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The University of Texas at Austin

Institute for Advanced Technology, The University of Texas at Austin - AUSA - February 2006 IAT Talk 1358 Eraser

Institute for Advanced Technology, The University of Texas at Austin - AUSA - February 2006 IAT Talk 1358 Transitioning EM Railgun Technology to the Warfighter

Dr. Harry D. Fair, Director Institute for Advanced Technology The University of Texas at Austin The Governator is correct! • At the IAT, we are harnessing large quantities of electric energy to enable radically new capabilities for the warfighter.

• These new electric weapons are capable of accelerating high energy Electric are real. from electric railguns on land, sea, and air platforms,

and are capable of protecting these platforms by electromagnetic protection systems.

Institute for Advanced Technology, The University of Texas at Austin - AUSA - February 2006 IAT Talk 1358 Hypervelocity Electromagnetic Railguns

What are they?

How do they work?

Why change to electromagnetic energy?

How can we use them?

When can we have them?

What are the implications for the Army and the Navy?

Institute for Advanced Technology, The University of Texas at Austin - AUSA - February 2006 IAT Talk 1358 What is an Electromagnetic Railgun? Converts Electricity to

The barrel can have any cross section - round, The accelerating Force square, rectangular is provided by Electromagnetic Forces and can accelerate projectiles to very high

Force

Muzzle view We routinely launch projectiles to (from 2-6 km/sec) in our laboratory.

Institute for Advanced Technology, The University of Texas at Austin - AUSA - February 2006 IAT Talk 1358 What is an Electromagnetic Railgun System?

Target defeat

Railgun in flight breech Busbars Launch package at muzzle Pulsed

Rectifier and switches Engine Generator

The IAT addresses the critical issues for all of these components for direct and indirect fire Institute for Advanced Technology, The University of Texas at Austin - AUSA - February 2006 IAT Talk 1358 Why Transform to Electromagnetic Energy? • Controlled/Precise/Variable Lethality – Non lethal to overwhelming lethality (1 to 1000 km)

• Increased Battle Space – Capable of extremely long ranges

• Survivability - No hazardous propellants and possibly no explosives on board

• Logistics - Smaller ammunition (8% of – 10% of volume for direct fire) - Eliminate propelling charges for NLOS/long range fires

• Operational Flexibility – Convert fuel to kinetic energy – shorter time of flight – Multi role, multi mission – Minimum / controlled collateral damage

• Entirely New Missions – ultra long range precision strike(up to 1000km )

• Positions DoD industrial base to more accurately reflect changes Institute for Advanced Technology, The University of Texas at Austin - AUSA - February 2006 IATin Talk U. 1358S. economy. What are the Critical Science & Technology Challenges?

• Hypervelocity Lethality – Defeat of Modern Armor – Hypervelocity Guidance and Control • Electromagnetic Railgun Lifetime • Electric Power • Power Conditioning/Switching

Institute for Advanced Technology, The University of Texas at Austin - AUSA - February 2006 IAT Talk 1358 Greatest Lethality Challenge

+

Explosive Armor Steel Spaced Base Armor Reactive Armor (ERA)

Explosive Reactive Armor defeats shaped charge warheads and kinetic energy rods and can be retrofitted to combat vehicles

Institute for Advanced Technology, The University of Texas at Austin - AUSA - February 2006 IAT Talk 1358 Lethality: Direct-Fire Hypervelocity Novel Penetrators Defeat Current and Future Armors

Hypervelocity rods penetrate more because target strength is overwhelmed. M-1 Abrams Muzzle

Institute for Advanced Technology, The University of Texas at Austin - AUSA - February 2006 IAT Talk 1358 Hypervelocity Provides Important New Capabilities

IAT Extending penetrators: • Launch and fly long rod to target • Extend before impact P=L • Impact in extended configuration

Institute for Advanced Technology, The University of Texas at Austin - AUSA - February 2006 IAT Talk 1358 Hypervelocity Lethality

• Understanding the physics at impact has enabled us to develop hypervelocity novel penetrators which can provide the

