive train redesigned to

eliminate moving contacts – Fixed M100 detonator– Transfer to M61 detonator in rotor

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Full safe

•3 leaf mechanism engaged

•PA in safe position

Post setback

•Leaf mechanism disengaged

•Rotor held by PA pin

Safe & Arm Design

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Safe & Arm Design Armed

•PA has been fired

•Rotor moved into in-line position

M100 electric detonator

M61 stab detonator

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• ProE Dwgs showing s&a in safe and

armed position

Safe & Arm Design

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Photos of fuze hardware

• Mechanical parts manufactured by

ManufacturingCompany

•Electronics designed and built at Picatinny Arsenal

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Structural Analysis

• ANSYS FEA software• 55000 G’s• Max Stress = 29000 psi• Well below yield stress

limits for material

Acceleration

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Fuze Electronic Design Features

• Storage capacitors in fuze charged during start of data transmission – Capable of powering circuit for 10 sec after gun launch

• Dual microcontroller design– High speed micro w/crystal oscillator handles data transmission (target

info, airburst time) and calibrates time for low speed oscillator – Low power micro w/RC oscillator performs flight timing for airburst

mode • Data talkback used for diagnostic purposes• Temperature sensor and proximity sensor added for future growth• RS-232 interface • Super quick response in point detonate mode.• Precision of 1 meter or better in airburst mode.

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Electronic Fuze System

4 M H zC r y s t a l

P o w e rS to ra g e C a p s

P r e c is io nR C c lo c k

L o w P o w e r

P r o x s e n s o r

T e m p e r a t u r es e n s o r

Im p a c t S e n s o r s

a 11

b 12

a 11

b 12

a 11

b 12

a 11

b 12

a 11

b 12

a 11

b 12

a 11

b 12

a 11

b 12

a 11

b 12V D D V S S

P R IM A R Y M IC R OP IC 1 6 C X X X

T X

R X

L O N G D E L A YR C M O D U L E

L D L Y

S H O R T D E L A YR C M O D U L E

S D L Y

S U P E R Q U IC KP O IN T D E T .

S P Q

D E T

P A

M U L T IP L E X O R

N O S E S W IT C H

S E T T E R B O XT R A N S C E IV E R

M O D U L E

a 11

b 12

a 11

b 12

a 11

b 12

a 11

b 12

V D D

V S S

C L K IN

C L K O U T

P IC 1 2 F 6 7 5

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Photos of circuits

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Fuze Software

S O F T W A R E L O WB A U D

T R A N S C E I V E RM O D U L E R S - 2 3 2

S O F T W A R E L O W& H I G H B A U D

T R A N S C E I V E RM O D U L E R S - 2 3 2

M A T HR O U T I N E

F U N C T I O N T I M EA N D F U N C T I O NM O D E S E T U P

W A I T F O RG S W I T C HC L O S U R E

F U N C T I O N O N P Do r S D L Y o r L D L Y o r

A B M O D E A TT A R G E T

S H U T D O WN T O S A V E

P O W E R

C L KC A L I B R A T I O N

A U T O B A U DC A L I B R A T I O N

P O W E R O NS E T U P D E F A U L T

F U N C T I O NM O D E

P O W E R O N

S E T T E R B O XT R A N S C E I V E R

M O D U L E R S - 2 3 2

F U N C T I O N T I M EA N D F U N C T I O N

M O D E

F U Z E E L E C T R O N I C

P I C 1 6 C x x P I C 1 2 F x x x

S E T T E R B O X

P I C 1 7 C x x

W A I T F O R F I R E DT I M E R E X P I R E

W A I T F O R U S E RN E X T I N P U T

- 2 4 V P . S

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Fuze Setter Box

Breadboard

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Setter Box Design

PIC17C44MicrocontrollerLoad data

Enter data

Transmit data/Fire round

Power on/Safety switch

RS232TX port

DC Levelshift

LED1 1 2 5 0

TargetMode Time (msec)

Power, data, & primer fire signalFuze data

DC Power supply+24 VDC, 4 amp(primer power)

-24 VDC, 200 ma

ACpower

+5 VDC reg

To fuze

Logicpower

reset

Xtal4 Mhz

LED Latch driver

Logic Relay control

+24VDC

+5v

RS232 RX port

Mux

PIC17C44MicrocontrollerLoad data

Enter data

Transmit data/Fire round

Power on/Safety switch

RS232TX port

DC Levelshift

LED1 1 2 5 0

TargetMode Time (msec)

Power, data, & primer fire signalFuze data

DC Power supply+24 VDC, 4 amp(primer power)

-24 VDC, 200 ma

ACpower

+5 VDC reg

To fuze

Logicpower

reset

Xtal4 Mhz

LED Latch driver

Logic Relay control

+24VDC

+5v

RS232 RX port

Mux

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Fuze level tests

• Successful Safety tests– Transportation vibration– Jolt & Jumble – Out-of-line

• Successful Air gun testing of mechanical and electronic components up to 60,000 Gs completed at Picatinny

• Progressive Arming

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Project Accomplishments

• Fuze design and lab tests successfully completed• Projectile structural tests successfully completed• Test projectiles built for initial fuze impact mode

test• Tests planned for 3-4th qtr FY05 to demo warhead

effectiveness and fuze functioning