25ISB-02-061 ISB2010 Corriveau 2010cradpdf.drdc-rddc.gc.ca/PDFS/unc120/p536803_A1b.pdf ·...

Defence Research andDevelopment Canada

Recherche et développementpour la défense Canada Canada

25th International Symposium on Ballistics, Beijing, ChinaMay 17-21, 2010

Development of a 105mm Artillery Precision Guided Munition

D. Corriveau, P. Brousseau,N. Hamel, F.C. WongDefence R&D Canada - ValcartierQuebec City, Canada

P.-A. Rainville, D. St-ArnaudGeneral Dynamics OTS – CanadaLe Gardeur, Canada

R.J. LilkoHoneywellMississauga, Canada

Defence R&D Canada • R & D pour la défense Canada

Presentation’s Overview

• Objectives

• Guided Indirect Fire Weapon Systems

• Integrated Projectile:• Guidance System

• Canard Actuation System (CAS)

• Warhead

• Projectile’s Aerodynamics

• Conclusions


Objectives• Develop a modeling and experimentation environment that

enable APGM concept evaluation and trade-off studies on sub-155mm munitions

• Develop a fully-integrated precision guided munition

Key outcomes:• In-depth knowledge on guidance and

autopilot software development for a state-of-the-art GPS/IMU device.

• Catalog of airframe and control surface concepts for a family of APGM concepts.

• Directional warhead concepts.


Guided Indirect Fire Weapon SystemsIndirect fire PGM options

Indirect Fire

Missiles Artillery Mortars Weapon System


Guided Indirect Fire Weapon SystemsConvergence Between Precision Guided Projectile and Rocket Weapons Excalibur PGM

1.0 m length155 mm diameter48.2 kg AUW15 kg HE warhead (est.)inertial and GPS guidancecanard flight control35 km rangegun launched

Guided MLRS3.94 m length

230 mm diameter293 kg AUW

90 kg HE warheadinertial and GPS guidance

canard flight control70 km range

pod launched


Guided Indirect Fire Weapon SystemsArtillery PGM Options

Indirect Fire

Missiles Artillery Mortars

105 mm~18 km

155 mm>35km>100km

120 mm>8km

>100km

1 DoFControl

2 DoFControl

1 DoFControl

2 DoFControl

1 DoFControl

2 DoFControl

Single Targetno program

development

Single TargetPGK

LCCC

Multiple Targetno program

development

Single Targetno program

development

Single TargetLCCC

Multiple TargetMRM (Army)ERGM (Navy)

Single TargetTeam STAR

Single TargetPGK

Multiple TargetExcalibur (Army)LRLAP (Navy)

Weapon System

Calibre andRange

Type ofControl

Re-targetingCapability


Integrated Projectile

• 105mm full bore projectile• Designed to be fired from a LG-1 Mk II• Projectile overall length: 615mm• Projectile mass: 12.7kg


Integrated ProjectileGuided Projectile Sub-Systems

GPS

DI-GNU


GPS

DI-GNU

Integrated ProjectileGuidance and Navigation


Deeply Integrated-Guidance Navigation Unit (DI-GNU) Structure

Present StateFederated

• Individual subsystem calibration and test

• Separate processors in each subsystem

• Additional overhead for I/O and each chassis

GPS IMUMission

ComputerAnti Jam

Future State Integrated

• System-level calibration and test

• Provides user with Navigation CEP as a deliverable


Altitude

Range

Laun

ch Guided Terminal

Algorithm Options:1. Maximum lift to drag2. Gravity compensation3. Equilibrium state4. Equilibrium state with

commanded Mach

Pro-Nav

Ballistic

Segmented Trajectory Solution

Canard deployment GPS acquisition and track

Flight phases

Fragmenting warheadSystem initialization


GPS

DI-GNU

Integrated ProjectileControl Surfaces


Canard Actuation System

Autopilot Link

Gearhead & Motor

Bench Power Supply Power Driver

Fins deployed Fins stowed


GPS

DI-GNU

Integrated ProjectileWarhead and Lethality

Defence R&D Canada • R & D pour la défense CanadaDirectionallayered fragments

Warhead

Design Specifications:• Large number of fragments, > 4000• High velocity fragments• Angle of descent, 60 to 80 deg• HOB can be varied to scale effect

Directional warhead concept


Study Parameters:• Height of burst: 8m to 12m• Number of fragments: 2000, 4000, 6000• Fragment velocity: 900 and 1500 m/s• Angle of descent: 60 and 90 deg• Terminal velocity: 0.4 and 0.8 Mach

105mm M1 Directional

Lethality (1)


Lethality (2)DirectionalHOB: 12m

105mm M1HOB: 7m


Projectile’s Aerodynamics

GPS

DI-GNU


Projectile’s Aerodynamics Fins and Canards Configuration

4 Rectangular fins / 4 Clipped-delta canards

8 Clipped-delta fins / 4 Clipped-delta canards

• Initially 12 fin-canard combinations studied• Down-selected to 4 fin-canard combinations

Final configuration

Configuration No. 2

6 Swept fins / 4 Delta canards

Configuration No.11

4 Swept fins / 4 Delta canards

Configuration No. 8

Configuration No. 5


Mach Number

Sta

bilit

yM

argi

n(C

alib

er)

0 0.5 1 1.5 2 2.5 30.00

0.10

0.20

0.30

Stability criterion

• The low static margin at high Mach numbers is not critical since the canard won’t be deployed

• In transonic Mach number range the low static margin will cause the projectile to react swiftly for a given canard deflection

• The constant static margin at low Mach numbers will simplify the guidance algorithm

Projectile’s Aerodynamics Stability margin


Mach Number

Max

imum

Dire

ctio

nalA

utho

rity

(g)

0.5 0.6 0.7 0.8 0.9 12.0

3.0

4.0

5.0

6.0

Temperature: -46oCTemperature: 15oCTemperature: 63oC

Projectile’s Aerodynamics Directional authority


Conclusions

• A 105mm guided artillery projectile was integrated with its various components.

• A directed effect warhead was developed in order to further reduce the risk of collateral damage in urban operations.

• Work on the various sub-systems is continuing in order to prepare an advance engineering phase were a gun-launched prototype will be developed.

25ISB-02-061 ISB2010 Corriveau 2010cradpdf.drdc-rddc.gc.ca/PDFS/unc120/p536803_A1b.pdf ·...

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