– Lethality overmatch

And more importantly

– The necessary lethality with significantly reduced launch energy

Institute for Advanced Technology, The University of Texas at Austin - AUSA - February 2006 IAT Talk 1358 Railgun Lifetime Challenges

Gouging Muzzle Blast • Surfaces rub past each • High temperature muzzle arc (20,000 K) other at high • Severe damage to ends of rails and insulators • Large optical/thermal signature

All of these critical challenges are Arc Transition resolved •20,000 K arc at rail/ interface

Institute for Advanced Technology, The University of Texas at Austin - AUSA - February 2006 IAT Talk 1358 Power Source - The Major Technical Challenge for Army Applications

700kA Experimental Simulation 600

• IAT developed a simulation for 500 a new type of pulsed 400

300 – providing an independent Load Current validation tool for Government 200 100 and industry Saber Data shifted by -1.1ms 0

70 72 74 76 78 80 82 84 msec

• Pulsed alternator technology transitioned from UT Center for Electromechanics to Industry (Curtiss-Wright)

Combines flywheel and pulsed alternator technologies Institute for Advanced Technology, The University of Texas at Austin - AUSA - February 2006 IAT Talk 1358 In the past several years, all of the critical “showstoppers” have been resolved

• Hypervelocity projectiles: – Tungsten nose tips survived hypervelocity flight up to 3 km/sec. – Hypervelocity rods penetrate more because target strength is overwhelmed. - Novel hypervelocity projectiles have been fabricated with low parasitic mass - Electronic components for guidance, navigation and control have been tested above 100kgees Railgun Bore Life: – Hypervelocity gouging eliminated by proper choice of materials – Transition to arcing contact at hypervelocity eliminated by novel E M designs which also eliminate contact and damage to insulators – Multiple shots on single set of rails (60 shots for Navy-similar test series underway for Army)

• Signature – Muzzle shunt reduced muzzle blast by 3 orders of magnitude 700kA Experimental Simulation 600 500 • Pulsed Electromagnetic Power 400

300 Load CurrentLoad –A simulation for a new type of pulsed 200 alternator provided an independent 100 Saber Data shifted by -1.1ms 0 validation tool for Government and

70 72 74 76 78 80 82 84 msec industry – Pulsed alternator technology transitioned from UT Center for Electromechanics to Industry Institute for Advanced Technology, The University of Texas at Austin - AUSA - February 2006 IAT Talk 1358 Can EM technology be integrated into a mobile tactical combat vehicle?

•EM Railgun •Projectiles •Pulsed Power Supply •Recoil/Auto Loader •Prime Power

Institute for Advanced Technology, The University of Texas at Austin - AUSA - February 2006 IAT Talk 1358 Drawing provided by BAE Systems New Types of Electric Pulsed Power Sources are Required • A pulsed alternator stores kinetic energy in the and converts kinetic to electric energy to power the railgun.

• The pulsed alternator incorporates an integral flywheel to store energy for a number of shots without recharge.

• Recharge occurs with an powered from the hybrid vehicle engine/generator/battery.

• ARDEC has contracted with Curtis-Wright to build a power source to provide 2-5MJ kinetic energy at railgun muzzle. Institute for Advanced Technology, The University of Texas at Austin - AUSA - February 2006 IAT Talk 1358 Direct Fire – Pulsed Alternators and Low Energy Hypervelocity Projectiles are the Enabling Technologies

Drawing provided by BAE Systems

Current Pulsed Alternator Technology • Pulsed alternator under construction

- First alternator complete May 07 Potential Next Generation Power Source - Alternator system complete FY08 • Pulsed alternators completion FY(10-11?) • 2-5MJ muzzle KE • 8-10MJ muzzle KE • Volume 1.9 m3 • Mass 7000 kg • Volume 1.5m3

• Mass 4000kg Institute for Advanced Technology, The University of Texas at Austin - AUSA - February 2006 IAT Talk 1358 DARPA challenged IAT to evaluate Electromagnetic Launch to provide Unprecedented Gun Ranges

