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1© 2004 Kaman Aerospace Corporation© 2004 Kaman Aerospace Corporation 3/29/05
Buried Target Fuze
To: 49th Annual Fuze Conference
By: Dale Spencer, Kaman
Contributing Author:
Dr. Helmut Muthig, TDW
2© 2004 Kaman Aerospace Corporation© 2004 Kaman Aerospace Corporation 3/29/05
Presentation Overview
The Buried Target Fuze (BTF) Team
The Programmable Intelligent Multi Purpose Fuze (PIMPF) as the basis for BTF
• Rationale, Benefits, Concept, etc.
NAVY Foreign Comparative Testing for PIMPF
3© 2004 Kaman Aerospace Corporation© 2004 Kaman Aerospace Corporation 3/29/05
BTF Team
General Overview – BTF– TDW has a qualified fuze (PIMPF) and is in production for the
German Taurus Missile and the Norwegian Naval Strike Missile.• Hard target penetrator• Counts voids/ (hard) layers w/ back-up timer• Detonates at the prescribed condition
– Kaman is the producer of the Maverick, BLU-116, JPF, SLAM-ER, Tomahawk, and JASSM “penetration” Fuzes.
– The Kaman and TDW team are combining their Fuzing experience to:
• Produce PIMPF in US for “New Warhead” applications, e.g. Tmhwk.• Re-package the PIMPF Function for applications in 3” US Fuze Well
– Buried Target Fuze (BTF)– Retain PIMPF Void Sensing Electronics without modification
4© 2004 Kaman Aerospace Corporation© 2004 Kaman Aerospace Corporation 3/29/05
BTF Rationale
Opportunity to quickly meet Hard and Deeply Buried Target needs:– For New and Reworked Warheads use PIMPF Fuze-well design
• Fuzes in the field in approx. one year– For existing warheads Re-Package into US Std. Fuze-well
• Fuzes in the field in approx. two years– Design facilitates either Missile or Bomb Fuze configuration
Provide Layer and Void Counting capability coupled with– Mission/ Cockpit Programmability– Back-up timer capability– Robust proven environmental worthiness– High Reliability
5© 2004 Kaman Aerospace Corporation© 2004 Kaman Aerospace Corporation 3/29/05
BTF Benefits
Reduced Risk for Layer and Void Counting Applications– Proven/ In Production Technology – Fuze does not require tuning– Uses smart software to extract penetration events rather than
double integrating sensor signals– Software handling mitigates instrument baseline drift bias in
sensors as sensors experience multiple high “G” loads
Reduced Development Time -- Minimal Development Time, Repackage vs. Redesign utilizing proven, in-production Fuze
Maintain Safety – Compatible with “Out-of-Line”– PIMPF meets STANAG 4187 NATO equivalent to
US Mil-Std-1316.
6© 2004 Kaman Aerospace Corporation© 2004 Kaman Aerospace Corporation 3/29/05
The PIMPF/ BTF Threat: Target Spectrum
Point Targets Area Targets
A/C in the Open
Fixed SAM-Sites
ShelterBunker: direct / indirectsignature
Taxiway & Runway
Bridge PierAmmunition Store Ships in Port
7© 2004 Kaman Aerospace Corporation© 2004 Kaman Aerospace Corporation 3/29/05
The Initial BTF Concept
~4.5” to 3” Dia.
MSL to Bomb Fuze Add Gag Rod
Retain Electronics
Re-Package S&AUtilize FMU-143
Booster
PIMPF BTF
8© 2004 Kaman Aerospace Corporation© 2004 Kaman Aerospace Corporation 3/29/05
PIMPF Functional Block Diagram
Micro-Controller Electrical I/O
Firing Circuit
Power Supply
nvSRAM
Non volatile memory
ROM RAM
PIMPF
Softwarea
Shock Sensor Amplifier Filter
AD
A/D-Converter
CWC
(Distance Sensor)
(Precharge)
(Impact Switch)
9© 2004 Kaman Aerospace Corporation© 2004 Kaman Aerospace Corporation 3/29/05
Software Functions
Communication Software
Commands
Self test results
Fuzing program
CWC
Firing
Signal
Impact /
Exit EventsPenetration Algorithm
Acceleration /
Shock
Algorithm Parameters
• Self Test • RAM / ROM Ports • Acceleration Sensor• Amplifier Gain• Filter Characteristics• (Distance Sensor)• (Impact Switch) etc.
