n93-20137 a semiconductor bridge ignited hot gas piston
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N93-20137
A Semiconductor Bridge IgnitedHot Gas Piston Ejector PillJ
M. C. Grubelich and R. W. Bickes, Jr.
Explosive Components Department 2513
Sandia National Laboratories
Albuquerque, New Mexico
Presented by:
D. E. Mitchell
Explosive Components Department Manager
Approved for public release; distribution is unlimited.
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Outline
• Concept
• Performance
• Development
• Application
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• SYSTEM DEVELOPMENT
- Sensors
- Smart Firing Sets
- Digital Coupling (Wire and Optical)
- Explosive Component
- Smart SCB
• SCB INTEGRATION
- Discrete
- In-situ
• PARTNERING
- Government Facilities
- Private Industry
- Universities
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Technolo Transfer ,_
SANDIA - R&D
Technology Transfer
Commercialization, Production and Sales
Government Applications
SCB TechnologiesThiokol
Bulova
Hercules
License
Private Enterprise
SCB TechnologiesThiokoi
BAI
Products
Attitude Control Motors
RAP
UWARS
Air Bags
Blasting
CRADA
WFO
MIPR
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HERO STUDIES
* Direct RF Injection
- 10MHz-20W
- 200MHz-3W
- 8.9GHz-20W
- 10 Second Injection Times
- Franklin Institue: "Grossly Insensitive"
• NSWC Ground Plane Facility
High Level RF Environments
HF Communications Bands
Radar Frequencies
- Only One Unit Fired (Arc Conditions)
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SATELLITE FIRING SETS
• Multiple Fire
- 2200 micro-Farads
- Charge = 27.4 V
- Four Parallel Outputs
- Bridge Burst Delta t = 5 microseconds
• Single Fire
- 300 micro-Farads
- Charge 16 V
- Series Resistance 0.4 Ohms
- 2.5 mJ
- Function Time - 81 microseconds
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Motivation
• Develop a Low Firing Energy Ejector
• Control Acceleration Profile
• Control Ejection Velocity
• Use a Single Pyro Device for All Applications
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Why Use Pyro Actuators? [_
, ENERGY DENSITY
• FUNCTION TIME
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Results for THKP
• Recover 20% of Total Energy Available
• Losses - Condensed Species, Heat Transfer
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Summ,
• SCB - Safe Low Energy Igniter
• Ignite THKP with an SCB
• Use THKP to Pressurize Small Volume
• Vent Pressurized Volume to Eject Mass
• Control Velocity and Acceleration
• Simple Method to Determine Available Energy
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