43rd Gun & Missile Conference

Presented by:Mr. Perry Salyers

April 21 – 24, 2008

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OUTLINE

• ERGM System Overview

• ERGM System Operation

• M982 System Overview

• M982 System Operation

• System Target & Excalibur Characteristics

• M982 Fuzing System

• S&A Technical Requirements

• MIL-STD-1316D Compliance– Excalibur FSA Time Line

– Excalibur FSA Logic Design

• Fuze Safe & Arm Description

• S&A Mechanical Design

• S&A Electrical Design

• Electrical Module

• S&A Integration

• S&A Explosive Outputs

• HOB Sensor Description

• FS&A Description

• Program Test Results / Milestones

• ESAD Development Status

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EX171 ERGM Tactical SystemTail Fin Assembly

Ram Brake

Ramming Sheath

Pressure Balanced Rocket Motor

High L/D Stable Airframe

Mid-body Obturator

High Explosive

Payload

Safe and Arm Device

Telemetry

Canards

Inertial Measuring Unit

GPS Receiver

Flight Battery Control Actuation System (CAS)

Data Hold Power Source

Height-Of-Burst (HOB) Fuze

Digital Communications Interface (DCI)

Anti-Jam ElectronicsGuidance Electronics Unit (GEU)

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EX171 ERGM OPERATIONAL CONCEPT

Artillery

MissileBatteries

Bunkers

Troops

LAVs

Air Defense

ConventionalProjectiles

ERGMProjectiles

HeloLanding

Zone

NauticalMilesConventional

0 10

20

40

60

30

50Extended Range Guided Munition

Beach Head

Landing Zone

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Excalibur (M982) System Overview

Characteristics/Description:

● Warhead: Unitary● Accuracy: 10m CEP objective● Range: 40Km objective● Targets : Personnel, light materiel, structures● Fuze modes: PD, PD delay, Prox● Environments:

● 15.5 KG set back● Early fielding ~12KG

● 50+ KG penetration

● 155MM Extended Range guided projectile● Fin Stabilized Glide Air Frame● Inductive Set with Enhanced Setter● Inertial Navigation System (INS) Guidance

● All Weather, Day and Night● Compatible with JLW155 & FCS Digitized

● 155mm Platforms● One Meter Length / 106 lb

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Excalibur Unitary Concept of Operations

• Gun Target Location• Trajectory Information• Crypto Keys• Precise Time• Fuze Setting• Power

• Gun Target Location• Trajectory Information• Crypto Keys• Precise Time• Fuze Setting• Power

MissionPlanningMissionPlanning

• Precision Delivery Regardless of Range• Limits Collateral Damage• Decreases Volume of Fire Per Engagement• Enhances Soldier Survivability

• Precision Delivery Regardless of Range• Limits Collateral Damage• Decreases Volume of Fire Per Engagement• Enhances Soldier Survivability

Guidance Acquisitionand Track

Latitude / Longitude / Altitude

Structure Top Attack(Detonation after

Penetration)

FragmentingWarhead

Deploy Canards prior to Apogee

(Ballistic prior to Apogee)

SystemInitializatio

n

Height of Burst Sensor

FragmentingWarhead or Top

Attack Penetrating Warhead depending

on the target

TargetingTargeting

Impact Near Vertical for Max

Lethality

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Excalibur Characteristics Unitary Targets

Infantry PlatoonExcalibur: 3 roundsM549: 25 roundsM107: 43 rounds

RadarExcalibur: 1 roundM549: 10 roundsM107: 11 rounds

Command PostExcalibur: 6 roundsM549: 54 roundsM107: 78 rounds

StructuresExcalibur: 3 roundsM549: 147 roundsM107: 110 rounds

Excalibur at any range

M549 at 20Km

M107 at 15Km

•~10m CEP•Same lethality as an 155 mm HE

System used in a complex

target environment!

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Excalibur Fuzing System (FS&A w/HOB)

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FS&A REQUIREMENTS

• Projectile Application– All Arm - 1,700 G’s– No Arm - 300 G’s

• Spin• Interface With GN&C• MIL-STD-1316D

Compliant

ERGM and ExcaliburMechanical S&A

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Excalibur FSA /Flight Timeline

Safe Separation

Timer

3 SEC<1.0 Sec

9. Detonate

8. Arm CommandTo FSA

3. Arm Power AvailableCanards Deployed

4. “Measure Spin”Cmd to FSA

2. Initialize FSA

T1 = 11 Sec

6. Pass DetMode to FSA

T1

7. Power UpHOB

(Optional)

Electronics Battery

Powerup

Projectile Flight (Unarmed) Projectile Flight

(Armed)

Total flight time 55 to ~260 seconds

5. Valid 2nd Arming Environment

FSA Measures Despin Profile

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2ND Arming Environment Timeline

