electronic safety, arming and initiation capability overview · firmware using fpgas with anti-fuse...

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TELEDYNE EverywhereyoulookTM

Defence and Security RF POWER

Defence and SecurityRF POWER

Electronic safety, arming and initiation capability overview

Providing the power to detect, deceive, defend, defeat


teledyne-e2v.com

Contact [email protected]


Introduction

SAFETY, ARMING AND INITIATIONTeledyne e2v has been active in safety, arming and initiation technology since 1984.

The activity began with funding Exploding Foil Initiator (EFI) technology in conjunction with RARDE (now QinetiQ and Dstl). This built on the existing high speed switch tube technology already developed at Teledyne e2v.

Through the late 1980s and early 1990s, work was concentrated on EFI initiator research and characterisation, explosive material characterisation and firing circuit development.

Teledyne e2v secured its first product contract for an electronic safety and arming unit (ESAU), including EFI detonator, in 1994. This contract resulted in qualification of a basic firing system in

1996 and delivery of approximately 1,000 production devices.

Since the mid-1990s, the activity has grown and is now a key part of our future business strategy. Today, we are supplying electronic safety and arming units and motor safety ignition units containing EFI detonators to more than 15 weapon systems.

These include torpedoes, missiles and Explosive Ordnance Disposal (EOD) systems both for warhead initiation and rocket motor ignition.

Ongoing technology research into low energy EFIs and next generation electronic safety and arming systems is securing the Teledyne e2v portfolio for the future.

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Device key system parameters

• All Teledyne e2v safety and arming units are electronic in-line systems

• Designed for warhead initiation and rocket motor ignition

• Are available in single, twin and tandem output configurations

• Compliant with STANAG 4187, DEF STAN 59-114 and MIL-STD 1316, STANAG 4368

• Use Teledyne e2v proven standard low inductance firing circuit

• Interface with Teledyne e2v EFI detonators

• Have demonstrated high reliability and 20+ year’s life

• Have proven high ‘G’ survivability • Are designed to interface with the

specific weapon application • Have solid state sensing of various

platforms specific environments, ie: Umbilical break | Water pressure

• Acceleration/time (launch or flight)

• Distance measurement via acceleration double integration

• Gas pressure (rocket motor) • Have integrated impact sensing

function • Include programmable trigger/

intercharge delay • Have high levels of immunity to EM

environments • Demonstrated mechanical robustness • Teledyne e2v safety and arming unit

designs are ITAR free• Teledyne e2v detonators are

insensitive munition compliance and are characterised to STANAG 4560

• Can be mounted directly to the ESAU or on a flexi-circuit of length up to 1m

• Have explosive take-over proven into various warhead and explosive chain materials

• Material compatibility validated against STANAG 4147




Electronic safety and arming units (ESAU)

Key features• Solid-state sensors and electronics

detect independent environmental events, eg:

• Acceleration/time (launch and/or flight)

• Distance (launch and/or flight)• Gas pressure (rocket motor)• Water pressure (underwater

weapons)• Umbilical break (from various

platforms)• Safety switching and logic realised in

discrete circuitry to maximise safety• Electrical, mechanical and explosive

interfaces designed to meet specific weapon application

• Designed to meet DEF STAN 59-114 and STANAG 4187

ESAID Electronic safety, arming and initiation device (ESAID) with integrated EFI detonator for missile warhead application

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Ruggedised electronic safety and arming units

Key features• Solid-state sensors and electronics

detect independent environmental events

• Safety switching and logic realised in discrete circuitry to maximise safety

• Electrical, mechanical and explosive interfaces designed to meet specific weapon application and environment

• ESAU demonstrated to survive and operate during and following the mechanical shock event associated with target penetration

• EFI detonator demonstrated to survive and operate following the mechanical shock event associated with target penetration

• Variable firing delay after penetration up to 100ms


ESAU Electronic safety and arming unit with removable EFI detonator for missile warhead application (target penetrating)




Motor safety ignition units

Key features• Based on e2v proven safety and

arming technology, with Through Bulkhead Initiator (TBI)



• Designed to meet STANAG 4368

MSIU Electronic motor safety ignition unit (MSIU) with removable EFI detonator for ignition of through bulkhead initiator (TBI)penetrating)

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Tandem electronic safety and arming units


arming technology• Solid-state sensors and electronics




• ESAU demonstrated to survive and operate following the precursor charge detonation

• EFI detonator demonstrated to survive and operate following the precursor charge detonation

• Variable interchange firing delay after precursor charge up to 100ms


ESAU Electronic safety and arming unit with removable EFI detonators for tandem missile warhead application penetrating)




Multi-point safety and arming units






• Fully-characterised twin output detonator


EAFU Electronic arming and firing unit with removable twin EFI detonators for an EOD application penetrating

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Safety and arming units incorporating firmware