Firing Algorithm
FiringParameters
Fuzing Program
10© 2004 Kaman Aerospace Corporation© 2004 Kaman Aerospace Corporation 3/29/05
BTF Program Flow for Bomb & Missile
BTF
During FreeFlight Phase
During CaptiveFlight Phase
Ground LoadingUnit
PortablePortableCMBRETRNS
RS 422
CarryingAircraft
MIL-STD-1760/1553
JDAM/Missile TRNS
RS 422
MissionPlanningSystem
At Installation of theMission Planning System
FuzingPrograms
During Mission Planning Process
During Mission Loading Process
11© 2004 Kaman Aerospace Corporation© 2004 Kaman Aerospace Corporation 3/29/05
Experimental Results/Number of Tests performed
Target Type (MEPHISTO) No. of Tests
"Bunker" 43 layers of reinforced concrete"Shelter" 6(Sand / reinforced concrete / gravel / reinforced concrete)"Heavy Bunker" 4(one massive layer of reinforced concrete)"Ship" 3(2 steel plates) Total (full-scale): 17 (plus 8 half-scale)
"Ship Target" (NSM) 7" Taurus Missile Live Fire" 2
Grand Total: 34 out of 34 Succesful Tests
12© 2004 Kaman Aerospace Corporation© 2004 Kaman Aerospace Corporation 3/29/05
Test Results - "Bunker" Target
Concrete Layer 1
Initiation
Concrete Layer 2
Concrete Layer 3
13© 2004 Kaman Aerospace Corporation© 2004 Kaman Aerospace Corporation 3/29/05
Impacts ExitsInitiation
Impacts ExitsInitiation
3 Concrete Layers
Catcher Plate
Impacts ExitsInitiation
Impacts ExitsInitiation
3 Concrete Layers
Catcher Plate
14© 2004 Kaman Aerospace Corporation© 2004 Kaman Aerospace Corporation 3/29/05
Test Results - "Heavy Bunker" Target
WTD91
Initiation
Massive Concrete Layer
15© 2004 Kaman Aerospace Corporation© 2004 Kaman Aerospace Corporation 3/29/05
Massive Target Catcher Plate
ImpactsExits
Initiation
16© 2004 Kaman Aerospace Corporation© 2004 Kaman Aerospace Corporation 3/29/05
Test Results - "Ship" Target
WTD91
Steel Plate 1
Initiation
Steel Plate 2
17© 2004 Kaman Aerospace Corporation© 2004 Kaman Aerospace Corporation 3/29/05
Catcher Plate
Steel Plate 1 Steel Plate 2
Initiation
Impacts
Exits
18© 2004 Kaman Aerospace Corporation© 2004 Kaman Aerospace Corporation 3/29/05
Key Qualified Requirements of PIMPF
Shock resistance: 10,000 g / 10 msec axial(required for Mephisto 8,000 g / 5 msec lateralexpected to withstand higher)Operating temperature : - 40 °C to + 63 °C
(Electronics tested to -54°C)Storage temperature : - 54 °C to + 71 °CEnvironmental Stressing: acc. to MIL-STD-331 and 810EMC Requirements : EUROFIGHTER and TORNADOReliability (Predicted): calculated acc. to MIL-HDBK 217– 85,000 hr storage 0.9856– 12 hr captive flight 0.9999– 45 min freeflight 0.9998
19© 2004 Kaman Aerospace Corporation© 2004 Kaman Aerospace Corporation 3/29/05
Foreign Comparative Test for PIMPF
Click on button to bring up FCT viewgraphs courtesy of NAWC/CLy of
NAWC/CL
Dale Spencer, 860-632-4477
dspencer–[email protected]
http://www.kaman.com/kamanaero.html
EADS/ TDWEADS/ TDW -- Herb Smith
H.J. Smith International, Inc703-406-3400email: [email protected]