11 sec, nom

Gun FiredT=0

RATE >7 HzPROJECTILEROLL RATE

VALID 2ND ARMING ENVIR

SAFE SEP TIME ENABLE

MEASURE SPIN MESSAGE TO FSA

RATE < 2 Hz

FSA SAMPLING WINDOW 5 sec

CANARDS EXECUTEDE-SPIN

1-2 sec

SES SWITCH STATUS 1 secmin

2 secmin

ClosedOpen

MISSION COMPUTERDEPLOYS CANARDS

•Unique Excalibur spin profile•Spin switch closed initially (spin rate >7hz)•Spin switch opens after canard deployment (spin rate <2hz)•Delta spin detected within 5 second window where canard deployment occurs•Allow 2 seconds after canard deployment event for dampening of mechanism

Variable timebased on mission

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ARMEnergy

1st Lock(Setback)Removed

BatteryPower

Logic Power

FPGA Power Up/Reset/BIT

Logic FunctionsSafe Separation Timer

IndependentSafe

SeparationTimer

Charge &Fire P.A.

2nd LockRemoved

RechargeFireset

Armed S&A

HOB Sensor

Detonate

IMPACT

LaunchAcceleration

SPINSIGNAL

SYSTEMCOMMANDS

CHARGE

DELAYIMPACT

FPGA OUTPUT

SYSTEM COMMANDSInitializeDetonation ModeMeasure SpinArm

Excalibur FSA Logic Diagram

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• FSA consists of electronics module and mechanical module

• First Arming Environment is setback acceleration implemented mechanically

• Second Arming Environment is detection of de-spin event using a “g” switch

• Safe separation via independent timers• Point Detonate fuze is implemented by a g-switch

opening at impact.• Delay after Point Detonate implemented by electronic

timer• HOB function implemented by RF proximity sensor

using production fuze components

Key Features

1.730” DIA

4.165”

ElectronicsSection

MechanicalSection

Out of Line MechSetback G-switchRotor ControlDetonator ShortingDetonatorOutput Lead

FPGAPower Up LogicPower SeparationTiming CircuitsSpin SensingArming ControlFiring Control

FSA Design Approach Concurred by Army & FMV Fuze Boards

Excalibur Fuze Safe & Arm (FSA) Description

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• Mechanical S&A Design Approach– Modified MK18 S&A

• Higher G Loads

• AFT Detonation Output

• Switches Indicate Rotor Position

• Integrated Electronics Control

– Three (3) Leaf Set Back Mechanism

S&A MECHANICAL DESIGN APPROACH

Leaf Lock Rotor Drive Spring First Rotor Lock (Safe)

Second Rotor Lock (Safe)

Rotor Lock (Arm)

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S&A ELECTRICAL DESIGN APPROACH

• S&A Electronics– RS232 Serial Communication Link – Codeword Controls Function

GN&CSecond Rotor Lock W/PA

Rotor W/Switches & M84 Detonator

Safety Button

Set Back Lock

Second Safety & Arm Lock

Piston Actuator

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Spin Switch

Excalibur Electronic Flex Assembly Module

Fire Capacitor FPGA

ImpactSwitch

IndependentTimer

Spacers

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RTV Potting aroundSpin Switch

Connector (Interface withMechanical S&A)

Cap (PressedInto Housing)

Housing

Potting FillHole

Alignment pin

Excalibur FSA Electronic Sub-Assembly

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Excalibur FSA

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Booster(1” Ø by 1”)

PA509 Lead(.242” Ø dia by .980”)

M84 Detonator(.194” Ø by .37”)

Gap = .024 / .047 “Gap = .037 / .095 “

Stainless Steel 17-4.006 / .012 Thick

Gap = .000 / .020 “

Explosive Train

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FSA Design Summary

• Resulting Capabilities– Meets MIL-STD-1316D– Interactive W/ GN&C– Maximized Overhead

Safety• Independent Timer• Arm Command issued Just

Prior to Endgame– Excalibur was Fielded in

May 2007 for Operation UseM982

ERGM

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S&A Program Milestones

• M982 (Excalibur) S&A– Completed Design Analysis, Design Verification Testing,

Qualification, and AFSRB Certified– The Excalibur System was Fielded in May 2007 and is

Currently in Operational Use– KDI is Under Contract to Develop a Low Cost ESAD

Alternative S&A Design• ERGM EX87 S&A

– Finished DVT– ERGM has been terminated. The requirement for a guided

extended range munition is still valid. NAVSEA is currently restructuring the program.

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Excalibur ESAD Development

• Development team consisted of members from KDI, ARDEC fuze group at Picatinny and Adelphi

• Development program objectives accomplished– Drop-in replacement with existing S&A– Lower Unit Production Cost– Increased reliability – Hardware tests used to mitigate initial high risk areas – 1st Environment sensor designed, developed and tested– AFSRB informal and formal review completed – Preliminary Design Review completed

• Electrical and mechanical design completed– Functional hardware fabricated and tested

• Explosive function test success • ARDEC airgun and railgun mechanical shock tests successfully completed (gun

launch simulated) • EGLIN AFB howitzer hard target penetration tests successfully completed