• Safety switching and logic realised in firmware using FPGAs with anti-fuse technology to maintain safety


• Designed to meet MIL-STD-1316

EAFU Electronic arming and firing unit incorporating firmware (shown with cover and encapsulation removed to show FPGAs)penetrating)




Exploding Foil Initiator (EFI) detonators

Key features• Hexanitrostilbene (HNS IV)

explosive fill• Flexi-circuit or rigid board

construction• Explosive output take-over proven

into various warhead and explosive chain materials

• Threshold energy: 0.2 J• 99.9% @ 95% confidence all-fire

energy: 0.29 J• Characterised in accordance with

STANAG 4560• Material compatibility tested against

STANAG 4147

EFI Example of removable EFI detonator

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Special to type and support services

Key features• Trials support services: on-site and in-field

test support • e2v also develop special to type variants

including;• Instrumented hardware• Telemetry substituting the HV output

with telemetry pulse• Detonator firing systems

• Design and support of trials equipment for qualification testing

• Surveillance life testing• Ongoing obsolescence management




Design capabilities

Key features• Design, modelling and testing of safety

critical, fully packaged circuitry for control and initiation of detonators

• Design and testing of high reliability, IM compliant detonators

• Design in accordance with DEF STAN 59-114, STANAG 4187 and MIL-STD 1316

• Comprehensive documentation to support type qualification and the unit safety case

• Reliability analysis using MIL-STD-217 or FIDES

• High speed electronic circuit simulation (ORCAD, PSPICE)

• Finite element analysis using ANSYS (mechanical, vibration, thermal)

• Design, synthesis and simulation of FPGAs• Full time safety management

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Manufacturing and test capabilities

Key featuresTeledyne e2v facility in Lincoln (UK) is licensed to store and test explosives and is approved to BS-EN-ISO 9001:2000 and BS-EN-ISO 14001:2004.

All operators are J-STD 001. Soldering and all products are inspected to IPC-A-610 (class 3).

Teledyne e2v facility is ESD compliant in accordance with BS EN 61340-5-1:2001.

Facility is fully equipped to manufacture and test and validate explosively filled initiation units including shock, vibration, humidity, temperature and pressure and acceleration test equipment.




Ongoing developments

Compact Safety & Arming UnitTeledyne e2v is undertaking an internally-funded project to develop a Compact SAU:

• Meeting the requirements of Def-Stan 59-114 and STANAG 4187• Characterise the detonator in accordance with the requirements of STANAG 4560• Develop an ITAR free, European-sourced design• Reduced space envelope for fireset and detonator compared with existing 3kV

design

Low Energy Exploding Foil Initiator (LEEFI) detonatorLEEFI detonator is a ‘drop-in’ module, either directly within the ESAU housing or mounted on a strip-line.

• HNS explosive pellet is the same used in the current e2v EFI Detonator design, with established take-over data

• Performance test results in line with design aims

Fireset developmentCompact fireset produced, to fit within a 25mm diameter, containing HV converter and trigger circuit.

• Nominal operating voltage 1,300V• European-sourced components within the design• Successful take-over of LEEFI detonator

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Switch developmente2v have developed a low-energy vacuum switch tube based on the current proven, established technology, offering the following benefits;

• Good margin on operating voltage levels; 5,000V hold-off• Low switch-on resistance, fast switching speed• Radiation hard• Guaranteed for a minimum of 50 discharges• High level of immunity of trigger circuit• Preliminary environmental and high ‘G’ testing completed, demonstrating mechanical

robustness• Shot-to-shot performance characterised, showing very high repeatability (suitable for

multi-point applications)

Motor Ignition Safety Device (ISD)e2v is undertaking an internally-funded project to develop a compact motor safety ignition unit, including the initiator, based on the technology developed in the compact fireset programme.

• Meeting the requirements of STANAG 4368• Develop an ITAR free, European-sourced design• Define a common module that can interface with a large number of current and

proposed missile motors

Direct initiation of a pyrogen pellet within the ISD has enabled a design that offers no explosive content within the ISD.





Multi-point initiatione2v is currently developing a multi-point initiation system based on the technology developed in the compact fireset programme. The development will:

• Meet the requirements of Def-Stan 59-114 and STANAG 4187• Develop an ITAR free, European-sourced design• Produce repeatable and precise, selectable initiation of four detonators

Initial trial work has demonstrated that the initiation of the four independent detonators is significantly within the timing limits required for simultaneous initiation.

Ultra-Fast Arm & Firee2v is undertaking an internally-funded project to develop an ultra-fast fireset architecture that will enable:

• Sub millisecond (< 1ms) Arm & Fire• No energy accumulation until all Safety Breaks are removed• Technology is applicable to both SAUs and ISDs

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electronic safety, arming and initiation capability overview · firmware using fpgas with anti-fuse...

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