Ground Range (km) 0 40 80 120 160 200 240 280 320 360 400 440 480 160

80 140 USMC Future 70 Assault 120 Range Requirement 60 le ti c m 100 je k o r 50

e P L Increased Range

d s M /

u m

80 E t

i 0

t 0 40 l Reduced Time of Flight 5 , 2 A = 60 Z Increased Lethality U M 30 V Sensible Atmosphere 40 V T e 20 r m

=

1 , 20 155 6 5” mm 0 10 / E / L 0 R RL GM AP m / s 0 0 Range 0 20 40 60 80 100 120 140 160 180 200 220 240 (n miles) Weight 70 kg 175 kg 20 kg Energy on Target 6.6 MJ 13.7 MJ 17 MJ Institute for Advanced Technology, The University of Texas at Austin - AUSA - February 2006 IAT Talk 1358 Innovative Naval Prototypes

• Disruptive technologies that for reasons of high risk or radical departure from established requirements and concepts of operation are unlikely to survive without top leadership endorsement.

Admiral Michael G. Mullen USN. - CNO

The Electromagnetic Railgun has been selected as the First Innovative Naval Prototype

Institute for Advanced Technology, The University of Texas at Austin - AUSA - February 2006 IAT Talk 1358 Sea-based Long Range Precision Fires

Institute for Advanced Technology, The University of Texas at Austin - AUSA - February 2006 IAT Talk 1358 Lethality: In-Direct Fire KE Provides Rain of High Velocity Rods

Dispensable Warhead OR OR

> 28x200-g or 1750x3.2-g or 7000x0.8-g rods GNC Module Lethal Tungsten rods

• Inert tungsten rods • Control impact area by height of dispersal • Uniform lethality over impact area • Minimum collateral damage

Conventional High EM Kinetic Explosive Energy

Institute for Advanced Technology, The University of Texas at Austin - AUSA - February 2006 IAT Talk 1358 Projectile Trajectories Long Range 50 Precision Fires: Sensible Atmosphere 40 What is the expected performance of an 30 Indirect fire EM Gun? 20 Altitude (km)

10

Mass= 10 kg KE projectile Velocity = 1200 m/s 0 0 1020304050607080 Range (km)

Novel Kinetic energy projectile may provide precision fires at 2-3 times the range of conventional Institute for Advanced Technology, The University of Texas at Austin - AUSA - February 2006 Drawing IATprovided Talk 1358by BAE Systems munitions. Survivability and Logistics Implications

Precision Direct Fire Precision In-Direct Fire 120-mm Round + MAC M 107 155mm vs vs NoNo PropellantsPropellants

90-mm EM Round- Kinetic Energy EM Projectile greater lethality

Eliminate/Reduce: – Propellants and propellant charges 150 Inert EM KE – Army propellant manufacturing facilities Projectiles – Army loading facilities packaged in – Army propellant lifetime assessment same space as – Shipping and storage of hazardous materials 16 M829s Reduction of: – Trucks 8%8% thethe VolumeVolume 10%10% thethe WeightWeight – Truck drivers } convert to warfighters – O&M costs Institute for Advanced Technology, The University of Texas at Austin - AUSA - February 2006 IAT Talk 1358 The elimination of propelling charges (MACs) provides space for additional electric power in the resupply vehicle.

50 Sensible Atmosphere 40 Additional electric 30 power on resupply vehicle extends range

Altitude (km) 20

10

0 0 102030405060708090100110

Drawing provided by BAE Systems Institute for Advanced Technology, The University of Texas at Austin - AUSA - February 2006 IAT Talk 1358 Summary

• We have been successful in achieving major advances in the fundamental science and technology of EM Railguns

• The Army and Navy are actively pursuing ground and sea-based EM Railgun applications

• The implementation of EM Railgun technology will not only provide the opportunity to replace or significantly enhance existing weapon capabilities, but will provide the National leadership revolutionary new tactical and strategic options

• The IAT commitment is to ensure that when EM Railguns are employed, they will be in the hands of U.S. Forces.

• We are seeking your help to provide insight and manufacturing, engineering and integration competence so that unmatched revolutionary capabilities are available to our warfighters

Institute for Advanced Technology, The University of Texas at Austin - AUSA - February 2006 IAT Talk 1358